美洲黑杨×甜杨亲子无性系遗传参数估算

Estimation on the Genetic Parameters of Parent-offspring Clone(Populus deltoides‘Shan Hai Guan’×P. suaveolens Fisch)

利用甜杨种源内７个雄性个体分别同一雌性美洲黑杨杂交，对其杂种苗进行生长、分枝和物候特性等多个性状的遗传行为研究，同时，估测了亲本、家系和无性系各性状的遗传参数。结果表明，各种性状在亲本、家系（除分枝角外）和全同胞无性系间差异明显；亲本间的差异比家系间的大。各性状的广义遗传力均高而显著。生长性状间、物候性状间、物候期和生长性状间都存在着高度的遗传相关。在家系间，分枝角这一性状与其它性状是相互独立的，遗传相关程度很弱。在预见性育种时，可以在很大程度上根据亲本性状控制的遗传行为作为选择亲本的主要依据。

A factorial crossing design with 7 males(P. suaveolens Fisch.of the sameprovenance)and 1 female(P. deltoideg‘Shan Hai Guan')was made.Observations are con-cerned with phenology,growth and branch angle. The results showed there was a significantvariability among most of the traits of the parents,families or cloned full-sides;but thisvariability was greater among parents than among families. In a broad sense,heritabilitieswere generally high and significant for all types of traits. Significant values were foundamong phenology traits,growth traits and between phenology and growth traits.