Adaptability and stability of wheat genotypes according to the phenotypic index of seed vigor

Abstract: The objective of this work was to evaluate the adaptability and multi-trait stability of wheat (Triticum aestivum) genotypes according to the phenotypic index of seed vigor (PIV). Thirty wheat genotypes were grown in seven environments in the state of Rio Grande do Sul, Brazil, during one crop season. In each environment, a randomized complete block design with three replicates was used. The PIV was elaborated from the following traits: first germination count, germination percentage, accelerated aging, and electrical conductivity. The evaluated phenotypic index makes it possible to define macroenvironments for the production of wheat seeds with high physiological potential and to understand the implications of the genotype x environment interaction. The phenotypic index of seed vigor is effective to rank genotypes considering multi-trait selection related to the vigor of wheat seeds produced in Southern Brazil.

摘要：本研究旨在基于种子活力表型指数（Phenotypic Index of Seed Vigor, PIV），评估普通小麦（Triticum aestivum）基因型的适应性与多性状稳定性。本研究于一个作物生长季内，在巴西里奥格兰德州的7个试验环境中种植了30份小麦基因型。各试验环境均采用随机完全区组设计，设置3次生物学重复。该种子活力表型指数由以下4个性状构建而成：初次发芽计数、发芽率、加速老化试验以及电导率测定。通过该表型指数，可划定具备高生理潜力的小麦种子生产大环境，并解析基因型×环境互作的影响。种子活力表型指数可有效对巴西南部产区生产的小麦种子对应的基因型进行排序，以开展与种子活力相关的多性状选择。