Exceptional Genetic Divergence of Northern Flint Corn

Doebley, John; Goodman, or M.; Stuber, C. W.

doi:10.1002/j.1537-2197.1986.tb09681.x

Cited by 67 publications

(39 citation statements)

References 12 publications

(6 reference statements)

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“…Despite a specific emphasis given to American populations representative of putative sources of European germplasm, our results confirmed the exceptional genetic divergence between Northern Flints and other NorthAmerican populations previously observed by allozyme analysis (Doebley et al 1986). The genetic proximity between these Northern Flint populations and Chilean populations from the Chiloe Island, also observed at the morphological level (Rebourg 2000), suggests a common genetic origin, the dating of which remains to be determined.…”

Section: Relationships Within American Populationssupporting

confidence: 90%

Maize introduction into Europe: the history reviewed in the light of molecular data

Rebourg¹,

Chastanet²,

Gouesnard³

et al. 2003

Theor Appl Genet

164

129

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The resolution that can be obtained from molecular genetic markers affords new prospects for understanding the dispersion of agricultural species from their primary origin centres. In order to study the introduction and the dispersion of maize in Europe, we have characterised a large and representative set of maize populations of both American and European origins for their variation at 29 restriction fragment length polymorphism loci. Polymorphism was higher for American populations than for European populations (respectively, 12.3 and 9.6 alleles per locus, on average), and only a few alleles were specific to European populations. Investigation of genetic similarity between populations from both continents made it possible to identify various types of American maize introduced into Europe at different times or in different places and which have given rise to distinctive European races. Beyond confirming the importance of Caribbean germplasm, the first maize type to be introduced into Europe, this research revealed that introductions of Northern American flint populations have played a key role in the adaptation of maize to the European climate. According to a detailed historical investigation, the introduction of these populations must have occurred shortly after the discovery of the New World.

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Section: Relationships Within American Populationssupporting

confidence: 90%

Maize introduction into Europe: the history reviewed in the light of molecular data

Rebourg¹,

Chastanet²,

Gouesnard³

et al. 2003

Theor Appl Genet

164

129

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show abstract

“…Maize originated from southern Mexico, where there are long growing seasons and high temperatures. As maize agriculture expanded from Mexico through the Southwestern United States to the Eastern United States (with its shorter growing season and lower temperatures), a severe bottleneck occurred in maize diversity, resulting in the Northern Flint subpopulation [29]. The bottleneck created extensive long range LD in this subpopulation.…”

Section: Introductionmentioning

confidence: 99%

“…The bottleneck created extensive long range LD in this subpopulation. Northern Flints were substantially isolated from all other maize subpopulations [29] until the introduction of the Southern Dents in the 1600s [30].…”

Section: Introductionmentioning

confidence: 99%

Lessons from Dwarf8 on the Strengths and Weaknesses of Structured Association Mapping

2013

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The strengths of association mapping lie in its resolution and allelic richness, but spurious associations arising from historical relationships and selection patterns need to be accounted for in statistical analyses. Here we reanalyze one of the first generation structured association mapping studies of the Dwarf8 (d8) locus with flowering time in maize using the full range of new mapping populations, statistical approaches, and haplotype maps. Because this trait was highly correlated with population structure, we found that basic structured association methods overestimate phenotypic effects in the region, while mixed model approaches perform substantially better. Combined with analysis of the maize nested association mapping population (a multi-family crossing design), it is concluded that most, if not all, of the QTL effects at the general location of the d8 locus are from rare extended haplotypes that include other linked QTLs and that d8 is unlikely to be involved in controlling flowering time in maize. Previous independent studies have shown evidence for selection at the d8 locus. Based on the evidence of population bottleneck, selection patterns, and haplotype structure observed in the region, we suggest that multiple traits may be strongly correlated with population structure and that selection on these traits has influenced segregation patterns in the region. Overall, this study provides insight into how modern association and linkage mapping, combined with haplotype analysis, can produce results that are more robust.

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“…During these episodes, transposable elements may have been mobilized, causing both restructuring of the genome and elevated mutation rates (McClintock, 1984). One wonders if the Northern Rint Corns, which differ so dramatically from all other types of com, are not the result of some such process (Doebley et al, 1986). Molecular analyses of the genomes of crops and their progenitors are certain to provide new insights into these questions.…”

Section: Future Prospectsmentioning

confidence: 99%

Molecular Systematics of Plants

Soltis¹,

Soltis²,

Doyle³

1992

201

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F Of more intormation contact:AlI rights reserved. No part ofthis book covered by the copyright hereon may be reproduced Of used in any form or by any means--graphic, electronic. Of mechanical, inc1uding photocopying. recording. taping, Of intonnation storage and retrieval systems--without the written pennission of the publisher.2 3 4 5 6 7 8 9 XXX OI 00 99 98 97 96 Library of Congress Cataloging-ill-Publicatioll DataMolocular systematics ofplaots / edited by Pamela S. Sollis. Douglas E. Sollis, and Jelt' J. Doyle. p. em. lncludes bibliographical references and index.

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Exceptional Genetic Divergence of Northern Flint Corn

Cited by 67 publications

References 12 publications

Maize introduction into Europe: the history reviewed in the light of molecular data

Maize introduction into Europe: the history reviewed in the light of molecular data

Lessons from Dwarf8 on the Strengths and Weaknesses of Structured Association Mapping

Molecular Systematics of Plants

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