The relationship between seedling survival rates and their genetic relatedness to neighboring conspecific adults
The relationship between seedling survival rates and their genetic relatedness to neighboring conspecific adults
复制标题
幼苗存活率与其与邻近同种成虫的遗传相关性之间的关系
DOI：
10.1007/s11258-016-0591-z
复制
发表时间：
2016
期刊：
影响因子：
1.7
通讯作者：
Sakamoto K
中科院分区：
文献类型：
--
作者：
Akaji Y;Miyazaki Y;Hirobe M;Makimoto T;Sakamoto K
当寄主基因型对幼苗的危害程度不同时，幼苗基因型是影响幼苗存活的主要因素之一。然而，据我们所知，在考虑到幼苗基因型的种内变异的情况下，没有先前的研究检查过与同种成虫相邻的幼苗的死亡率。在假设天敌适应具有独特基因型的成年树的基础上，我们通过测量生长在日本寒温带森林中的agus crenata幼苗的死亡率，验证了与邻近成年树遗传关系更密切时幼苗存活率降低的假设。我们估计了幼苗（2岁和6岁）与邻近成虫的遗传亲缘关系。赤霉素微卫星分析及幼苗成活率测定。在2岁的幼苗群体中，幼苗存活率与遗传相关性之间存在不显著的负相关，而在6岁的幼苗群体中存在不显著的正相关。我们的研究结果要求进一步研究幼苗存活率与邻近成虫遗传亲缘关系之间的潜在关系。
Seedling genotype is one of the major factors affecting seedling survival when the rate of damage by natural enemies depends on a host genotype. However, to our knowledge, no previous study has examined the mortality of seedlings adjacent to conspecific adults, considering intraspecific variation in seedling genotypes. On the basis of the assumption that natural enemies adapt to adult trees having a unique genotype, we tested the hypothesis that seedling survival decreases when they are more closely genetically related to neighboring adults, by measuring the mortality rate of seedlings ofFagus crenatagrowing in a cool-temperate forest in Japan. We estimated the genetic relatedness of seedlings (2 and 6 years old) to the neighboring adultF. crenatausing microsatellite analysis and measured seedling survival. We determined that there was a non-significant negative correlation between seedling survival and genetic relatedness in the 2-year-old seedling cohort, and a non-significant but positive correlation in the 6-year-old seedlings. Our results call for further studies on the potential relationship between seedling survival and genetic relatedness to neighboring adults.