| Budget Amount *help |
¥12,740,000 (Direct Cost: ¥9,800,000、Indirect Cost: ¥2,940,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2015: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
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| Outline of Final Research Achievements |
Spinach is commonly known as a dioecious species. However, certain lines and crosses produce monoecious individuals. Dioecism and monoecism are of relevance in commercial hybrid seed production, and elucidation of the mechanisms underlying sex determination is valuable for spinach breeding programs. Sex expression in dioecious spinach plants is controlled by a single gene pair termed X and Y. Meiotic recombination was found suppressed in the vicinity of the male-determining locus (Y). A locus controlling the monoecious condition (M) is linked to X/Y locus at 12 cM.
In this study, we identified 220 genes linked to X/Y locus, part of which were found to be located in the recombinationally suppressed region. The locus for monoecism was confined to a 25-kbp chromosomal segment.
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