葱(Allium cepa L.)基因型遗传增益动态及选择指标预测

IF 0.7 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY
Vanessa Cláudia Vasconcelos Segundo, R. Innecco, Joelson André de Freitas, Gabriel Mascarenhas Maciel, José Magno Queiroz Luz, Ana Paula Oliveira Nogueira, Joicy Vitória Miranda Peixoto
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引用次数: 0

摘要

洋葱育种计划面临的最大挑战是以有效的方式从植物选择中获得收益。选择指数已经用于许多品种,但在洋葱中很少使用。本研究的目的是通过非参数指标来表征洋葱种质资源的选择增益。为了实现这种动态,用不同的基因型组进行了四个实验。对几种农艺性状进行了评价。从基于秩和的选择指数、基因型-理想型距离指数和乘性指数中获得基因型增益和选择的估计。为了检验所用指标的有效性,计算了符合系数。利用倍率指数进行选择获得的总收益更大,高级系和分离基因型的总收益分别为31.84%和37.4%。在每个试验中都有可能筛选出优良的洋葱品系。符合系数均大于0.5,证实这些指标在选择优良基因型时提供了安全裕度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamics and prediction of genetic gains through selection indices in (Allium cepa L.) genotypes
The greatest challenge in onion breeding programs is achieving gains from plant selection in an efficient manner. Selection indices are already in use for many species but are rare in onion. The aim of this study was to characterize the gain from selection in onion germplasm through nonparametric indices. To bring about this dynamic, four experiments were conducted with different sets of genotypes. Several agronomic characteristics were evaluated. Estimates of gains and selection of genotypes were obtained from the selection index based on rank sum, from the genotype-ideotype distance index, and from the multiplicative index. To test the efficiency of the indices used, the coefficient of coincidence was calculated. The total gains from selection were greater through use of the multiplicative index, with values of 31.84% for the advanced lines and 37.4% for the segregating genotypes. It was possible to select superior onion lines in each experiment. The coefficients of coincidence, all with values greater than 0.5, confirmed that the indices provided a margin of safety in the selection of superior genotypes.
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