水稻体细胞无性系及其杂种F_1粒形的遗传变异

Somaclonal Variation on Grain Characters of P rogeny and Their F_1 Hybrids from Regenerated Plants in Rice

比较了水稻体细胞无性系与供体亲本、体细胞无性系杂种F1与供体亲本杂种F1在 8个谷粒性状上的差异 ,结果表明 :体细胞无性系除千粒重及谷粒厚 2性状显著小于亲本外 ,其余性状与亲本差异不显著 ;体细胞无性系杂种F1的长厚比显著大于亲本杂种F1,而谷粒厚则相反。聚类分析将 5 3个体细胞无性系及 5 3个相应的杂种F1分别聚为 4类 ,R3及R1F2 各类别间 8个谷粒性状均存在极显著差异。R3与R1F2 谷粒性状间的相关性表现也存在一定的差异。

Difference between somatic progenies from regenerated plants and donor parent, F 1 hybrids of somatic progeny and parent on 8 grain characters were compared. It was found that among 8 grain characters 1000-grain weight and grain thickness of somaclonal line were significantly lower than donor parent, while length/thickness ratio of the grains of somatic hybrids was significantly larger than parent hybrid, but their grain thickness was significantly lower than ones. Cluster analysis based on 8 grain characters data showed that 53 R 3 generation and 53 R 1F 2 generation could be classified into four classification, respectively, among which difference of the 8 grain characters were significant at 1% levels. There were also differences for correlation coefficient among the grain characters both somaclonal variation progenies and their F 1 hybrids.