Somaclonal variation on grain characters of progeny and its F_1 hybrids from regenerated plants for rice early maturing restores line 402

Difference between somatic progenies from regenerated plants and donor parent,F_1 hybrids of somatic progeny and parent on 8 grain characters were compared in this paper.The results showed that among 8 grain characters 1000-grain weight and grain thickness of somaclonal line were significantly lower than that of donor parent,while length/thickness ratio of the grains of somatic hybrids was significantly larger than that of 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 different in correlation coefficient among the grain characters for both somaclonal variation progenies and their F_1 hybrids.