Chromosomal localization of the genes controlling phenotypic stability in rye using GGE-biplot

摘要

Chromosome addition lines have often been used to map the genes on donor chromosomes based on the presence/absence of the genes on the chromosomes added to the recipient genome. In this study a set of wheat-rye Chinese spring-Imperial (CS-IMP) disomic addition lines (DALs) was used to locate the genes controlling yield stability on specific chromosome(s) in rye. Experiments were conducted using a randomized complete block design with three replications under both rainfed and irrigated conditions for three cropping seasons. The GGE genotype plus genotype x environment (GE) biplot methodology was used to analyze the grain yield data. The results of combined ANOVA showed significant (P<0.01) environment, genotype and GE interaction indicating remarkable changes in ranking of genetic materials over the environments. According to GGE biplot analysis, two parents (Chinese spring vs. Imperial) were different in their yield adaptation. The results also verified that it would be possible to determine contrasting DALs based on the stability and integrating yield with stability performance for improving wheat genetic materials. Ranking of the DALs based on the ideal genotype (high yield and stability) revealed that most of the genes involved in controlling high yield and stability are located on two chromosomes 7R and 5R in rye.