Apomixis: Its Identification and Use in Plant Breeding

Hanna, W.W. and Bashaw, E.C. (1987) Apomixis: Its Identification and Use in Plant Breeding. Crop Science, 27 (6). pp. 1136-1139.

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Apomixis, an asexual method of reproduction through the seed, provides unique opportunities for developing superior cultivars in the future. Apomixis occurs at low levels in some cultivated species and can be found in closely related species of many cultivated crops.The purposes of this paper are to help plant breeders and geneticists recognize apomixis and to show how it can be used in plant improvement.Transfer of apomixis to important crops would make possible development of true-breeding hybrids and commercial production of hybrids without a need for cytoplasmic male sterility and high cost, labor-intensive processes. Obligately apomictic hybrids would breed true regardless of heterozygosity. It could also provide an efficient method for incorporating genes into new genotypes. Superiorobligate apomictic genotypes would be ready for performance testing without a need for progeny testing to determine genetic stability. The commercial hybrid production process would be simplified with apomictic hybrids. Several apomixis mechanisms have been shown to be genetically controlled and therefore subject to genetic manipulation in plant breeding programs. Characteristics such as: (i) uniform progenies from heterozygous F1 or open-pollinated parents, (ii) maternal types in crosses, (iii) high seed set in unstable genotypes, and (iv) multiple ovules and seedings per ovule are indicators of apomixis that should be investigated.

Item Type: Article
Uncontrolled Keywords: Hybrids, Apospory, Diplospory, Adventitious embryony, Plant improvement
Author Affiliation: Cooperative investigations of the USDA-ARS and the Univ.of Georgia College of Agric.Exp.Stn.,Coastal Plain Exp.Stn.,Tifton
Subjects: Crop Improvement
Crop Improvement > Plant Breeding
Divisions: General
Depositing User: Mr Arbind Seth
Date Deposited: 01 Jan 2013 08:34
Last Modified: 01 Jan 2013 08:34
Official URL: https://www.agronomy.org/publications/cs/abstracts...
URI: http://eprints.icrisat.ac.in/id/eprint/9246

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