华南农业大学学报
華南農業大學學報
화남농업대학학보
JOURNAL OF SOUTH CHINA AGRICULTURAL UNIVERSITY
2014年
4期
42-49,55
,共9页
赵青松%赵云云%王朋%邓小娟%马启彬%年海%杨存义
趙青鬆%趙雲雲%王朋%鄧小娟%馬啟彬%年海%楊存義
조청송%조운운%왕붕%산소연%마계빈%년해%양존의
野生大豆%空间分布%遗传多样性%群体结构
野生大豆%空間分佈%遺傳多樣性%群體結構
야생대두%공간분포%유전다양성%군체결구
wild soybean%spatial distribution%genetic diversity%population structure
【目的】揭示野生大豆Glycine soja Sieb.et Zucc.在特定微环境中演化和分化的信息,为自然居群的取样提供理论依据.【方法】采用41对SSR引物对湖南新田大冠岭地区及其周围的16个居群612份野生大豆材料的遗传多样性和群体结构进行了分析,并分析了居群多样性与空间分布间的关系.【结果和结论】41个SSR位点在612份野生大豆材料中共检测出414个等位变异,每个位点的等位变异范围为4~19个,平均为10.1个.每个位点Shannon指数(I)变异范围为0.283~2.542,平均为1.751.通过比较不同居群遗传多样性指数,发现大冠岭区域向西岭至桑梓一带野生大豆遗传多样性丰富,拥有较多的等位变异,与其周围居群间有较高的基因流.用基于混合模型的Structure2.3软件分析群体结构,可将野生大豆居群分为19个组群,大冠岭区域向西岭至桑梓一带野生大豆居群互混成不同组,而远离大冠岭的野生大豆居群则大都独立.空间自相关分析显示,1400 m以内遗传距离与地理距离呈正相关;向西岭至桑梓一带是大冠岭区域野生大豆居群的一个多样性中心,周围野生大豆自然居群呈现出明显的空间分布特点,遗传多样性与地理距离、海拔呈正相关,大冠岭野生大豆传播方式为由高海拔地区向低海拔辐射传播.因此认为该地区野生大豆遗传结构模式应属于距离隔离模式和陆岛模式.
【目的】揭示野生大豆Glycine soja Sieb.et Zucc.在特定微環境中縯化和分化的信息,為自然居群的取樣提供理論依據.【方法】採用41對SSR引物對湖南新田大冠嶺地區及其週圍的16箇居群612份野生大豆材料的遺傳多樣性和群體結構進行瞭分析,併分析瞭居群多樣性與空間分佈間的關繫.【結果和結論】41箇SSR位點在612份野生大豆材料中共檢測齣414箇等位變異,每箇位點的等位變異範圍為4~19箇,平均為10.1箇.每箇位點Shannon指數(I)變異範圍為0.283~2.542,平均為1.751.通過比較不同居群遺傳多樣性指數,髮現大冠嶺區域嚮西嶺至桑梓一帶野生大豆遺傳多樣性豐富,擁有較多的等位變異,與其週圍居群間有較高的基因流.用基于混閤模型的Structure2.3軟件分析群體結構,可將野生大豆居群分為19箇組群,大冠嶺區域嚮西嶺至桑梓一帶野生大豆居群互混成不同組,而遠離大冠嶺的野生大豆居群則大都獨立.空間自相關分析顯示,1400 m以內遺傳距離與地理距離呈正相關;嚮西嶺至桑梓一帶是大冠嶺區域野生大豆居群的一箇多樣性中心,週圍野生大豆自然居群呈現齣明顯的空間分佈特點,遺傳多樣性與地理距離、海拔呈正相關,大冠嶺野生大豆傳播方式為由高海拔地區嚮低海拔輻射傳播.因此認為該地區野生大豆遺傳結構模式應屬于距離隔離模式和陸島模式.
【목적】게시야생대두Glycine soja Sieb.et Zucc.재특정미배경중연화화분화적신식,위자연거군적취양제공이론의거.【방법】채용41대SSR인물대호남신전대관령지구급기주위적16개거군612빈야생대두재료적유전다양성화군체결구진행료분석,병분석료거군다양성여공간분포간적관계.【결과화결론】41개SSR위점재612빈야생대두재료중공검측출414개등위변이,매개위점적등위변이범위위4~19개,평균위10.1개.매개위점Shannon지수(I)변이범위위0.283~2.542,평균위1.751.통과비교불동거군유전다양성지수,발현대관령구역향서령지상재일대야생대두유전다양성봉부,옹유교다적등위변이,여기주위거군간유교고적기인류.용기우혼합모형적Structure2.3연건분석군체결구,가장야생대두거군분위19개조군,대관령구역향서령지상재일대야생대두거군호혼성불동조,이원리대관령적야생대두거군칙대도독립.공간자상관분석현시,1400 m이내유전거리여지리거리정정상관;향서령지상재일대시대관령구역야생대두거군적일개다양성중심,주위야생대두자연거군정현출명현적공간분포특점,유전다양성여지리거리、해발정정상관,대관령야생대두전파방식위유고해발지구향저해발복사전파.인차인위해지구야생대두유전결구모식응속우거리격리모식화륙도모식.
Objective]To explore the information of development and differentiation of special micro-envi-ronment of wild soybean for sampling wild soybean .[Method] A total of 41 simple sequence repeat ( SSR) markers scattered on the whole genome were used to analyze the genetic diversity and genetic structure , and to evaluate the relationship between genetic diversity and spatial distribution of the 16 wild soybean populations with a sample of 612 individuals around Daguanling in Xintian County , Hunan Prov-ince.[Result and conclusion] A total of 414 alleles were detected with 41 SSR marks among 612 acces-sions, and the average number of allelic variations per locus was 10.1, ranging from 4 to 19.The average Shannon’s information index (I) per locus was 1.751 with a range of 0.283-2.542.It was discovered that the region from Xiangxiling to Sangzi had a higher genetic diversity and more allelic variations than other regions , and also had a higher gene flow than the other populations by comparing genetic diversity index of different populations .The wild soybean accessions could be divided into 19 sub-groups by the a-nalysis of population structure with software Structure 2.3 based on mixed model .The populations near the region from Xiangxiling to Sangzi were divided into different sub-groups and the populations far from Daguanling were clustered into different groups separately .There was a positive correlation between ge-netic distance and geographic distance under the condition that the sample ’ s distance was less than 1 400 m.The region from Xiangxiling to Sangzi was a diversity center of wild soybean in Daguanling region . Populations near the region apparently had the character of spatial distribution .Genetic diversity was pos-itively correlated with geographic distance and altitude .The population of wild soybean in Daguanling dis-perse from high altitude to low altitude .The spread model of this region is distance model and continent-island model .