title: Mitochondrial gene in the nuclear genome induces reproductive barrier in rice.
abstract: Hybrid incompatibility in F(1) hybrids or later generations is often observed as sterility or inviability. This incompatibility acts as postzygotic 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.
authors.affiliation: Faculty of Agriculture, Kyushu University, Hakozaki, Higashi, Fukuoka 812-8581, Japan.
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Yamagata
authors.forename: Eiji
authors.initials: E
authors.lastname: Yamamoto
authors.forename: Kohichiro
authors.initials: K
authors.lastname: Aya
authors.forename: Khin Thanda
authors.initials: KT
authors.lastname: Win
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Doi
authors.lastname: Sobrizal
authors.forename: Tomoko
authors.initials: T
authors.lastname: Ito
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kanamori
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Wu
authors.forename: Takashi
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Makoto
authors.initials: M
authors.lastname: Matsuoka
authors.forename: Motoyuki
authors.initials: M
authors.lastname: Ashikari
authors.forename: Atsushi
authors.initials: A
authors.lastname: Yoshimura
mesh_terms: D000483:Alleles; D002467:Cell Nucleus / Q000235:genetics*; D018506:Gene Expression Regulation, Plant; D050259:Genes, Mitochondrial; D014644:Genetic Variation; D018745:Genome, Plant; D008854:Microscopy, Electron; D008969:Molecular Sequence Data; D012275:Oryza / Q000235:genetics* / Q000254:growth & development / Q000648:ultrastructure; D051479:Plant Infertility; D011058:Pollen / Q000235:genetics* / Q000254:growth & development / Q000648:ultrastructure