花生抗青枯病种质脂肪酸组成的遗传多样性

通过对123份不同类型抗青枯病花生种质种子脂肪酸的鉴定测试,分析了抗青枯病花生种质在这些性状方面的遗传分化,并与6006份资源组成的花生基础收集品进行了比较。研究结果表明,我国抗青枯病花生资源的油酸含量平均为51.78%,显著高于基础收集品的对应值(45.64%);亚油酸含量平均为28.88%,显著低于基础收集品的对应值(34.36%);高油酸种质较多,油酸含量达61%以上的资源23份,所占比重为18.7%,显著高于基础品中的相应比重(2.65%)。标准差、变异系数以及遗传多样性指数的分析结果表明,抗青枯病资源在油酸和亚油酸含量方面的遗传分化程度高。

Diversity of Fatty Acid Components in Peanut Genotypes with Bacterial Wilt Resistance

The fatty acids were evaluated in 123 genotypes with bacterial wilt resistance and compared with the corresponding characters in entire collection of 6006 accessions.The results revealed that the average oleic acid content in resistant genotypes was 51.78% which was significantly higher than that in entire collection(45.64%) and average linoleic acid content was 28.88% which was significantly lower than that in entire collection(34.36%). There were 23 accessions with high concent of oleic acid(over 61%),taking 18.7% of the number of resistant genotypes,which was much higher than those in entire collection(2.65%).The diversity in oleic acid,linoleic acid and palmitic acid contents in genotypes with bacterial wilt resistance was much richer than that in entire collections based on the analysis of standard deviation,variation coefficient and genetic diversity index.