Chromosome Location of Resistance Gene to Powdery Mildew in New Wheat Germplasm N95175

doi:10.7668/hbnxb.2010.01.043

Abstract

Abstract: Powdery mildew,caused by Blumeria graminis f.sp.tritici,is one of the devastating diseases in most wheat-growing areas worldwide.New wheat germplasm N95175 is immune to powdery mildew.Genetic analysis of powdery mildew resistance of N95175 at seedling stage was done in order to locate the resistant gene on wheat chromosome.F₁ progeny between N95175 and four highly susceptible common wheat cultivars were highly resistant to powdery mildew,the ratio of the resistant and susceptible plants in F₂ progeny fitted the expected 3 to 1.All of F₁ generation between a set of highly susceptible common wheat nullisomic lines or monosomic lines and N95175 were highly resistant to powdery mildew,the ratio of the resistant and susceptible plants in(Abbondanza 6AN/N95175) F₂ progeny deviated from the expected 3 to 1,and F₂ progeny of the other 20 crosses fitted the expected 3 to 1.The results indicated that powdery mildew resistance of N95175 at seedling stage was controlled by a single dominant gene located on chromosome 6A.

Key words: Common wheat, Gene resistant to powdery mildew, Chromosome location

CLC Number:

S435.12

WANG Chang-you1,WANG Qiu-ying1,LIU Zhi-li2,ZHANG Hong1,WANG Ya-juan1,LIU Xin-lun1,JI Wan-quan1. Chromosome Location of Resistance Gene to Powdery Mildew in New Wheat Germplasm N95175[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(1): 213-216. doi: 10.7668/hbnxb.2010.01.043.

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