Journal
SCIENCE
Volume 346, Issue 6209, Pages 646-650Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1257225
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Funding
- Japan Society for the Promotion of Science (JSPS)
- JSPS [26712005, 26660025]
- University of California Davis Genome Center seed grant
- Office of Science (Biology and Environmental Research) of the U.S. Department of Energy [DE-SC0007183]
- BioProject [PRJNA261435]
- Transcriptome Shotgun Assembly (TSA) project [GBSJ00000000]
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [1457230] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [26712005, 26660025] Funding Source: KAKEN
- U.S. Department of Energy (DOE) [DE-SC0007183] Funding Source: U.S. Department of Energy (DOE)
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In plants, multiple lineages have evolved sex chromosomes independently, providing a powerful comparative framework, but few specific determinants controlling the expression of a specific sex have been identified. We investigated sex determinants in the Caucasian persimmon, Diospyros lotus, a dioecious plant with heterogametic males (XY). Male-specific short nucleotide sequences were used to define a male-determining region. A combination of transcriptomics and evolutionary approaches detected a Y-specific sex-determinant candidate, OGI, that displays male-specific conservation among Diospyros species. OGI encodes a small RNA targeting the autosomal MeGI gene, a homeodomain transcription factor regulating anther fertility in a dosage-dependent fashion. This identification of a feminizing gene suppressed by a Y-chromosome-encoded small RNA contributes to our understanding of the evolution of sex chromosome systems in higher plants.
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