Tolerância ao défice hídrico e eficiência do uso da água em genótipos de cebola
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2014-06-06
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Universidade Federal de Goiás
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The development of more adapted genotypes to water stress conditions and/ or more efficient water use is a priority that begins to be sought in different programs of genetic improvement of plants. Thus, knowledge of methodologies to be used in breeding programs to produce genotypes more tolerant to water stress conditions and more efficient water use is of paramount importance to this alternative to be viable. Based on the above, the objective was to study the response of onion genotypes to different levels of soil water that help the selection of plants with tolerance to drought and/ or which are more efficient in water use. We evaluated the effect of five levels of water deficit (100, 80, 60, 40 and 20% of ETc ) in eight genotypes of onion (“TX 08” , “Vale Ouro IPA – 11”, “BRS 367” , “Primavera”, “Optima F1”, “Franciscana IPA – 10” , “CNPH 6179org” and “Alfa Tropical”). The irrigations were performed whenever the strain of the soil water in treatments with 100% of ETc reached the critical soil water tension of 10 kPa. The design was used in a randomized block design (RBD) with five replications in a factorial 5 x 8 (blades x genotypes ) . Each experimental unit corresponded to a 10-liter vessel with 6 onion plants. The TX08 and IPA-10 genotype showed potential for use in breeding programs to drought tolerance, because their moderate sensitivity to drought, high water use efficiency and high productivity
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TOSTA, A. L. Tolerância ao défice hídrico e eficiência do uso da água em genótipos de cebola. 2014. 62 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Goiânia, 2014.