杨属白杨组种间核型比较

Karyotype Analysis of Section Populus in Populus

对杨属(Populus)白杨组(SectionPopulus)9种核型进行了分析,结果如下:银白杨(P.albaL.),2n=28=1M+30m+4sm(1SAT)+1st(1SAT)+2t;新疆杨(P.albavar.pyramidalis),2n=38=1M+24m+6sm+5st(1SAT)+2t(1SAT);河北杨(P.hopeiensisHuetChow),2n=38=1M+25m+8sm+4st;毛白杨(P.tomentosaCarr),2n=38=1M+27m+2sm+6st+2st;欧洲山杨(P.tremulaL.),2n=38=27m(1SAT)+6sm+5st(2SAT);银新杨(P.albabolleana),2n=38=1M+24m+7sm(1SAT)+5st(1SAT)+1t;鄂西毛白杨(P.tomentosavar.Exi),2n=38=26m+5sm+4st+3t;喇叭1号(P.da-vidianaDodeCLalba-1),2n=38=3M+23m(1SAT)+6sm+6st(1SAT),B14杨(P·×ZhongbainensisB14),2n=38=22m+6sm(1SAT)+7st+3t。白杨组种间核型有显著差异,说明它们的起源各异,其核型特征为白杨组种间鉴定提供了参考依据。

The karyotype of 9 species （varieties） of section Populus in the genus Populus have been analyzed for the first time. The results were as follows： P. alba L. , 2n =28 = 1M ＋30m ＋4sm （1SAT） ＋ 1st （1SAT）＋2t; P. alba L. var. pyramidalis, 2n=38=1M＋24m＋6sm＋5st （1SAT） ＋2t （1SAT）; P. hopeiensis Hu et Chow, 2n=38 = 1M ＋25m ＋8sm ＋4st; P. tomentosa Carr. , 2n =38 = 1M ＋27m ＋2sm ＋6st ＋2st; P. tremula L. , 2n =38 =27m （1SAT） ＋6sm ＋5st （2SAT） ; P. alba bolleana, 2n =38 = 1M ＋24m ＋7sm （1SAT） ＋5st （1SAT） ＋It; P. tomentosa var. Exi, 2n =38 =26m ＋5sm＋4st ＋3t; P. davidiana Dode CL alba-1, 2n =38 =3M ＋23m （1SAT） ＋6sm ＋6st （1SAT） ; P. ×Zhongbainensis B14, 2n =38 = 22m ＋ 6sm （1SAT） ＋7st ＋ 3t. Results of karyotype analysis showed that the karyotype differences among species （varieties） in section Populus were remarkable. The results obtained indicated that their origin were different. The karyotype characteristics provided important basic data for species of section Populus.