A Study on Variation of Resistance to Powdery Mildew in Wheat Induced by Barley Exogenous DNA

doi:10.3321/j.issn:1000-7091.1992.02.007

Abstract

Abstract: The appearance of resistance, yield composition, grain coarse protein and amino acid contents were studied for variants showing resistance to powdery mildew in the, D₁, D₂, D₃ generations in different conditions after the introduction of barley DNA into wheat variety. The results indicated that different types of variation(e. g. resistance to powdery mildew) appeared in the D₁, generation after the introduction of barley DNA into wheat variety. The immune and high resistant variants accounted for 2.77%, and the resistance could be passed down to their posterity. Under field and green, house conditions, 5 lines showed stable resistance and 8 line segregated in D₂, one of which maintained steady resistance in D₂, D₃. In D₂, the content of grain coarse protein of two stable lines(D₂-20, D₂-29) increased by 20.3% and 15.76% resp. and the total content of 17 amino acid increased by 23.4% and 27.5% resp. Similar results were obtained in greenhouse conditions.

Key words: Exogenous DNA introduction, Wheat, Powdery mildew, Amino acid, Variation

Yan Xinfu, Liu Wenxuan, Wang Shengjun, Hu Xueyi, Wang Xicheng. A Study on Variation of Resistance to Powdery Mildew in Wheat Induced by Barley Exogenous DNA[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1992, 7(2): 40-45. doi: 10.3321/j.issn:1000-7091.1992.02.007.

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