Rao, N.G.P. (1970) Genetic Analysis of Some Exotic X Indian Crosses in Sorghum. II. Combining Ability and Components of Genetic Variation. Indian Journal of Genetics and Plant Breeding , 30 (2). pp. 362-376.
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Abstract
An examination of the mean values and heterotic response of crosses involving a wide range of parents of both exotic and Indian origin from a diallel mating system reveal that some exotic X Indian combinations were at a higher yield level in spite of comparable heterosis to exotic X exotic combinations. This was not possible when msCK60 was used as the female parent. Combinations which yield one-and-half to two times the present commercial hybrids have been identified. The development of the parents of these known combinations into males and females can result in future hybrids representing marked increases of yield over the first hybrids. Results of analysis of combining ability from a diallel mating system involving exotic and Indian parents indicate that both general and specific combining ability variances for yield are of equal magnitude, thereby indicating the importance of non-allelic interactions in influencing yield. The gene action for days to flower and plant height was essentially additive. Graphic analysis and estimates of components of genetic variation are also in general agreement with the combining ability analysis. Crosses with high specific and low general and high general and low specific effects have been identified, which could be useful for hybrid and conventional breeding methods respectively. Performance of line per se together with its nature of combining ability is expected to furnish the guide line in the choice of parents.
| Item Type: | Article |
|---|---|
| Author Affiliation: | All India Coordinated Sorghum Improvement Project, I.A.R.I., Regional Research Station, Hyderabad-30, A.P. |
| Subjects: | Plant Production Crop Improvement |
| Divisions: | Sorghum |
| Depositing User: | Mr. SanatKumar Behera |
| Date Deposited: | 29 May 2012 04:37 |
| Last Modified: | 29 May 2012 04:37 |
| Official URL: | http://www.indianjournals.com/ijor.aspx?target=ijo... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/5866 |
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