Mestrado em Genética e Melhoramento de Plantas (EA)
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Item Qualidade de grãos em feijoeiro-comum: estimativas de parâmetros genéticos, interação com ambientes, eficiência de seleção e correlação entre caracteres(Universidade Federal de Goiás, 2018-06-29) Almeida, Danilo Valente; Melo, Leonardo Cunha; http://lattes.cnpq.br/9132553601896172; Melo, Patrícia Guimarães Santos; http://lattes.cnpq.br/1508679345970114; Melo, Patrícia Guimarães Santos; Melo, Leonardo Cunha; Silva, Fernanda de Cássia; Ribeiro, Nerinéia DalfolloCommon bean (Phaseolus vulgaris L.) is one of the most important crops related to human feeding playing an important role in ensuring food security. Bean is an important source of protein, besides providing considerable amount of fiber and micronutrients as iron and zinc. Thus, the search for genotypes with high nutritional value grains and that meet standards for commercialization is among the objectives of common bean breeding program, specially the carioca grain type one, the preferred, according to the demand for more nutritious and fast foods. Thus, this work has for objectives: I) To investigate the genetic variability and the environment and genotype-environment interaction effects on seed iron (FeC), zinc (ZnC), crude fiber (CF) and protein content (PC), cooking time (CT), grain yield (GY), 100 grain weight (GW), sieve yield (SY), grain color at harvest (GCH) and grain color after 90 days of storage (GCS); II) To evaluate the degree of information of evaluations for grain quality conducted in an environment; III) To estimate genetic parameters and genetic gains for FeC, ZnC, CF, PC and CT; IV) To estimate phenotypic, genetic and environmental correlations between grain quality traits and GY; V) To select advanced common bean lines with carioca grain type superior for grain quality. 81 common bean lines with carioca grain type were evaluated in Preliminary Tests (PT) in triple lattice design 9x9 with plots of two 4-meter rows. In these trials the traits GY, SY and GW were evaluated and FeC, ZnC, CF, PC and CT were evaluated in only one PT. In this trial the phenotypic and genetic parameters and the genetic gains were estimated. The 20 superior lines were selected considering FeC, ZnC, CF, PC and CT and then evaluated in Validation Tests (VT), conducted in 9environments, between 2015 and 2017, in randomized complete block design with 3 replicates and plots of one 4-meters row. Analysis of variance and joint analysis were performed for all the grain quality traits FeC, ZnC, CF, PC, CT, GY, SY, GCH, GCS and GW evaluated on VT. The phenotypic, genetic and environmental correlations were estimated between the traits FeC, ZnC and GY. The phenotypic adaptability and stability parameters were estimated based on the method proposed by Nunes et al. (2005) and the selection of the best genotypes for grain quality was performed based on the index of Mulamba & Mock (1978). The preliminar evaluation of the grain quality traits was efficient and suficient for selecting the superior genotypes for FeC, CF, PC and CT, however, based on the GxE interaction detected, it is recommended to evaluate in at least 2 environments. Significant effects of genotype, environment and genotype-environment were detected for all the traits evaluated on VT. Based on the genetic variability detected, genetic gains can be obtained with the selection for FeC, ZnC, PC and CT, but for CF the available variability is a challenge to obtain important gains. The phenotypic and genetic correlations between FeC and ZnC were significant, wich indicate simultaneous gains for these traits. The lines CNFC 16627, CNFC 16518, CNFC 16602, CNFC 16615 and CNFC 16520 can be used for the improvement of carioca grain quality.Item Progresso genético para produção de grãos obtido em doze anos de melhoramento da população elite de arroz de terras altas(Universidade Federal de Goiás, 2015-08-10) Barros, Matheus Souza de; Morais, Orlando Peixoto de; http://lattes.cnpq.br/2175152793170778; Melo, Patrícia Guimarães Santos; http://lattes.cnpq.br/1508679345970114; Melo, Patrícia Guimarães Santos; Morais, Orlando Peixoto de; Torga, Paula Pereira; Silva Filho, João Luiz daThe genetic improvement resulted from plant breeding acts decisively in maintaining the supply of agricultural foods like rice. The contribution of this genetic improvement to increase productivity is expressed in many crops by genetic progress which represents the genetic changes in the course of the selection cycles, and promotes the advance of genotypic average towards selection. Among the strategies adopted to increase the gain by selection, the early generation selection proves to be promising. This work has aimed to evaluate the genetic potential for selecting upland rice progenies and estimate the genetic progress for grain yield. The data used in this study were obtained from the progeny yield trials conducted in the period of eleven agricultural years 2002/03 to 2012/13 conducted by Embrapa Rice and Beans. The traits analyzed were grain yield (kg ha-1), plant height (cm) and days to flowering (day). In each year of the