Analysis on Genetic Diversity and Genetic Basis of the Main Sesame Cultivars Released in China

文献类型： 外文期刊

第一作者： Zhang Yan-xin

作者： Zhang Yan-xin;Sun Jian;Zhang Xiu-rong;Wang Lin-hai;Che Zhuo

作者机构：

关键词： sesame (Sesamum indicum L.);cultivars;SRAP;genetic diversity;genetic basis

期刊名称：AGRICULTURAL SCIENCES IN CHINA （ 影响因子：0.82； 五年影响因子：0.997 ）

ISSN： 1671-2927

年卷期： 2011 年 10 卷 4 期

页码：

收录情况： SCI

摘要： SRAP (sequence-related amplified polymorphism) was used for the analysis of 67 sesame (Sesamum indicum L.) cultivars widely used in Chinese sesame major production areas from 1950 to 2007. A total of 561 bands were amplified using 21 SRAP random primer pairs, with 265 of them were polymorphic, resulting in a polymorphism ratio of 47.2%. The total bands and polymorphism amplified by each primer pair averaged 26.7 and 12.6, respectively. The average genetic similar coefficient and genetic distance of the 67 cultivars were 0.9104 and 0.0706, respectively, indicating limited genetic diversity and narrow genetic basis. Comparative analysis on genetic similarity and genetic distance of different classified cultivars showed that the difference of average genetic similarity coefficient and genetic distance between the landraces and cultivars bred through crosses reached significant levels (P=0.01), with the genetic basis of landraces wider than that bred cultivars. The genetic basis of cultivars used in 1990-2007 was more narrow than that of cultivars from 1950 to 1969 and from 1970 to 1989, with the differences of average genetic similarity coefficient and genetic distance reached 0.01 significant level. The genetic basis of Chinese sesame main cultivars is relatively narrow, and the genetic basis of cultivars developed through crosses in recent years is narrower than history cultivars.

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