The negative correlation between grain yield and popping expansion is an issue to obtain popcorn varieties. Simultaneous selection applying trait index selection is an efficient method to reach a maximum of combined genetic gain, and it is an alternative to aggregate interesting market trait in new popcorn varieties. This study aimed to evaluate intercharacter genetic parameters and to identify improved topcrosses hybrids of popcorn for grain yield, popping expansion, and weight of 100 grains, also to identify superior genotypes with multi-trait index selection. The experiments were sowed in two locals, where 144 hybrids of crosses of lines originated from the IA8383 population with IAC 12 and 144 hybrids of crosses of lines originated from IA8383 population with IA9614, sum 288 topcrosses hybrids, in RCBD. The mixed model equation was carried out to estimate BLUPs and perform the multi-trait index. The selection gains considering the multi-trait index reached 6.45%, 1.65%, and 2.4% respectively. Promising lines were selected to increase the tropical popcorn breeding program with the target in high yield and popping expansion.

谷物产量与爆米花膨化之间的负相关是获得爆米花品种的一个问题。利用性状指标选择的同时选择是一种有效的方法，可以最大限度地提高组合遗传增益，并且是在爆米花新品种中汇总有趣的市场性状的替代方法。这项研究旨在评估性状间的遗传参数，并鉴定出改良的爆米花杂交品种，以提高谷物的产量，爆裂性和100粒重，并鉴定具有多性状指标选择的优良基因型。在两个本地播种了该实验，其中RCBD中有144个来自IA8383群体的杂种杂种与IAC 12和144个来自IA8383群体的杂种杂种与IA9614杂种，总计288个Topcrosses杂种。进行混合模型方程以估计BLUP并执行多特征指标。考虑到多特征指数​​的选择收益分别达到了6.45％，1.65％和2.4％。选择有前途的品系来增加热带爆米花的育种计划，目标是高产和爆棚。