Genetic Analysis of Disease Resistance for Wheat Descendant Pyramid 3 Resistance-genes in Improved Varieties

doi:10.3321/j.issn:1000-7091.2007.02.039

Abstract

Abstract: In order to study the disease resistance displays of descendant of improved varieties, which pyramid different resistance-genes, compound hybridizes were adopted, and 3 Powdery mildew resistance genes which were Pm4b, Pm13 and Pm21 were pyramid and transferred, then to carried on artificial infection for F1 and F2, and investigated the phenotype disease resistance. The results showed as follows: the materials which included one of the 3 genes displays very strong resistance or immunity in F1 for F2, the biggest proportion of resistant plants was (Pm4b×Pm13)×Pm21 (71.82% ), followed by Pm13×Pm21 (66.67% ) and Pm4b×Pm21 (64.14% ), and the least resistant plants was Pm4b×Pm21 (63.93% ). In addition, the pyramiding materials with 2 resistance-genes, one of which was Pm21 gene showed stronger disease resistance.

Key words: Wheat, Powdery mildew, Gene pyramiding, Disease resistance, Genetic analysis

CLC Number:

S512.0

DONG Jian-li, WANG Jing-dong, HUI Hong-xia, ZHANG Zeng-yan. Genetic Analysis of Disease Resistance for Wheat Descendant Pyramid 3 Resistance-genes in Improved Varieties[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(2): 161-163. doi: 10.3321/j.issn:1000-7091.2007.02.039.

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