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 obtain...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.展开更多
文摘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.
