GS3 participates in stigma exsertion as well as seed length in rice

Noriko Takano-Kai, Kazuyuki Doi, Atsushi Yoshimura
Breeding Science, 2011, 61(3): 244-250  DOI: 10.1270/jsbbs.61.244     追溯原文......本站官方QQ群:62473826
GRAIN SIZE 3 (GS3) gene; stigma exsertion; stigma length; cell number; hybrid rice

Stigma exsertion is an important trait that contributes to the improvement of seed production in hybrid rice. We demonstrate that GS3, one of the genes regulating seed length, also regulates stigma length and participates in stigma exsertion in rice. GS3 mRNA is expressed in the basal part of the young stigma, and a nonsense mutation in the second exon of GS3 causes an increase in cell number, resulting in elongation of the stigma. Manipulation of GS3 should contribute to the improvement of hybrid seed-production efficiency.

水稻中GS3与柱头外露率和种子长度有关

柱头外露率是一个重要的能提高杂交制种中种子生产的性状。本文中我们证明了GS3是一个在水稻中调控种子长度和柱头长度,与柱头外露率有关。GS3 的mRNA在幼嫩的柱头的基部中表达,GS3的第二个外显子中的一个无义突变使细胞数目的增加,最终导致柱头的伸长。GS3的操纵应提高杂交制种中种子的生产效率。
结果:Asominori和AIS22柱头的比较;互补实验;GS3在雄蕊中的表达;GS3减少柱头细胞数目


本文涉及的功能基因
  粒长粒重主效控制基因 GS3