文献类型： 外文期刊
作者： Zhao, Hua 1 ; Wang, Bo 2 ; He, Junrong 4 ; Yang, Junpin 5 ; Pan, Lei 2 ; Sun, Dongfa 1 ; Peng, Junhua 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan, Hubei, Peoples R China
2.Chinese Acad Sci, Wuhan Bot Garden, Wuhan, Hubei, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
4.Sichuan Acad Agr Sci, Inst Hort, Chengdu, Peoples R China
5.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu, Peoples R China
期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）
ISSN： 1932-6203
年卷期： 2013 年 8 卷 10 期
页码：
收录情况： SCI
摘要： Miscanthus is a perennial rhizomatous C4 grass native to East Asia. Endowed with great biomass yield, high ligno-cellulose composition, efficient use of radiation, nutrient and water, as well as tolerance to stress, Miscanthus has great potential as an excellent bioenergy crop. Despite of the high potential for biomass production of the allotriploid hybrid M. xgiganteus, derived from M. sacchariflorus and M. sinensis, other options need to be explored to improve the narrow genetic base of M. xgiganteus, and also to exploit other Miscanthus species, including M. sinensis (2n=2x=38), as bioenergy crops. In the present study, a large number of 459 M. sinensis accessions, collected from the wide geographical distribution regions in China, were genotyped using 23 SSR markers transferable from Brachypodium distachyon. Genetic diversity and population structure were assessed. High genetic diversity and differentiation of the germplasm were observed, with 115 alleles in total, a polymorphic rate of 0.77, Nei's genetic diversity index (He) of 0.32 and polymorphism information content (PIC) of 0.26. Clustering of germplasm accessions was primarily in agreement with the natural geographic distribution. AMOVA and genetic distance analyses confirmed the genetic differentiation in the M. sinensis germplasm and it was grouped into five clusters or subpopulations. Significant genetic variation among subpopulations indicated obvious genetic differentiation in the collections, but within-subpopulation variation (83%) was substantially greater than the between-subpopulation variation (17%). Considerable phenotypic variation was observed for multiple traits among 300 M. sinensis accessions. Nine SSR markers were found to be associated with heading date and biomass yield. The diverse Chinese M. sinensis germplasm and newly identified SSR markers were proved to be valuable for breeding Miscanthus varieties with desired bioenergy traits.
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