Association of restriction fragment length polymorphisms among maize inbreds with agronomic performance of their crosses

Lee, M. and Godshalk, E.B. and Lamkey, K.R. and Woodman, W.W. (1989) Association of restriction fragment length polymorphisms among maize inbreds with agronomic performance of their crosses. Crop Science, 29 (4). pp. 1067-1071.

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Abstract

Restriction fragment length polymorphisms (RFLPs) have been suggested as molecular markers to facilitate improvement of agronomic traits in maize. To evaluate the utility of RFLP data in elucidating heterotic patterns among maize lines, 8 maize inbred lines and their 28 singlecross hybrids were evaluated for grain yield at 2 Iowa locations in each of 2 years in a randomized-complete block design. The diallel mating design permitted estimation of general and specific combining ability effects. RFLP analysis of inbred lines included 5 restriction enzymes and 5 cDNA and 28 genomic clones distributed over the maize genome. RFLP patterns of crosses were predicted from analysis of the inbred parents. Genetic distances between inbred lines were estimated as modified Rogers' distance (MRD). Grain yield and specific combining ability were significantly correlated with MRD for 6 of the 10 chromosomes. Dispersion of inbred lines and hybrids for RFLP allele frequencies was generally consistent with expectations based on known pedigrees. Results from this study suggest RFLP analysis as a potential alternative to field testing when attempting to assign maize inbred lines to heterotic groups

Item Type: Article
Author Affiliation: Dep. Agron., Iowa State Univ., Ames, IA 50011, USA
Subjects: Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Divisions: Maize
Depositing User: Mr B Krishnamurthy
Date Deposited: 20 Apr 2011 04:46
Last Modified: 20 Apr 2011 04:46
Official URL: http://dx.doi.org/10.2135/cropsci1989.0011183X0029...
URI: http://eprints.icrisat.ac.in/id/eprint/1851

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