摘要
对我国杨属 (Populus)青杨组 (Tacamahaca)的 10个种 (包括品种 )的核型进行了比较研究 ,结果如下 :小青杨P pseudo simoniiKitag .,2n =38=2 7m +6sm (1SAT ) +4st (2SAT )+1t (1SAT) ;毛果杨P trichocarpaTorr .,2n =38=2M +18m (1SAT ) +8sm +10st (1SAT) ;北京青杨P cathayanaRehd .var.Beijing ,2n =38=1M +2 4m +6sm +7st (2SAT) ;群众杨P בpopularis’ ,2n =38=3M +2 7m +2sm (1SAT ) +4st (2SAT ) +2t (1SAT) ;合作杨P ×xi aozhuanicaW .Y .HsuetLiangcv .Opera ,2n =38=1M +2 9m +4sm +5st;五台青杨P cath ayanaRehd .var .Wutai,2n =38=5M +2 2m +4sm +5st +2t (2SAT) ;甘肃青杨P cathayanaRehd .var.Gansulinxiaman ,2n =38=2M +2 8m +1sm +7st (1SAT) ;青海青杨P cathayanaRe hd .var.Qinghai,2n =38=1M +2 7m +3sm +6st (3SAT ) +1t (1SAT) ;中青 10号P cath .×Zhongqingnensis 10 ,2n =38=1M +2 6m +4sm +5st (2SAT ) +2t (2SAT) ;中青 4 8号P cath .×Zhongqingnensis 4 8,2n =38=16m +10sm (1SAT ) +10st (2SAT ) +2t (1SAT)。青杨组种间核型有一定区别 ,大部分种 (品种 )的核型均由中部和近中部着丝点染色体组成 ,少数种具端着丝点染色体 ,按Stebbins的核型分类 ,青杨组均属于
The paper identified and compared the karyotypes of 10 species(varieties) of Populus sect.Tacamhaca.The results were as follows:P.pseudo-simonii Kitag.2n=38=27m+6sm(1SAT)+4st(2SAT)+1t(1SAT);P.trichocarpa Torr.2n=38=2M+18m(1SAT)+8sm+10st(1SAT);P.cathayana Rehd.var.Beijing 2n=38=1M+24m+6sm+7st(2SAT);P.בpopularis’ 2n=38=3M+27m+2sm(1SAT)+4st(2SAT)+2t(1SAT);P.cathayana Rehd.var.Wutai 2n=38=5M+22m+4sm+5st+2t(2SAT);P.cathayana Rehd.var.Gansulinxiaman 2n=38=2M+28m+1sm+7st(1SAT);P.cathayana Rehd.var.Qinghai 2n=38=1M+27m+3sm+6st(3SAT)+1t(1SAT);P.cathayana×Zhongqing 10 2n=38=1M+26m+4sm+5st(2SAT)+2t(2SAT);P.cathayana×Zhongqing 48 2n=38=16m+10sm(1SAT)+10st(2SAT)+2t(1SAT).The results showed definite karyotype differences among the species of Tacamhaca.The karyotypes of most species(varieties) are made of m and sm and a few with st and t chromosomes.The karyotypes of Tacamhaca were all of 2B type of Stebbins.This study provided important basic data for taxon of Populus.
出处
《云南植物研究》
CAS
CSCD
北大核心
2004年第5期537-542,共6页
Acta Botanica Yunnanica
基金
国家"973"项目"树木育种的分子基础研究" (G19990 16 0 0 3)
国家林业局"94 8"项目"国外白杨
胡杨新品种及抗干旱基因与转化技术引进" (98- 4 - 0 4 - 0 2 )
山西省自然科学基金项目资助
关键词
杨属
青杨组
品种
核型
染色体
Populus
Sect.Tacamhaca
Karyotype analysis