experiment, a group of progeny was tested in four to six sites. It was used Federer's augmented block design without replication per site in seven years and with at least three checks, in four years of the series were used two replications. The experimental data within each year were submitted to joint analysis. A mixedeffects linear model was applied for estimating the components of variance by the method of restricted maximum likelihood (REML). From this estimate of the components, it was calculated the genetic and phenotypic parameters, in addition the selective accuracy, the experimental precision coefficient, the experimental variation coefficient and relative variation coefficient. The genetic progress was estimated by the method of generalized linear regression of the adjusted means of progeny groups evaluated in each year by the mixed model approach. The estimates of the relative annual mean gain and the total relative gain for the three studied traits were also obtained. The estimates of genetic variance among progenies for grain yield were highly significant (p < 0.001), except for the progeny group evaluated in 2007. The heritability estimation ranging from 0.22 to 0.69 that, associated with the selective accuracy, indicates the expected level of efficiency with early generation selection in each group of progenies. For Plant height and daysto- flowering, the genetic variance estimates were significant (p ≤ 0.01) in all groups. The variance components for these traits led to a rather high heritability estimation that suggests favorable conditions for selection in early generations. The genetic progress for grain yield (80.5 kg ha-1 yr-1) was highly significant. This value represents a relative annual mean gain of 2.88%. Throughout the period, the cumulative gain was estimated in 32.86% which indicates an increase of 918 kg ha-1 for grain yield. The response for plant height was not significant, suggesting that the height of progenies remained stable over the period. For days-to-flowering, it was detected significant increase in cycle length, indicated by the cumulative increase of the vegetative period in about five days (6.73%). From these results we conclude that early generation selection, adopted by the breeding program, were effective in promoting the genetic gain for grain yield in the elite populations.Item Estabilidade e potencial produtivo de linhagens de feijão-comum desenvolvidas sob fixação biológica de nitrogênio avaliadas em multi-ambientes(Universidade Federal de Goiás, 2023-10-31) Caetano, João Pedro Miranda; Melo, Leonardo Cunha; http://lattes.cnpq.br/9132553601896172; Melo, Patrícia Guimarães Santos; http://lattes.cnpq.br/1508679345970114; Melo, Patrícia Guimarães Santos; Vidotti, Miriam Suzane; Dias, Polianna Alves Silva; Melo, Leonardo CunhaChemical nitrogen fertilization is a common practice in bean fertilization, but it is expensive and can have negative environmental impacts, as well as synthetic fertilizer not being a renewable source. Biological nitrogen fixation (BNF) is one of the most sustainable ways of supplying legumes with nitrogen. In the last two decades, BNF has returned to the focus of common bean breeding programs, mainly by evaluating the potential of strains for BNF in various environments, with a view to recommending adapted and stable genotypes. The aim of this work was to evaluate the performance and productive stability of elite common bean lines of the carioca group developed under BNF. The lines were obtained by crossing the genitors CNFC10762 and the wild accession G234999A, which has a high BNF rate but few favorable agronomic characteristics. After backcrossing, the progenies that were advanced and selected under BNF were obtained. The 15 elite lines (L) obtained and three check genotypes were evaluated in six environments, made up of the combination of location/harvest/year. Two experiments were conducted in each environment, one with nitrogen fertilization of 120 kg ha-1 of nitrogen through mineral fertilizers and the other inoculated with a mixture of Rhizobium tropici and R. freirei without mineral nitrogen fertilization. The experimental design was randomized blocks with three replications, and the plots were made up of three three-metre rows spaced 0.5 m apart. Individual and joint analyses of variance were carried out for grain yield and the stability analysis was done using the WAASB method, which combines the predictive capacity of the BLUP mixed model with the graphical tools of the AMMI model. The effect of the L x FN interaction was significant (P<0.01), with the genotypes performing better when there was nitrogen fertilization. Among these strains, CNFC10762 and CNFC20367 had the best performance and productive stability when both N sources were considered, i.e. they have dual aptitude characteristics and are adapted to both mineral N and BNF systems. For inoculated environments, the control CNFC10762 and the genotypes CNFC20389, CNFC20367 and CNFC20379 stood out, showing the best relationship between productive performance and stability. Common bean breeding was unable to develop lines, originating from wild germplasm, that are more