Relationships among maize inbred lines and populations from European and North-American origins as estimated using RFLP markers |
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Authors: | P Dubreuil A Charcosset |
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Institution: | (1) INRA-Station de Génétique Végétale, Ferme du Moulon, F-91190 Gif-sur-Yvette, France e-mail: charcos@moulon.inra.fr Fax: +33169332340, FR |
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Abstract: | RFLP markers have proven to be a reliable and highly informative tool for characterizing genetic diversity in maize. Joint
analysis of inbred lines and populations should provide valuable information with respect to (1) a better understanding of
the genetic basis of present elite germplasm and (2) the identification of populations that may prove to be useful sources
of genetic diversity for breeding programs. Sixty-two inbred lines of known heterotic groups and ten maize populations, some
of them significant contributors to the genetic basis of the heterotic groups, were assayed at 28 RFLP loci. Joint data analyses
first underlined that the populations displayed a large number of alleles that were absent in the set of inbred lines. Associations
among inbreds and populations further proved consistent with pedigree data of the inbreds and provided new information on
the genetical basis of heterotic groups. In particular, European flint inbreds were revealed to be as close to the Northeastern
U.S. flint population studied as to the typical European populations. These results advocate the analysis of larger sets of
populations by means of molecular markers in order to (1) gain insight into the history of maize germplasm and (2) set up
appropriate strategies for the use of genetic resources in breeding programs.
Received: 23 February 1998 / Accepted: 5 February 1999 |
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Keywords: | RFLP Maize Lines Populations |
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