Ribeiro R M, do Amaral Júnior A T, Gonçalves L S A, Candido L S, Silva T R C, Pena G F
Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil.
Genet Mol Res. 2012 May 15;11(2):1417-23. doi: 10.4238/2012.May.15.12.
As part of the Universidade Estadual do Norte Fluminense recurrent selection program of popcorn, we evaluated full-sib families of the sixth cycle of recurrent selection and estimated genetic progress for grain yield and expansion capacity. We assessed 200 full-sib families for 10 agronomic traits, in a randomized block design, with two replications within sets in two environments: Campos dos Goytacazes and Itaocara, in the State of Rio de Janeiro, Brazil. There were significant differences for families/"sets" for all traits, indicating genetic variability that could be exploited in future cycles. In the selection of superior progenies, the Mulamba and Mock index gave the best gains for popping expansion (PE) and grain yield (GY), with values of 10.97 and 15.30%, respectively, using random economic weights. By comparing the evolution of the means obtained for PE and GY in the cycles C(0), C(1), C(2), C(3), C(4), C(5), and predicted for C(6), a steady increase was observed for both PE and GY, with the addition of 1.71 mL/g (R(2) = 0.93) and 192.87 kg/ha (R(2) = 0.88), respectively, in each cycle. Given the good performance of this popcorn population in successive cycles of intrapopulation recurrent selection, we expect that a productive variety with high expansion capacity will soon be available for producers in the north and northwest regions of Rio de Janeiro State, Brazil.
作为北弗卢米嫩塞州立大学爆米花轮回选择计划的一部分，我们评估了轮回选择第六轮的全同胞家系，并估计了籽粒产量和膨胀能力的遗传进展。我们在巴西里约热内卢州的坎波斯- dos -戈伊塔卡泽斯和伊塔奥卡拉两个环境中，采用随机区组设计，对200个全同胞家系的10个农艺性状进行了评估，每组内有两次重复。所有性状的家系/组间均存在显著差异，表明存在可在未来轮回中利用的遗传变异。在选择优良后代时，使用随机经济权重，穆兰巴和莫克指数在爆花膨胀率（PE）和籽粒产量（GY）方面获得了最佳增益，分别为10.97%和15.30%。通过比较C(0)、C(1)、C(2)、C(3)、C(4)、C(5)轮中获得的PE和GY均值的演变以及对C(6)轮的预测值，发现PE和GY均呈稳步增加，每轮分别增加1.71 mL/g（R² = 0.93）和192.87 kg/ha（R² = 0.88）。鉴于该爆米花群体在群体内轮回选择的连续轮次中表现良好，我们预计巴西里约热内卢州北部和西北部地区的生产者很快就能获得具有高膨胀能力的高产品种。
