Effect of genotype and environment on agronomical characters of alfalfa (Medicago sativa L.) in a typical acidic soil environment in southwest China

Alfalfa ( Medicago sativa L.), an important perennial legume forage crop with high nutritional value and yield, is widely used in animal husbandry. However, it very sensitive to aluminum, which severely limits its growth acidic soils. In this study, we analyzed the genotype variation of each agronomic trait 44 alfalfa varieties two soil environments. Then, analysis variance (ANOVA) components was performed using Residual Maximum Likelihood (REML). The best linear unbiased predictor obtain mean variety, values were construct matrix × traits interaction years. results showed that there significant P < 0.05) genotypic for genetic diversity abundant. average repeatability R value) interannual plant height (PH), stem thickness (ST), number branches (NS), fresh weight (FW), total (TFW), dry (TDW) (0.21–0.34), whereas genetics relatively stable. PH, NS, FW, TFW, (DW) positively correlated 0.01) TDW. Six (Algonquin, Xinjiang daye, Trifecta, Vernal, WL354HQ, Boja) excellent TDW TFW identified different years, environmental regions, climatic altitudes. Our research can provide suggestions critical information regarding future improvement development new strains are resistant conditions.