Selection of early soybean inbred lines using multiple indices

Soybean [Glycine max (L.) Merr.] has been studied and enhanced for most of its economically important traits. Previous research has studied the association among them and the effect of the genotype × environment interaction; however, less is known about their correlation considering absolute maturity, as well as the use of multiple selection indices to study the genotype × environment interaction and select superior cultivars. Regarding this, the aim of the present study was to identify lines that associate precocity, good yield performance, and high oil and protein contents in the grains, as well as to estimate the correlation among these traits and study the effect of genotype × environment interaction using a standardized multiple selection index. Trials were conducted in two crop seasons in the state of Minas Gerais, Brazil, with 39 lines in 13 evaluation environments. The experiments were conducted in a randomized complete block design with four replications, and the grain yield, a...大豆（Glycine max (L.) Merr.）多数经济重要性状均已得到系统研究与遗传改良。过往研究多围绕各性状间的关联，以及基因型×环境互作（genotype × environment interaction）效应展开，但针对以绝对生育期为考量维度的性状相关性分析，以及借助多选择指数开展基因型×环境互作研究并筛选优异品种的相关报道仍较为匮乏。有鉴于此，本研究旨在筛选兼具早熟性、优良籽粒产量表现及高籽粒油分与蛋白质含量的品系，同时估算上述性状间的相关性，并通过标准化多选择指数分析基因型×环境互作效应。试验于巴西米纳斯吉拉斯州的两个种植季开展，共设置13个评价环境，纳入39个供试品系。试验采用完全随机区组设计，设置4次重复，考察性状包括籽粒产量、[原文未完结内容]