productive than the controls genotypes developed under an exclusive system of mineral N fertilization. The lines from this work will be indicated as progenitors to form new breeding base populations.Item Depressão endogâmica e variabilidade genética de populações para produção de milho verde(Universidade Federal de Goiás, 2020-03-30) Cascão, Luma Mariano; Resende, Marcela Pedroso Mendes; http://lattes.cnpq.br/2080097211870591; Melo, Patrícia Guimarães Santos; http://lattes.cnpq.br/1508679345970114; Melo, Patrícia Guimarães Santos; Resende, Marcela Pedroso Mendes; Vidotti, Mirian Suzane; Reis, Edésio Fialho dosThe production of vegetable corn is an activity of great importance for several regions of Brazil. Despite this, breeding programs have devoted little effort to developing and recommending cultivars specifically for this purpose. Then, it is essential that programs for the improvement of public institutions seek to serve this niche market, which has a relevant social role, as it is conducted mainly in small areas. This work aimed to estimate inbreeding depression and the genetic components of three populations for the production of vegetable corn. The populations evaluated have a different genetic basis: a variety of open pollination, called UFG-Samambaia (P1), a population obtained by crossing two older hybrids (P2) and a third population obtained by crossing of the modern hybrids (P3). Progenies of these three populations were obtained by sampling self-fertilized S0 plants. S1 progenies, three S0 populations and two checks were evaluated in a triple lattice 14 x 14 with plots of a four meter line. They were evaluated the agronomic traits: ears weight, plant height, ears height, relative position of the ear, breaking and lodging plants, days to anthesis, days to silking; and quality traits of ears: mass weight, ears weight without straw, length of ears without straw, ears diameter, ear alignment, ear stuffing, grain color. Statistical analyzes were performed using a mixed model approach. Inbreeding depression was estimated for all characters and the components of means (m + a ’and d) and variance. Genetic variability was observed for most traits among P1 progenies. The progenies of the P2 and P3 populations did not show genetic variability for most characters. The three populations suffered an impact when subjected to self-fertilization due to the effects of inbreeding. Inbreeding depression in P1 has higher rates for most characters: plant height, ear height, relative ear position, mass weight, length of ears without straw, alignment of ears and stuffing; In P2, the male flowering characters, weight of ears without straw and diameter of ears show a higher index and in P3, the characters of ear weight, female flowering, breakage and lodging and grain color. In general, the quality characters of the ear, important for the production of green corn, the greater depression due to inbreeding than the agronomic characters. This shows that, inbreeding depression must be considered in the selection process, with the frequency of favorable alleles increasing throughout the improvement process.Item Progresso genético do programa de seleção recorrente para produtividade de grãos de feijoeiro-comum da EMBRAPA(Universidade Federal de Goiás, 2018-09-28) Farias , Filipe Cavalcante; Melo, Leonardo Cunha; http://lattes.cnpq.br/9132553601896172; Melo, Patrícia Guimarães Santos; http://lattes.cnpq.br/1508679345970114; Melo, Patrícia Guimarães Santos; Resende, Marcela Pedroso Mendes; Silva, Fernanda de CássiaThe advantage of using recurrent selection is the increase of favorable alleles without significant loss of genetic variability present in the population. The objectives of this study were to estimate the genetic progress in two cycles of recurrent selection for grain yield, lodging resistance, plant architecture and commercial quality of grains and to study the adaptability and stability of the progenies of the two selective cycles. The 19 best progenies of cycle 0 (C0) and 20 of cycle 1 (C1) and three controls (BRS Cometa, BRS Pontal and BRS Estilo) were evaluated in nine environments. The 42 treatments were arranged in randomized blocks, with three replications. The plots consisted of two lines of four meters and spacing of 45 cm between rows. The estimated genetic progress (PG) was obtained based on the comparison of the means of the progenies selected in each cycle. Genetic variability was verified between the progenies of the two cycles for all evaluated characters. Genetic progress for grain yield was 11.5% (1.9% per year), plant architecture and lodging resistance 5.8% (0.9% per year) and 14% (2.3% per year), respectively. Regarding the commercial quality of grains, the genetic progress was 4.2% (0.7% per year), 1.9% (0.6%) 4.4% (0.73% per year) for mass of 100 grains, sieve yield and grain color score, respectively. It was also verified greater phenotypic stability of C1 progenies in relation to C0. These results prove the efficiency of the recurrent selection program in obtaining genetic gains for several complex inheritance characters.Item Parâmetros genéticos e fenotípicos em arroz irrigado estimados por