中国芋属植物染色体数目及5个种的核型报道

Chromosome Numbers of Eight Colocasia Taxa and Karyotypes of Five Species Occurring in China

对中国 8种 (包括 1变种 )芋属 (ColocasiaSchott)植物的体细胞染色体数目和其中 5个种的核型进行了报道。结果分别为 :异色芋C heterochromaH .LietZ .X .Wei,2n =2x =2 8=1 8m +1 0sm ;龚氏芋C gongiiC .L .LongetH .Li,2n =2x =2 8=1 8m (4SAT ) +1 0sm(4SAT) ;贡山芋C gaoligongensisH .LietC .L .Long ,2n =2x =2 8=2 4m +4sm ;李氏香芋C lihengiaeC .L .LongetK .M .Liu ,2n =2x =2 8=1 8m (1SAT ) +6sm +4st;花叶芋C bicolorC .L .LongetL .M .Cao 2n =2 8;紫杆芋C lihengiaeC .L .LongetK .M .Liuvar.nigraC .L .Long 2n =3x =4 2 ;大野芋C gigantea (Bmume)Hookf.,2n =2x =2 8=2 2m +4sm +2st;山芋C konishiiHayata 2n =2 8。除李氏香芋、龚氏芋、大野芋和山芋外 ,其余染色体数目均为首次报道。在核型方面 ,异色芋、龚氏芋、李氏香芋。

The somatic chromosome numbers of eight Colocasia taxa and the karyotypes of five species in the genus from China are reported here.The results are as follows: C.heterochroma H.Li et Z.X.Wei,2n=2x=28=18m+10sm; C.gongii C.L.Long et H.Li,2n=2x=28=18m (4SAT)+10sm (4SAT); C.gaoligongensis H.Li et C.L.Long,2n=2x=28=24m+4sm; C.lihengiae C.L.Long et K.M.Liu,2n=2x=28=18m (1SAT)+6sm+4st; C.bicolor C.L.Long et L.M.Cao 2n=28; C.lihengiae C.L.Long et K.M.Liu var. nigra C.L.Long 2n=3x=42; C.gigantea (Blume) Hook f.,2n=2x=28=22m+4sm+2st; C.konishii Hayata 2n=28.Their somatic chromosome numbers are reported here for the first time except those of C.lihengiae,C.gongii,C.gigantea and C.konishii .The karyotypes of C.heterochroma,C.gongii,C.lihengiae and C.gaoligongensis are recorded here for the first time.