毛白杨种子胚根发育生根性状的遗传分析

Experiments were carried out by introspecific controlled crossing between a female Populus tomentosa Carr.(clone 5082) and male P.tomentosa Carr. var. truncata Y. C. Fu et C. H. Wang, var. nov. 3?193 seeds were obtained and then dibbled on 1/2 MS medium in vitro, and cultured by 25℃ light shining in 15 days. The rate of germination was 48.74%. Among them, there were 1?179 root seedlings and 376 non root seedlings. The segregation ratio of offspring (rooting∶non rooting ) was 3∶1 in Populus tomentosa and χ 2=0 557< χ 0 05 =3.84. The conclusion is that the rooting character is belonged to qualitative trait and controlled by a single complete dominant locus.