método de análise espacial(Universidade Federal de Goiás, 2014-02-28) Guimarães, Paulo Henrique Ramos; Morais, Orlando Peixoto de; Melo, Patrícia Guimarães Santos; http://lattes.cnpq.br/1508679345970114; Melo, Patrícia Guimarães SantosSome spatial analysis methods have been applied in order to mitigate environmental variation. The objective of this study was to evaluate the efficiency of spatial statistical, through the method of Papadakis, relative to the analysis to augmented blocks Federer in the correction of environmental variation. Were evaluated 198 progenies S0:2 of rice and four witnesses for augmented blocks of Federer. Data set were taken in the grain yield (GY, kg ha- 1) and plant height (PH, cm). The data set were subjected to variance analyses and were estimated the genetic and phenotypic parameters. The different approaches (BAF and Papadakis) were compared as to their estimates of genetic and phenotypic parameters. The ranking of adjusted means in the two models analyzed was performed, and calculated the Spearman correlation. There have been improvements in the statistics that depict the experimental accuracy when the spatial analysis was, that affect the estimates of genetic and phenotypic parameters. The use of the Papadakis method yielded fewer iterations compared to BAF for the same value of . Was able to gain direct selection for the AP and PG characters when the Papadakis method was used. With the use of spatial analysis selection was less influenced by the effect of environmental variation. Finally it was found that the spatial analysis methods were effective in the removal of environmental effects highlighting the Papadakis method, indicating that it can provide improvementItem Adaptabilidade e estabilidade de linhagens de arroz de terras altas por meio da lógica fuzzy(Universidade Federal de Goiás, 2022-12-05) Maciel, Douglas de Oliveira; Melo, Patrícia Guimarães Santos; http://lattes.cnpq.br/1508679345970114; Melo, Patrícia Guimarães Santos; Ramos, Paulo Henrique; Botelho, Flavia Barbosa SilvaThe selection of lines for characters of agronomic interest is done with evaluations in different environments. As the environments are diversified and several lines are evaluated, it is expected that the interaction between genotypes by environments will occur, and that it will play an important role in the manifestation of the phenotype. Adaptability and stability studies have been used in breeding programs to help the selection process where the interaction of genotypes by environments has been reported. The evaluation is based on parameters provided by methodologies and requires the breeder's experience, making it difficult as the number of evaluated genotypes increases. Fuzzy logic stands out for allowing the automation of decision making, and also classifying how much a genotype belongs to each set. The objective of this work was to evaluate the genotypes in terms of adaptability and stability through fuzzy logic, using data on agronomic characters of upland rice from the breeding program of UFG and partners. Eight lines from the UFG breeding program, ten from UFLA and two commercial cultivars were evaluated for grain yield, plant height and number of days to flowering, in VCU trials at six locations in the state of Goiás in four agricultural years, in the 2017/18 to 2020/21 harvests. The trials varied between locations over the years, totaling thirteen environments for grain yield and plant height, and eight environments for number of days to flowering. The design was complete randomized blocks, with three replications, and plots of four lines of 4 meters, spaced by 0.45 meters. The useful area considered was 3 meters from the central lines. The adaptability and stability analyzes considered a fuzzy controller based on the Eberhart and Russell (1966) method, and a hybrid controller, based on the Lin and Binss (1988) methods, modified by Carneiro (1998) and associated with Eberhart and Russell (1966). Both controllers classified the lines into four sets in terms of performance relative to adaptability and stability (general, poorly adapted, favorable environments, unfavorable environments). The CSD 08004 line showed broad adaptability and stability for plant height and grain yeld, in addition to a pertinence value close to classification as adaptability and general stability for the number of days to flowering. Thus, the CSD 08004 line can be recommended for cultivation in the region of the State of Goiás.Item Variabilidade e progresso genético com seleção recorrente em arroz de terras altas(Universidade Federal de Goiás, 2013-03-14) Morais Júnior, Odilon Peixoto de; Colombari Filho, José Manoel; Morais, Orlando Peixoto de; Melo, Patrícia Guimarães Santos; http://lattes.cnpq.br/1508679345970114; Melo, Patrícia Guimarães Santos; Geraldi, Isaias Olívio; Miranda Filho, José Branco de; Colombari Filho, José ManoelRice (Oryza sativa L.) is the most important cereal in the world as a major component of the staple food of the world’s population. The increase of the yield potential of new upland rice cultivars has been became highlighted as a main challenge for the plant breeding in this