Sequence divergence at chalcone synthase gene in pigmented seed coat soybean mutants of the Inhibitor locus

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概要

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• Seed coat color in soybeans is determined by the I (Inhibitor) locus. The dominant I allele inhibits seed coat pigmentation, and it has been suggested that there is a correlation between the inhibition of pigmentation by the I allele and chalcone synthase (CHS) gene silencing in the seed coat. Analysis of spontaneous mutations from I to i has shown that these mutations are closely related to the deletion of one of the CHS genes (designated ICHS1). In soybeans with the I/I genotype (cv. Miyagi shirome), a truncated form of the CHS gene (CHS3) is located in an inverse orientation 680 bp upstream of ICHS1, and it was previously suggested that the truncated CHS3- ICHS1 cluster might be involved in CHS gene silencing in the seed coat. In the current study, the truncated CHS3- ICHS1 cluster was compared with the corresponding region of pigmented seed coat mutants in which I had changed to i in Miyagi shirome and in the strain Karikei 584. In the Karikei 584 mutant, the truncated CHS3-ICHS1 cluster was retained and the sequence diverged at a point immediately upstream (32 bp) of this cluster. The sequences upstream of the points of divergence in both mutants almost perfectly matched a part of the registered sequence in a soybean BAC clone containing the soybean cyst nematode resistance-associated gene, and inspection of the sequences suggested that the sequence divergence of the CHS gene in the Karikei 584 and Miyagi shirome mutants was due to an unequal crossing-over via 4-bp or 5-bp short repeats, respectively.

• 日本遺伝学会の論文
• 2002-10-01

著者

• Akada S

  Gene Research Center Hirosaki University

• Senda M

  Gene Research Center Hirosaki University

• Akada Shinji

  Hirosaki University Faculty Of Agriculture And Life Science

• Kasai Atsushi

  Gene Research Center Hirosaki University

• Kasai Atsushi

  Laboratory Of Ecological Information Graduate School Of Agriculture Kyoto University

• Ishikawa R

  Faculty Of Agriculture And Life Science Hirosaki University

• Ishikawa Ryuji

  Hirosaki University

• Shimamoto Y

  Laboratory Of Industrial Crops Faculty Of Agriculture Hokkaido University

• Harada T

  Faculty Of Agriculture And Life Science Hirosaki University

• Niizeki Minoru

  Faculty of Agriculture and Life Science, Hirosaki University

• Yumoto Setsuzo

  Tokachi Agricultural Experiment Station

• SENDA Mineo

  Gane Research Center, Hirosaki University

• KASAI Atsushi

  Gane Research Center, Hirosaki University

• AKADA Shinji

  Gane Research Center, Hirosaki University

• ISHIKAWA Ryuji

  Laboratory of Plant Breeding and Genetics, Faculty of Agriculture and Bioscience, Hirosaki Universit

• HARADA Takeo

  Laboratory of Plant Breeding and Genetics, Faculty of Agriculture and Bioscience, Hirosaki Universit

• NIIZEKI Minoru

  Laboratory of Plant Breeding and Genetics, Faculty of Agriculture and Bioscience, Hirosaki Universit

• Niizeki M

  Faculty Of Agriculture And Life Science Hirosaki University

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