干旱区生态环境知识资源中心(Arid): 沙生植物-大赖草克隆多样性

Arid

	沙生植物-大赖草克隆多样性
其他题名	A Study on the Clonal Diversity of Psammophyte-Leymus racemosus
	蔡小霞 1; 吾买尔夏提·塔汉 1; 代培红 2
来源期刊	分子植物育种
ISSN	1672-416X
出版年	2017
卷号	15 期号:1 页码:330-338
中文摘要	为了解大赖草在沙漠中种群结构维持稳定的机制,以便更有效地保护和利用其野生植物资源,本试验利用ISSR标记技术对两个典型生境(沙地及沙丘)的大赖草种群的克隆多样性及克隆结构进行了初步研究。NTSYS分析表明:(1)两个种群(共170个样本)均为多克隆种群,共包含98个基因型,且均为局限基因型,群体间的克隆分化较大;(2)大赖草的克隆多样性较高,Simpson指数(D)平均为0.882,基因型比率(PD)平均为0.562,其中克隆多样性表现为HBX>HBN,大赖草能够以根状茎进行克隆繁殖,而保持较高的克隆多样性,这主要与该物种兼性克隆繁殖及多克隆起源有关;(3)两个居群的克隆结构也有明显差异,HBX种群(生长在沙本文地)的克隆生长空间格局表现为游击型,而HBN种群(生长在沙丘)的克隆结构则表现为密集型,这可能是由于大赖草适应异质性生境;(4)进一步对影响大赖草克隆多样性的因素进行了分析,并提出了保护策略。
英文摘要	In order to understand the mechanisms of Leymus racemosus to maintain a stable population structure in the desert so that its wild plant resources could be more effectively protected and utilized. The study preliminarily analyzed the population diversity and clonal structure of L. racemosus in two typical habitats(sands and dunes) by using ISSR markers. The analysis of NTSYS showed that: Firstly, both of the two populations(170 samples) were polyclonal populations, which contained 98 confined genotypes, and genotype clone differentiation among populations was large; Secondly, L. racemosus has a high clonal diversity, the average Simpson index(D) was 0.882, average genotype ration(PD) was 0.562, the clonal diversity was HBX>HBN. The main reason why L. racemosus could use rhizome reproductive for cloning, and maintaining a high clonal diversity is the facultative clonal propagation and the polyclonal origin of the species; Thirdly, the clone structures of two populations were significantly different. HBX population(grown in sands) had a spatial pattern of guerilla performance in clonal growth, while HBN population(grow in dunes) had an intensive cloning structure. It may be due to the adaptation of L. racemosus to environmental heterogeneity; Finally, the factors affecting the clonal diversity of L. racemosus was further studied and the conservation strategy was suggested.
中文关键词	沙生植物 ; 大赖草 ; 克隆结构 ; 克隆多样性
英文关键词	ISSR-PCR Psammophyte Leymus racemosus ISSR-PCR Clonal structure Clonal diversity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5896260
来源机构	新疆农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235864
作者单位	1.新疆农业大学草业与环境科学学院, 乌鲁木齐, 新疆 830052, 中国; 2.新疆农业大学农学院, 乌鲁木齐, 新疆 830052, 中国
推荐引用方式 GB/T 7714	蔡小霞,吾买尔夏提·塔汉,代培红. 沙生植物-大赖草克隆多样性[J]. 新疆农业大学,2017,15(1):330-338.
APA	蔡小霞,吾买尔夏提·塔汉,&代培红.(2017).沙生植物-大赖草克隆多样性.分子植物育种,15(1),330-338.
MLA	蔡小霞,et al."沙生植物-大赖草克隆多样性".分子植物育种 15.1(2017):330-338.