ISSN:
1432-2242
Keywords:
Keys words QTL
;
RFLP markers
;
Interval mapping
;
Diallel
;
Maize
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract We describe and apply an interval mapping method for quantitative trait locus (QTL) detection using F3 and testcross progenies derived from F2 populations obtained from a diallel cross among four elite lines of maize. Linear model-based procedures were used for the test and estimation of putative QTL effects together with genetic interactions including epistasis. We mapped QTL associated with silking date and explored their genetic effects. Ten QTL were detected, and these explained more than 40% of the phenotypic variance. Most of these QTL had consistent and stable effects among genetic backgrounds and did not show significant epistasis. QTL-by-environment interaction was important for four QTL and was essentially due to changes in magnitude of allelic effects. These results show the efficiency of our method in several genetic situations as well as the power of the diallel design in detecting QTL simultaneously over several populations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s001220050582
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