do Amaral Júnior A T, Dos Santos A, Gerhardt I F S, Kurosawa R N F, Moreira N F, Pereira M G, de A Gravina G, de L Silva F H
Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil.
Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil
Genet Mol Res. 2016 Dec 19;15(4):gmr-15-04-gmr.15049309. doi: 10.4238/gmr15049309.
A challenge faced by popcorn breeding programs is the existence of a negative correlation between the two main traits, popping expansion and yield, which hinders simultaneous gains. The objective of this study was to investigate the use of a new variable or super trait, which favors the reliable selection of superior progenies. The super trait 'expanded popcorn volume per hectare' was introduced in the evaluation of 200 full-sib families of the eighth recurrent intrapopulation selection cycle, which were arranged in randomized blocks with three replicates in two environments. Although the inability to obtain simultaneous gains through selection via popping expansion or yield was confirmed, the super trait was positively associated with both yield and popping expansion, allowing simultaneous gains via indirect selection using 'expanded popcorn volume per hectare' as the main trait. This approach is recommended because this super trait can be used in breeding programs to optimize selective gains for the crop.
爆米花育种计划面临的一个挑战是，爆裂膨胀和产量这两个主要性状之间存在负相关，这阻碍了同时取得进展。本研究的目的是调查一种新变量或超级性状的用途，该变量或性状有利于可靠地选择优良后代。在第八个轮回群体内选择周期的200个全同胞家系的评估中引入了“每公顷膨胀爆米花体积”这一超级性状，这些家系在两个环境中按随机区组排列，重复三次。尽管通过爆裂膨胀或产量选择无法同时取得进展这一点得到了证实，但该超级性状与产量和爆裂膨胀均呈正相关，从而能够以“每公顷膨胀爆米花体积”为主要性状通过间接选择同时取得进展。推荐采用这种方法，因为这种超级性状可用于育种计划，以优化作物的选择增益。
