Silva K B, Bruzi A T, Zambiazzi E V, Soares I O, Pereira J L A R, Carvalho M L M
Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil
Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil.
Genet Mol Res. 2017 May 10;16(2):gmr-16-02-gmr.16029646. doi: 10.4238/gmr16029646.
This study aimed at verifying the adaptability and stability of soybean cultivars, considering the grain yield and quality of seeds, adopting univariate and multivariate approaches. The experiments were conducted in two crops, three environments, in 2013/2014 and 2014/2015 crop seasons, in the county of Inconfidentes, Lavras, and Patos de Minas, in the Minas Gerais State, Brazil. We evaluated 17 commercial soybean cultivars. For adaptability and stability evaluations, the Graphic and GGE biplot methods were employed. Previously, a selection index was estimated based on the sum of the standardized variables (Z index). The data relative to grain yield, mass of one thousand grain, uniformity test (sieve retention), and germination test were standardized (Z) per cultivar. With the sum of Z, we obtained the selection index for the four traits evaluated together. In the Graphic method evaluation, cultivars NA 7200 RR and CD 2737 RR presented the highest values for selection index Z. By the GGE biplot method, we verified that cultivar NA 7200 RR presented greater stability in both univariate evaluations, for grain yield, and for selection index Z.
本研究旨在通过单变量和多变量方法，综合考虑大豆品种的籽粒产量和种子质量，验证大豆品种的适应性和稳定性。试验于2013/2014年和2014/2015年作物季，在巴西米纳斯吉拉斯州因孔菲登特斯县、拉夫拉斯和帕托斯迪米纳斯进行了两季作物、三种环境的试验。我们评估了17个商业大豆品种。对于适应性和稳定性评估，采用了图形法和GGE双标图法。此前，基于标准化变量之和（Z指数）估计了一个选择指数。将每个品种的籽粒产量、千粒重、均匀度测试（筛网保留率）和发芽测试数据进行标准化（Z）。通过Z值之和，我们获得了一起评估的四个性状的选择指数。在图形法评估中，品种NA 7200 RR和CD 2737 RR的选择指数Z值最高。通过GGE双标图法，我们验证了品种NA 7200 RR在籽粒产量和选择指数Z的单变量评估中均表现出更高的稳定性。
