Population clonal diversity and fine-scale genetic structure in Oryza officinalis (Poaceae) from China, implications for in situ conservation
文献类型： 外文期刊
作者： Zhao, Yao 1 ; Chen, Chengbin 2 ; Rong, Jun 1 ; Dong, Shanshan 1 ; Liao, Hui 1 ; Lu, Fan 1 ; Lu, Baorong 1 ; Chen, Jiakuan 1 ;
作者机构： 1.Fudan Univ, Minist Educ, Key Lab Biodivers Sci & Ecol Engn, Inst Biodivers Sci, Shanghai 200433, Peoples R China
2.Guangxi Acad Agr Sci, Rice Res Inst, Nanning 530007, Peoples R China
3.Leiden Univ, Inst Biol Leiden, NL-2300 RA
关键词： Clonal diversity;Conservation;Fine-scale genetic structure;Habitat degradation;Oryza officinalis
期刊名称：GENETIC RESOURCES AND CROP EVOLUTION （ 影响因子：1.524； 五年影响因子：1.713 ）
ISSN： 0925-9864
年卷期： 2012 年 59 卷 1 期
页码：
收录情况： SCI
摘要： Population clonal diversity and fine-scale genetic structure of Oryza officinalis Wall. ex Watt, an endangered species in China recently experiencing habitat degradation, was estimated using inter simple sequence repeat markers. We analyzed the genetic variations of 440 samples exhaustively collected from nine O. officinalis populations. Relatively rich clonal diversity and poor genetic variation were found in the extant populations. We found that the number of genets, the percentage of polymorphic loci, and gene diversity decreased with population decline, suggesting that habitat degradation will lead to further genetic depletion of O. officinalis populations. A pronounced spatial genetic structure occurs at both the ramet and genet levels in several larger populations, which is the result of clonal growth and concomitant inbreeding. The in situ conserved population PS holds much more genotypes than other populations with the similar population size, which might have more seedling recruitments from the soil seed bank due to habitat disturbance, suggesting a moderate disturbance combined with habitat degradation-avoiding measures are effective for in situ conservation of this species.
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