剪秋罗（石竹科）中的干旱胁迫与近亲繁殖衰退

DROUGHT STRESS AND INBREEDING DEPRESSION IN LYCHNIS FLOS-CUCULI (CARYOPHYLLACEAE).

作者信息

Hauser Thure P, Loeschcke Volker

机构信息

Department of Ecology and Genetics, University of Aarhus, Ny Munkegade, Bygn. 540, Dk-8000, Aarhus C, Denmark.

出版信息

Evolution. 1996 Jun;50(3):1119-1126. doi: 10.1111/j.1558-5646.1996.tb02352.x.

DOI:10.1111/j.1558-5646.1996.tb02352.x

PMID:28565295

Abstract

Interactions between drought stress and inbreeding depression were studied in Lychnis flos-cuculi. Four inbreeding levels (F = 0, 0.25, 0.50 and 0.75), and three watering treatments were used. Performance was scored for germination rate and proportion, survival, plant size, proportion of plants flowering, flowering date, stem height, number of flowers, flower size, anther weight, fruiting proportion and number of capsules. Multiplicative fitness values were estimated from these traits. Inbreeding affected most of the traits studied, and a severe inbreeding depression was found for the combined fitness estimates. The higher inbreeding depression found here relative to the same family groups in a former experiment may reflect greater dominance and suppression in the present experiment at higher density.

摘要

在剪秋罗中研究了干旱胁迫与近亲繁殖衰退之间的相互作用。采用了四个近亲繁殖水平（F = 0、0.25、0.50和0.75）以及三种浇水处理方式。对发芽率和发芽比例、存活率、植株大小、开花植株比例、开花日期、茎高、花的数量、花的大小、花药重量、结果比例和蒴果数量等表现进行了评分。从这些性状估计了综合适应度值。近亲繁殖影响了所研究的大多数性状，并且在综合适应度估计中发现了严重的近亲繁殖衰退。相对于之前实验中的同一家族群体，这里发现的较高近亲繁殖衰退可能反映了在当前实验中更高密度下更大的显性和抑制作用。