Indian Journal of Genetics and Plant Breeding (The)
Year : 1967, Volume : 27, Issue : 2
First page : ( 226) Last page : ( 237)
Print ISSN : 0019-5200. Online ISSN : 0975-6906.

The Influence of Dwarfing Genes on Genetic Diversity in Pemmisetum Typhoides (Burm.) S. & H.

Murty B. R., Tiwari J. L.

Division of Genetics, Indian Agricultural Research Institute, Delhi-12

Accepted:  20  May,  1967.

Summary

The nature and the magnitude of the genetic diversity in sixty-four derived dwarf populations was assessed by multivariate analysis using D₂ statistic. The diversity generated by hybridization involving dwarfs was found to be equally as good as that available from a wide collection from different geographical areas. Among the four dwarf parents, D₂ and D₄ were the best in generating diversity. The sixty-four dwarfs could be grouped into 15 clusters by multivariate analysis. The most potent factor for divergence in the dwarf derivatives appeared to be tiller number, both at the inter- and intra-cluster levels of differentiation. Among the other characters, ear length was more powerful for divergence than ear girth. The forces of differentiation for these characters appeared to be different at the inter- and intra-cluster levels. New derivatives were found to be superior as compared to their parental populations after four to six generations of inbreeding. The possibility of the creation of germ plasm complexes involving the dwarfs is indicated.

Top