Allelism Test And Inheritance Analysis Of Rice Clustered Spikelets Mutant Gene

The genetic and molecular mechanism underlying plant reproductive development has become a heat topic in plant developmental biology. Mutants are good experimental materials. And the acquisition and research on the mutants related to reproductive development played an important role in uncovering the function of and interactions of genes in the process of reproduction, especially in floral development. Rice is one of the most important food crops in the world, and its panicle (inflorescence) contributes to the majority of our harvest. The result of reproductive development directly determines grain quantity and quality in rice. So research on rice reproductive development is significant both in theory and in practical application. In our study, with the panicle characters observation and fitness test in F2 and F3 generations of the cross of clustered spikelets 1 and 42,387,gaogui 99,the results showed that the clustered characters of clustered spikelets 1 was controlled by a single incompletely dominant gene ; SSR marker RM162 which is closed to Cl gene on the chromosome 6 were used to analysis clustered mutation gene of clustered spikelets 1, and have polymorphism between F₂ populations of hybrid combinations,so we believe that clustered mutation gene and Cl gene are the same; the examination observed the panicle character of F₁ and F₂ populations of the cross of clustered spike lets mutants, and the results showed that the clustered gene of cluster 1 and cluster 2 is an allele, but the clustered gene of cluster 1,cluster 2 and wheat-rice isn't an allele, so we believe that we found a new gene locus of rice panicle development, which will provide new mutants for research clustered spikelets development.