millennium. The increasing mean yield of cultivars becomes more difficult to identify superior genotypes, because the contrasts among elite-lines are becoming smaller. This highlights the importance of developing improved populations with high frequency of favorable alleles and genetic variability. The recurrent selection is a method based on population breeding and the main characteristic is obtaining long-term results. Using the recurrent selection population CNA6 of upland rice, the objectives of this study were: (i) to obtain estimates of genetic and phenotypic parameters among S0:2 progenies for grain yield (PG, in kg ha-1) and plant height (AP, in cm), in four selection cycles; (ii) to determine the influence of the progeny x location interaction on estimates of genetic and phenotypic parameters; (iii) to estimate the genetic progress of the population along the four cycles of recurrent selection for PG, AP and days-to-flowering (DF, in days); and (iv) to evaluate the genetic potential of this population through the expected proportion of superior lines after each selection cycle. It was used the data set from yield trials of S0:2 progenies in the years 2000/01, 2003/04, 2006/07 and 2009/10 from Brazilian Agricultural Research Corporation (Embrapa). In each cycle, the trials were carried out in some locations (Santo Antônio de Goiás-GO; Paragominas-PA; Primavera do Leste, MT; Sinop-MT; Teresina-PI and Vilhena-RO). The experimental design was augmented block of Federer, without replicate within location and with at least three checks. The plots were composed by four rows with five meters long, spacing of 0.30 m, and density of 60 seeds per meter. In each cycle, the data set from PG and AP were subjected to individual analysis of variance for Santo Antônio de Goiás-GO, the unique common location in all cycles, and joint analysis of variance for all locations. Estimates of phenotypic, genotypic and environment correlations among three traits studied was obtained. The average gains per cycle, and average annual gains and total were estimated, as also the weighted coefficients of determination and gains among cycles and the total gain based on contrasts among estimated averages for each cycle. In addition, the expected proportions of superior inbred lines after each selection cycle were obtained, using the average of the checks as standard. Estimates of genetic correlations between PG and AP were -0.42 and between AP and DF the -0.11 , both significant (p0,01), and no correlation was detected among PG and DF. Thus, within this population progenies with higher grain yield had lower plant height, and cycle may be early, medium or late. Estimates of genetic variance among S0:2 progenies suggested that genetic variability was maintained along the cycles of selection for the traits PG and AP. After unfolding of the genotype x location interaction (GxL) was observed predominance of the crossover interaction for PG and AP. Finally, it was found that the GxL interaction affected the estimates of genetic and phenotypic parameters for both traits, due to the wide geographic distribution of the target environments, which the recurrent selection program aims to obtain genetic gains in medium and long term. The results show clearly the efficiency of recurrent selection program in the progress of the population mean for grain yield and plant height, with significant genetic gains observed during the four cycles of selection. The genetic potential of the population to develop superior inbred lines increased during to selection cycles for grain yield and plant height. Despite the absence of genetic gain for days-to-flowering, the genetic potential for this trait was kept in the population during the four cycles elapsed.Item Desempenho de famílias de feijoeiro-comum de uma população de seleção recorrente para resistência ao crestamento bacteriano comum(Universidade Federal de Goiás, 2017-08-30) Silva, Helton Salles da; Melo, Leonardo Cunha; http://lattes.cnpq.br/9132553601896172; Melo, Patrícia Guimarães Santos; http://lattes.cnpq.br/1508679345970114; Melo, Patrícia Guimarães Santos; Resende, Marcela Pedroso Mendes; Silva, Fernanda de CássiaThe common bean culture (Phaseolus vulgaris L.) plays an important role in human feeding and its use occurs in a wide range of planting’s systems. Therefore, it is indeed necessary to develop cultivars adapted to these different systems and which serves both the needs of producers and consumers. Different factors have contributed to decrease the crop yield, among these, we highlight the common bacterial blight (CBB) caused by Xanthomonas axonopodis pv. Phaseoli and Xanthomonas fuscans subsp. Fuscans. In this sense, the main objectives of the present study was to: (i) evaluate the genetic potential and to select superior progenies from a population of recurrent selection for resistance to CBB in common bean of the black commercial group; (ii) study the adaptability and stability of families S0:4, S0:5 and S0:6 in different environments; (iii) estimate the genetic gains obtained with the selection of the ten best families; and (iv) select families that are resistant to CBB while associated