Genetic variance for endosperm characteristics in sorghum

Govil, J.N. and Murty, B.R. (1980) Genetic variance for endosperm characteristics in sorghum. Indian Journal of Genetics and Plant Breeding, 40 (2). pp. 366-374.

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Ten diversse varieties of sorghum and 45 F1 hybrids among them were evaluated for endosperm characteristics to know the nature of gene action and combining ability, using full and partial diallels. The relative efficiency of partial diallel was also determined. The magnitude of general combining ability variance was found to be higher compared to specific combining ability variance for all the characters in the full diallel analysis. The changes in the size of partial diallels did not result in any consistent pattern of change in the magnitude of general combining ability. However, there was an increasing trend in the magnitude of specific combining ability variances from full diallel to reduced size o{ partial diallel. The estimates of general combining ability effects remained unaffected with the partial diallel leading to the successful selection of top five parents in as low a size as s=3 of partial diallel. Hence, for characters wherein the heritability was high and degree of dominance was low even the smallest number of crosses per parent (s=3) gave reliable estimates without adversely affecting the efficiency of selection

Item Type: Article
Author Affiliation: Division of Genetics, Indian Agricultural Research Institute, New Delhi, 110 012, India
Subjects: Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 16 May 2012 10:52
Last Modified: 16 May 2012 10:52
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