Polyploidy is a common phenomenon among willow species.In this study,genome sequencing was conducted for Salix matsudana Koidz(also named Chinese willow),an important greening and arbor tree species,and the genome of ...Polyploidy is a common phenomenon among willow species.In this study,genome sequencing was conducted for Salix matsudana Koidz(also named Chinese willow),an important greening and arbor tree species,and the genome of this species was compared with those of four other tree species in Salicaceae.The total genome sequence of S.matsudana was 655.72 Mb in size,with repeated sequences accounting for 45.97%of the total length.In total,531.43 Mb of the genome sequence could be mapped onto 38 chromosomes using the published genetic map as a reference.The genome of S.matsudana could be divided into two groups,the A and B genomes,through homology analysis with the genome of Populus trichocarpa,and the A and B genomes contained 23,985 and 25,107 genes,respectively.4DTv combined transposon analysis predicted that allotetraploidy in S.matsudana appeared~4 million years ago.The results from this study will help reveal the evolutionary history of S.matsudana and lay a genetic basis for its breeding.展开更多
基金supported by the National Natural Science Foundation of China(31971681)Jiangsu Province Forestry Science and Technology Innovation and Promotion Project(LYKJ[2018]36)Nantong University Scientific Research Start-up Project for Introducing Talents(18R08).
文摘Polyploidy is a common phenomenon among willow species.In this study,genome sequencing was conducted for Salix matsudana Koidz(also named Chinese willow),an important greening and arbor tree species,and the genome of this species was compared with those of four other tree species in Salicaceae.The total genome sequence of S.matsudana was 655.72 Mb in size,with repeated sequences accounting for 45.97%of the total length.In total,531.43 Mb of the genome sequence could be mapped onto 38 chromosomes using the published genetic map as a reference.The genome of S.matsudana could be divided into two groups,the A and B genomes,through homology analysis with the genome of Populus trichocarpa,and the A and B genomes contained 23,985 and 25,107 genes,respectively.4DTv combined transposon analysis predicted that allotetraploidy in S.matsudana appeared~4 million years ago.The results from this study will help reveal the evolutionary history of S.matsudana and lay a genetic basis for its breeding.
