Stability Analysis of Hulless Barley Varieties in Multi-year Multipoint Regional Trials in of Gansu Based on GGE Model
GGE model is one of the appropriate methods for investigating the geno-type—environment interac-tion.In this study,the yield trait data of seven varieties(lines)in the eleventh round of hulless barley regional trials in Gannan Prefecture,Gansu Province from 2018 to 2020 were analyzed by ANOVA and yield stability and adap-tability based on the GGE model at five experimental sites.The results showed that the differences between blocks,varieties(lines),locations,years,varietiesxlocations,varietiesxyears,locationsxyears and varietiesxlocationsx years were highly significant(P＜0.01),with the location variation accounting for 67.43％of the sum of squares of the total variation.PC1 and PC2 explained that the environmental interaction effect among different varieties(lines)of hulless barley in 2018,2019 and 2020 was 70.26％,88.92％and 74.64％,respectively.The seven hulless barley varieties(lines)participating in the regional trial performed better in terms of productivity and stability,with G07(0628),G02(0349-1)and 0429(G05),whose average yields were 15.6％,14.7％and 10.2％higher than the control'Kangqing3'(ck1)and 19.2％,18.2％and 13.6％higher than the control'Dulihuang'(ck2),respectively.Meanwhile,the analysis of the representativeness and discriminativeness of the five locations participating in the regional trial revealed that E3(Lintan County Agricultural and Forestry Workstation)and El(Gannan Institute of Agricultural Science)were the more ideal sites in this trial,with both good representativeness and discriminativeness.
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