to other variables of agronomic importance such as grain yield, plant bedding and resistance to anthracnose. Sixty families of a C0 population were evaluated in the years 2015 and 2016 in different environments, in randomized blocks design with three replicates. After the evaluations, analyzes of individual and joint variance were performed, as well as the application of the ranks sum index using “Genes” software. Subsequently, analyzes of adaptability and phenotypic stability were performed in the selected families, using the methodology of Nunes et al. From the simultaneous selection for grain yield and resistance to CBB, ten families considered more promising were selected. Then, a new selection was made, including the plant bedding criteria and, lastly, the variable anthracnose resistance was included. Selection gains were obtained for all the variables. Most of the selected families presented better individual results in relation to the resistance to CBB variable. And the great majority of the selected families presented themselves adapted and stable, mainly in comparison with other bean treatments. Among the families with the best performance, the families SRCP.55 and SRCP.318 were highlighted for grain yield, resistance to CBB and anthracnose. By selecting these families, it is expected that they may be used in hybridization stages carried out in new studies, either as parents in other programs as sources of resistance to CBB, or in their use as new cultivars.Item Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo(Universidade Federal de Goiás, 2015-02-12) Vidotti, Miriam Suzane; Colombari Filho, José Manoel; http://lattes.cnpq.br/6219757785427246; Oliveira, Tereza Cristina de; Melo, Patrícia Guimarães Santos; http://lattes.cnpq.br/1508679345970114; Melo, Patrícia Guimarães Santos; Fritsche Neto, Roberto; Rangel, Paulo Hideo Nakano; Colombari Filho, José ManoelThe upland rice has a high potential for expansion in the Brazilian savannahs region, where soils have limiting factors to yields, such as low phosphorus (P) availability. Considering the costs and the natural reserves scarcity, a suitable alternative is to explore the genetic resources to develop cultivars with P deficiency tolerance and P-use efficiency. Given the polygenic inheritance of these traits, a strategy is to concentrate the favorable alleles gradually through recurrent selection. The objectives of this study were to estimate genetic and phenotypic parameters, and evaluate progenies from CNA9/3/1 recurrent selection population of upland rice for the tolerance to P deficiency in the soil. In 2011/12 crop year, in Santo Antônio de Goiás-GO and Sinop-MT, two contrasting trials were conducted within each location: low and high P-level determined by the clay content of the soil, and without discrimination of other crop practices. The simple square lattice design 14 x 14 was adopted, with 189 S0:2 progenies and seven checks, with plots consisted of four 3-m-long rows. Grain yield (GY, in kg ha-1), plant height (PH, cm) and days-to-flowering (DF, in days) were evaluated. The individual variance analysis by location and by P-level were obtained, well as their phenotypic, genetic and environmental correlations. Only for PG, genetic and phenotypic parameters were estimated from joint analysis of variance within each P-level, and involving locations and P-levels. Estimates of the expected response to selection were obtained for the two P-levels, considering the direct, indirect and general selection criteria, and also the Harmonic Mean of Relative Performance (𝑀𝐻𝑃𝑅) and Tolerance Index (𝐼𝑇) of the genotypes identified as efficient and responsive from a graphic dispersion of adjusted means. The overall average of the GY was reduced significantly in 27% for P deficiency in the soil and the genetic variance among S0:2 progenies (𝜎̂𝑝 2) was narrowed in 63%. Highly significant diferences (p≤0.01) were observed among progenies, demonstrating the presence of sufficient genetic variability for GY, in this population, to obtain genetic progress in both P-levels. The progenies showed performance significantly (p≤0.01) below the of checks and also a significant interaction (p≤0.01) with locations, in both P-levels. The genotype x Plevel interaction was significant (p≤0.01) and the phenotypic correlation (√R2) between Plevels was low (0.44). In this sense, the expected response to selection demonstrated that progenies must be evaluated in P-deficient environments to obtain effective genetic gain in this environment. The genetic correlations between traits were significant (p≤0.01) and are favorable for the selection of genotypes with tolerance to P deficiency, short plant height and early cycle. However, there is a greater difficulty in increasing the yield potencial, since there the genetic correlation between this trait and PH was significant (p≤0.01) and positive (𝑟𝐺= 0.385). From the graphic dispersion of S0:2 progeny means have been identified 57 efficient and responsive to the presence of P in the soil, and for the selection within this group, the 𝑀𝐻𝑃𝑅 was more appropriate than 𝐼𝑇, because considering simultaneously these two attributes.