Fragaria x ananassa
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Whole Genome Sequences & Annotations for Fragaria x ananassa
Fragaria x ananassa is the primary cultivated strawberry. It is an octoploid (2n=8x=56) that originated from a natural hybridization, believed to have originated in France, between the two octoploid species F. virginiana (North American origin) and F. chiloensis (South American origin). The estimated genome size of a diploid species, Fragaria vesca, is 240 Mb. Fragaria species grow as perennial crowns and can be propagated sexually by seed, and can also be propagated asexually as runners and crown divisions. Strawberry is used for its nutraceutical properties (fruit and leaf) as well as fresh fruit and processed fruit products. Plants are valued for landscaping and several non-fruiting varieties are available through plant nurseries. Focus of general breeding efforts include yield, flavor, fruit firmness, production timing and disease resistance. Whole genome assembly of F. x ananassa from a Japanese variety 'Reikou' (FAN_r1.1) bred in Chiba Prefecture, is available as well as a virtual 'reference genome', which integrates genome sequences of homeologous chromosomes, and was constructed by eliminating heterozygous bases during sequence assembly (FANhybrid_r1.2). Several linkage and quantitative trait locus (QTL) maps are available for the crop and some species. The diploid species, F. vesca, has been sequenced and the annotated genome is available through GDR.