Whole genome sequencing of a wild yam species Dioscorea tokoro reveals a genomic region associated with sex
Natsume, S.; Yaegashi, H.; Sugihara, Y.; Abe, A.; Shimizu, M.; Oikawa, K.; White, B.; Kudoh, A.; Terauchi, R.
Show abstract
Dioscorea tokoro is a wild species distributed in East Asia including Japan. Typical of the genus Dioscorea, D. tokoro is dioecious with male and female flowers borne on separate individuals. To understand its sex determination system and to serve as a model species for population genomics of obligate outcrossing wild species, we set out to determine the whole genome sequence of the species. Here we show 443 Mb genome sequence of D. tokoro distributed over 2,931 contigs that were anchored on 10 linkage groups. Linkage analysis of sex in a segregating F1 family revealed a sex determination locus residing on Pseudochromosome 3 with XY-type male heterogametic sex determination system.
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