Heterosis and Genetic Diversity in Variety Crosses of Maize

Moll, R.H. and Salhuana, W.S. and Robinson, H.F. (1962) Heterosis and Genetic Diversity in Variety Crosses of Maize. Crop Science, 2 (3). pp. 197-198.

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Our limited understanding of the cause of heterosis does not provide a basis for deducing the relative amount of heterosis expected in crosses of parents with varying degrees of genetic diversity. Other experimental findings reported in the literature indicate that crosses of unrelated inbred lines of corn show greater heterosis than crosses of related lines (4, 5, 7, 8, 9, 13). These earlier experiments involved lines derived from locally adapted material and represent a limited range of genetic differences. Gilbert (6) has recently expressed the opinion that increased heterozygosis is not always advantageous. The question of the association of heterosis and genetic diversity over a wider range has become particularly important with increasing interest in exotic corns for breeding programs. The study to be reported here involves a wide range of varietal material to examine further this question. Genetic differences between....

Item Type: Article
Author Affiliation: North Carolina Agricultural Experiment Station
Subjects: Crop Improvement
Divisions: Maize
Depositing User: Mr Balakrishna Garadasu
Date Deposited: 04 Feb 2013 06:20
Last Modified: 04 Feb 2013 06:20
Official URL: http://dx.doi.org/10.2135/cropsci1962.0011183X0002...
URI: http://eprints.icrisat.ac.in/id/eprint/9386

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