Mapping of Quantitative Trait Loci Conferring Resistance to Barley Yellow Mosaic Virus in a Chinese Barley Landrace Mokusekko 3

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概要

• 論文の詳細を見る

• A Chinese six-rowed barley landrace, Mokusekko 3, exhibits a wide resistance spectrum to all the barley yellow mosaic virus strains in Japan(BaYMV-I, -II, -III)and in Europe(BaYMV-1, -2)as well as to barley mild mosaic virus(BaMMV). To identify the genetic basis for the resistance to BaYMV, a cross between a Japanese malting barley cultivar Ko A(susceptible)and Mukosekko 3 was made to generate F_2 and F_3 populations. The reaction of the F_2-derived F_3 lines to BaYMV was investigated in a field infected with BaYMV(-I or both -I and -II)during two growing seasons, 1996 and 1997. BaYMV disease severity of the F_2 individuals was quantitatively expressed as the percentage of the susceptible seedlings within the F_3 line. For the linkage analysis along the whole chromosome, a map of the barley genome consisting of 100 markers was used. The map covers 1291 cM with an average density of 14 cM. The interval mapping method was used to identify the quantitative trait loci(QTLs)for resistance to BaYMV. A new QTL for resistance to the BaYMV was located in the terminal region of chromosome 7HS, explaining 20-25% of the phenotypic variance, in addition to those in the terminal region of chromosome 3HL and centromeric region of chromosome 4H. The three QTLs accounted for 55-57% of the total phenotypic variance. The location of the QTLs on chromosomes 4H and 3HL corresponded well to that of rym1 and rym5 which were previously mapped for resistance to BaYMV in Mokusekko 3 using morphological and isozyme markers. Based on these results, the effect of pyramiding of these resistance factors into modern barley cultivars by marker-assisted selection is was examined.

• 日本育種学会の論文

著者

• SAITO Akira

  National Institute of Agrobiological Resources

• Ito Kazutoshi

  Biotechnology Department Sapporo Breweries Ltd.

• Sato K

  Barley And Wild Plant Resource Center Research Institute For Bioresources Okayama University

• Sato Kazuhiro

  Barlery Germplasm Center Research Institute For Bioresources Okayama University

• Konishi Takeo

  294 Okada Mabi Okayama 710-1311 Japan

• Saeki Kazuo

  Biotechnology Department Sapporo Breweries Ltd.

• Miyazaki Chikara

  Nagasaki Laboratory, Japan Science and Technology Corporation

• Osanai Eiichi

  Technology Development Department, Kirin Brewery Co. Ltd.

• Miyazaki C

  Kyusyu Agricultural Experimental Station Kumamoto Jpn

• Osanai Eiichi

  Technology Development Department Kirin Brewery Co. Ltd.

• Saito Akira

  National Agricultural Research Center For Kyushu Okinawa Region

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