Linkage analysis of a dominant resistance gene to the entomopathogenic fungus Beauveria brongniartii in the silkworm, Bombyx mori

DOI Web Site 参考文献10件
  • Wada Sanae
    National Institute of Agrobiological Sciences, Tsukuba Department of Bioregulation and Biointeraction, Graduate School of Agriculture, Tokyo University of Agriculture and Technology
  • Mikuni Tatsuo
    National Institute of Agrobiological Sciences, Tsukuba
  • Atsumi Shogo
    Ishihara Sangyo Kaisha, LTD National Institute of Agrobiological Sciences, Tsukuba
  • Mitsuhashi Wataru
    National Institute of Agrobiological Sciences, Tsukuba
  • Narukawa Junko
    National Institute of Agrobiological Sciences, Tsukuba
  • Kadono-Okuda Keiko
    National Institute of Agrobiological Sciences, Tsukuba
  • Yamamoto Kimiko
    National Institute of Agrobiological Sciences, Tsukuba
  • Mita Kazuei
    National Institute of Agrobiological Sciences, Tsukuba
  • Noda Hiroaki
    National Institute of Agrobiological Sciences, Tsukuba
  • Miyamoto Kazuhisa
    National Institute of Agrobiological Sciences, Tsukuba
  • Kunimi Yasuhisa
    Department of Bioregulation and Biointeraction, Graduate School of Agriculture, Tokyo University of Agriculture and Technology

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  • Linkage analysis of a dominant resistance gene to the entomopathogenic fungus <i>Beauveria brongniartii</i> in the silkworm, <i>Bombyx mori</i>

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説明

Resistance to the entomopathogenic fungus Beauveria brongniartii (Sacc.) is controlled by a dominant gene in the silkworm, Bombyx mori (Linnaeus) (Lepidoptera: Bombycidae). We determined the linkage group by which the resistance gene links through linkage analysis with the linkage map of the silkworm based on single nucleotide polymorphisms (SNPs). Taking advantage of the lack of crossing over in females of the silkworm, backcrossed F1 progenies (BC1) made by crossing an F1 female (susceptibility-developed strain AkakoS×resistance-developed strain p50TR) and a male AkakoS were used. The resistant BC1 individuals were selected by screening of injection with conidial suspension of B. brongniartii. We selected SNP markers that were able to distinguish the genotypes of AkakoS and p50TR on each of the 28 linkage groups and analyzed the genotypes of the resistant BC1 individuals on each linkage group with the SNP markers. There are two genotypes in BC1, homo (AkakoS) type and hetero (F1) type, but only hetero type BC1 individuals can be resistant to B. brongniartii on the linkage group to which the resistance gene links. All resistant BC1 individuals showed hetero type only at the 14th linkage group, suggesting that the resistance gene of the silkworm to B. brongniartii exists on the 14th linkage group. We designated this gene as “resistant to B. brongniartii” with the abbreviation Rbbr.<br>

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