Sex determination and sex ratio in the dioecious shrub Salix viminalis L
Sex determination and sex ratio in the dioecious shrub Salix viminalis L
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DOI：
10.1007/s001220050442
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发表时间：
1997-03-01
影响因子：
5.4
通讯作者：
Gullberg, U
中科院分区：
文献类型：
--
作者：
AlstromRapaport, C;Lascoux, M;Gullberg, U
各种生态因素（如草食动物，男性和女性之间的殖民能力的差异）已被援引来解释女性偏向性比的杨柳物种的种群。人们含蓄地假定，在没有生态干扰的情况下，遗传因素将导致性别比例平衡。在无食草动物的均匀环境中，对13个篮杨柳（Salix viminalis L.）从极端女性偏见到极端男性偏见。如果不假设额外的基因座也参与性别决定，则无法用性染色体的存在来解释观察到的性别比。另外，在这项研究中的性别比例可以解释由多个独立的基因座的性别决定机制。
Various ecological factors (e.g. herbivory, difference between males and females in colonising ability) have been invoked to explain female-biased sex ratios in populations of willow species. It was implicitly assumed that genetic factors would lead to a balanced sex ratio in the absence of ecological disturbances. In an experiment carried out in a homogeneous environment and in the absence of herbivores the progeny sex ratio of 13 crosses of basket willow (Salix viminalis L.) was observed to range from extreme female bias to extreme male bias. The observed sex ratio cannot be explained by the presence of sex chromosomes without assuming that additional loci are also involved in the sex determination. Alternatively, the sex ratios in this study can be explained by a sex determination mechanism governed by multiple independent loci.