三倍体杨树核型分析

The Karyptype Analysis of Triploid Poplar

摘要: 对4种三倍体杨树核型进行了比较分析,三倍体毛白杨核型为:2n=3x=57=1M+31m+10sm+15st;三倍体I-214为:2n=3x=57=2M+33m(2SAT)+10sm(1SAT)+10st(3SAT)+2t;三倍体武黑1号为:2n=3x=57=2M+38m(4SAT)+14sm(2SAT)+3st;三倍体廊坊3号为:2n=3x=57=35m+10sm(1SAT)+10st(2SAT)+2t(1SAT)。结果显示三倍体毛白杨核型与三倍体黑杨核型有显著不同,表明它们的基因组结构不同,起源各异。

Abstract: This paper analyzed the karyotypes of 4 species of triploid poplar. The results were as follows: Populus tomentosa, 2n=3x=57=1 M+31 m+10 sm+15 st; P.×euramericana cv. ’I-214’, 2n=3x=57=2 M+33 m(2 SAT)+10 sm(1 SAT)+10 st(3 SAT)+2 t; P. euramericana cv. Wuhei-1, 2n=3x=57=2 M+38 m(4 SAT)+14 sm(2 SAT)+3 st; P. shanhaiguanensis×(P. simonii×P. pyramidalis-12+Ulmus pumila), 2n =3x=57=35 m+(10 sm)(1 SAT)+(10 st)(2 SAT)+2 t(1 SAT). The results of karyotype analysis showed significant differences between species in triploid P. tomentosa and P.×euramericana. This indicated that their geneone structure and origin were different. This study provided valuable reference for the research of origin and evolution of triploid poplar.