Role of maternal tissues in qLG-9 control of seed longevity in rice (Oryza sativa L.)

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概要

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• We examined the role of the hull, seed coat and embryo in the effect of qLG-9, as a first step to elucidate the mechanism(s) responsible for seed longevity in rice. The effects of the other proposed QTLs for seed longevity, qLG-2 and qLG-4, were also investigated. We used chromosome segment substitution lines (CSSLs) derived from a cross between a japonica variety (Koshihikari) and an indica variety (Kasalath) to isolate each QTL. To examine the seed longevity, a germination test was performed after an aging treatment. Both in unhulled and hulled seeds, qLG-9 (located on chromosome 9) increased the seed longevity, unlike qLG-2 and qLG-4 (located on chromosomes 2 and 4, respectively). A germination test using unhulled seeds of the reciprocal crosses between Koshihikari and SL226, the CSSL harboring qLG-9, failed to reveal a maternal effect from the hull or seed coat on the longevity. Thus, it was assumed that the increased seed longevity conferred by qLG-9 was associated primarily with embryonic and/or endospermic factors.

• 日本育種学会の論文

著者

• Miura Kiyoyuki

  National Agricultural Research Center

• Shigemune Akiko

  National Agricultural Research Center

• Sasahara Hideki

  National Agricultural Research Center

• Goto Akitoshi

  National Agricultural Research Center

• Yoshida Tomohiko

  Utsunomiya University

関連論文

• Introduction of the Long-Coleoptile Trait to Improve the Establishment of Direct-Seeded Rice in Submerged Fields in Cool Climates
• Mapping Quantitative Trait Loci Controlling Low Temperature Germinability in Rice(Oryza sativa L.)
• Role of maternal tissues in qLG-9 control of seed longevity in rice (Oryza sativa L.)

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