自交衰退和自交后显性抑制竞争在油菜（甘蓝型油菜）中的表现。

Inbreeding depression and dominance-suppression competition after inbreeding in rapeseed (Brassica napus).

机构信息

Department of Ecology and Genetics, University of Aarhus, Denmark.

出版信息

Theor Appl Genet. 1994 Jun;88(3-4):321-3. doi: 10.1007/BF00223639.

Abstract

Rapeseed plants, of the summer annual variety Topas, that had been selfed twice consecutively were compared to outcrossed half-sibs for inbreeding depression in a rapeseed population at mating equilibrium. The effect of dominance-suppression competition was included in the effect of inbreeding. Both female-and male-fitness characters showed significant inbreeding depression. Biomass decreased 17% with inbreeding and was highly correlated with seed weight. The total number of flowers decreased 15% with inbreeding. There was a significant effect of lines. The possible importance of experimental design in studies that estimate inbreeding depression is discussed.

摘要

对连续自交两次的夏季一年生甘蓝型油菜品种 Topas 自交系与杂交半同胞进行了比较，以研究在交配平衡的油菜群体中自交衰退的情况。显性抑制竞争的影响包含在自交的影响中。无论是雌性还是雄性适合度特征都表现出显著的自交衰退。生物量随自交减少 17%，与种子重量高度相关。自交使花的总数减少了 15%。系的影响是显著的。讨论了在估计自交衰退的研究中实验设计的重要性。