Two linked genes on rice chromosome 2 for F1 pollen sterility in a hybrid between Oryza sativa and O. glumaepatula

Mitsukazu Sakata, Yoshiyuki Yamagata, Kazuyuki Doi, Atsushi Yoshimura

研究成果: ジャーナルへの寄稿学術誌査読

12 被引用数 (Scopus)


Hybrid incompatibility plays an important role in establishment of post-zygotic reproductive isolation. To unveil genetic basis of hybrid incompatibilities between diverged species of genus Oryza AA genome species, we conducted genetic dissection of hybrid sterility loci, S22(t), which had been identified in backcross progeny derived from Oryza sativa ssp. japonica (recurrent parent) and South American wild rice O. glumaepatula near the end of the short arm of chromosome 2. The S22(t) region was found to be composed of two loci, designated S22A and S22B, that independently induce F1 pollen sterility. Pollen grains containing either of the sterile alleles (S22A-glums or S22B-glums) were sterile if produced on a heterozygous plant. No transmission of the S22A-glums allele via pollen was observed, whereas a low frequency of transmission of S22B-glums was observed. Cytological analysis showed that the sterile pollen grains caused by S22A could reach the bicellular or tricellular stage, and the nearly-sterile pollen grains caused by S22B could reach the tricellular stage. Our genetic analysis showed repulsion linkage effect is possible to induce strong reproductive barrier by high pollen sterility based on recombination value and transmission ratio of hybrid sterility gene to the progeny was influenced by frequency of competitors on fertilization.

ジャーナルBreeding Science
出版ステータス出版済み - 1月 10 2015

!!!All Science Journal Classification (ASJC) codes

  • 農業および作物学
  • 遺伝学
  • 植物科学


「Two linked genes on rice chromosome 2 for F1 pollen sterility in a hybrid between Oryza sativa and O. glumaepatula」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。