Desempenho de famílias de feijoeiro-comum de uma população de seleção recorrente para resistência ao crestamento bacteriano comum
Nenhuma Miniatura disponível
Data
2017-08-30
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
The 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.
Descrição
Citação
SILVA, H. S. Desempenho de famílias de feijoeiro-comum de uma população de seleção recorrente para resistência ao crestamento bacteriano comum. 2017. 101 f. Dissertação (Mestrado em Genética e Melhoramento de Plantas) - Universidade Federal de Goiás, Goiânia, 2017.