Quantitative genetic studies and population improvement in maize and sorghum

Gardner, C.O. (1976) Quantitative genetic studies and population improvement in maize and sorghum. In: Proceedings of the International Conference on Quantitative Genetics, August 16-21, 1976, Lincoln, USA.

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The apparently disappointing recent results of selection studies in Zea mays 'Hays Golden' (absence of response at generation 13 and decrease in yield from generation 17 onwards) are explained by the reduction in genetic variability owing to selection, the inability to identify superior genotypes in new variable isolations and genotype X environment interaction in the recent hot drought years. Studies in sorghum indicated that considerable nonadditive genetic variance exists, that S1 selection is likely to be the most effective breeding system, that frequencies of favourable alleles tend to be below 0.5 and that exotic germplasm can be useful in breeding programmes

Item Type: Conference or Workshop Item (Paper)
Author Affiliation: Department of Agronomy, University of. Nebraska, Lincoln, USA
Subjects: Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Divisions: Maize
Depositing User: Ms K Syamalamba
Date Deposited: 10 Oct 2012 07:24
Last Modified: 10 Oct 2012 07:24
URI: http://eprints.icrisat.ac.in/id/eprint/8357

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