| Analysis on high yield and stability of winter wheat cultivars in dryland of east Gansu by AMMI model |
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| DOI：10.7606/j.issn.1000-7601.2009.03.08 |
| Key Words: winter wheat genotype-environment interaction AMMI model adaptability Longdong dryland |
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| Abstract: |
| To evaluate high yield and stability characters of winter wheat cultivars under different ecological conditions in dry land, the yield data of 11 winter wheat genotypes at 6 sites grown in winter wheat regional trial of east Gansu Province were used for AMMI model analysis in 2005～2006.The average yield ranged from 2 354.56 kg/hm2 to 5 045.47 kg/hm2 in 6 sites, and cultivars (lines) ranged from 2 994.80～3 756.68 kg/hm2.Highly significant variations existed in genotypes, environments and GEI.The three variances were 5.19%, 79.45% and15.36% of total variance.The results showed that the environment and the GEI had greater effects on yield than genotypes.IPCA1, IPCA2 and IPCA3 accounted for 88.20% of total GEI variance.Based on calculation of genotype stability parameter (D (subscript i) ) and site discrimination parameter (D (subscript i) ) by using principal component analysis, the results showed that the difference of D (subscript i) among the genotypes was up to 8.09 times;Genotypes Longjian 386, Ningmai No.5 and Longyu 216 had high and stabile yield.Kangzhuang 891, Jin 9717 and Longyuan 031 were low in yield and stability.The resolving ability of sites was high in Jingchuan and Lingtai but low in Xifeng and Zhenyuan.Lingxuan No.3 had specific adaptability in Jingchuan, Lingtai and Pingliang;Longmai 977 had specific adaptability in Jinchuan and Jingning;These cultivars can be widely planted in certain dryland. |
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