Mitochondrial gene in the nuclear genome induces reproductive barrier in rice

作者：Yamagata Yoshiyuki; Yamamoto Eiji; Aya Kohichiro; Win Khin Thanda; Doi Kazuyuki; Sobrizal; Ito Tomoko; Kanamori Hiroyuki; Wu Jianzhong; Matsumoto Takashi; Matsuoka Makoto; Ashikari Motoyuki; Yoshimura Atsushi^*

来源：Proceedings of the National Academy of Sciences, 2010, 107(4): 1494-1499.

DOI：10.1073/pnas.0908283107

• F(1) pollen sterility
• gene duplication
• BDM incompatibility
• mitochondrial ribosomal protein

Hybrid incompatibility in F(1) hybrids or later generations is often observed as sterility or inviability. This incompatibility acts as post-zygotic reproductive isolation, which results in the irreversible divergence of species. Here, we show that the reciprocal loss of duplicated genes encoding mitochondrial ribosomal protein L27 causes hybrid pollen sterility in F(1) hybrids of the cultivated rice Oryza sativa and its wild relative O. glumaepatula. Functional analysis revealed that this gene is essential for the later stage of pollen development, and distribution analysis suggests that the gene duplication occurred before the divergence of the AA genome species. On the basis of these results, we discuss the possible contribution of the "founder effect" in establishing this reproductive barrier.

• 出版日期2010-1-26