The Gametophyte-1 locus and reproductive isolation among Zea mays subspecies
Fourteen paired populations of annual teosinte and an associated maize landrace were characterized for allelic composition of the potential crossing barrier locus ga1. The four populations of subspecies parviglumis teosinte carried predominately ga1 or Ga1-m, both of which are receptive to ga1 pollen. The sole population of subspecies huehuetenangensis was polymorphic for Ga1-m and for Ga1-s, which is unreceptive to ga1 pollen. Ga1-s predominated among the six weedy populations of subspecies mexicana whereas the three ruderal/weedy populations of this subspecies contained ga1 or Ga1-m. This distribution suggests a role for Ga1-s enabling weedy populations to grow in intimate association with maize. However, the predominant allele in sympatric maize landraces proved to be Ga1-m, which regularly fertilized Ga1-s in controlled crosses. The Ga1-s pistil barrier thus would seem unable to prevent teosinte from being fertilized by sympatric maize. Nevertheless, Ga1-s pollen fertilized Ga1-s Ga1-s plants somewhat mor effectively than Ga1-m when both were present. This preference may be strengthened by modifier gene differences between teosinte and maize, thereby providing partial reproductive isolation between the two.
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Consiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Maiscoltura
2006
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Subjects: | AGRICULTURAL SCIENCES AND BIOTECHNOLOGY, Teosinte, Reproductive Isolation, ZEA MEXICANA, MAIZE, GENES, |
Online Access: | http://hdl.handle.net/10883/1705 |
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dig-cimmyt-10883-17052021-05-17T16:49:09Z The Gametophyte-1 locus and reproductive isolation among Zea mays subspecies Kermicle, J.L. Taba, S. Evans, M.M.S. AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Teosinte Reproductive Isolation ZEA MEXICANA MAIZE GENES Fourteen paired populations of annual teosinte and an associated maize landrace were characterized for allelic composition of the potential crossing barrier locus ga1. The four populations of subspecies parviglumis teosinte carried predominately ga1 or Ga1-m, both of which are receptive to ga1 pollen. The sole population of subspecies huehuetenangensis was polymorphic for Ga1-m and for Ga1-s, which is unreceptive to ga1 pollen. Ga1-s predominated among the six weedy populations of subspecies mexicana whereas the three ruderal/weedy populations of this subspecies contained ga1 or Ga1-m. This distribution suggests a role for Ga1-s enabling weedy populations to grow in intimate association with maize. However, the predominant allele in sympatric maize landraces proved to be Ga1-m, which regularly fertilized Ga1-s in controlled crosses. The Ga1-s pistil barrier thus would seem unable to prevent teosinte from being fertilized by sympatric maize. Nevertheless, Ga1-s pollen fertilized Ga1-s Ga1-s plants somewhat mor effectively than Ga1-m when both were present. This preference may be strengthened by modifier gene differences between teosinte and maize, thereby providing partial reproductive isolation between the two. 219-225 2013-06-07T21:02:28Z 2013-06-07T21:02:28Z 2006 Article http://hdl.handle.net/10883/1705 English CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose. Open Access PDF Consiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Maiscoltura 2 51 Maydica |
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AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Teosinte Reproductive Isolation ZEA MEXICANA MAIZE GENES AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Teosinte Reproductive Isolation ZEA MEXICANA MAIZE GENES |
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AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Teosinte Reproductive Isolation ZEA MEXICANA MAIZE GENES AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Teosinte Reproductive Isolation ZEA MEXICANA MAIZE GENES Kermicle, J.L. Taba, S. Evans, M.M.S. The Gametophyte-1 locus and reproductive isolation among Zea mays subspecies |
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Fourteen paired populations of annual teosinte and an associated maize landrace were characterized for allelic composition of the potential crossing barrier locus ga1. The four populations of subspecies parviglumis teosinte carried predominately ga1 or Ga1-m, both of which are receptive to ga1 pollen. The sole population of subspecies huehuetenangensis was polymorphic for Ga1-m and for Ga1-s, which is unreceptive to ga1 pollen. Ga1-s predominated among the six weedy populations of subspecies mexicana whereas the three ruderal/weedy populations of this subspecies contained ga1 or Ga1-m. This distribution suggests a role for Ga1-s enabling weedy populations to grow in intimate association with maize. However, the predominant allele in sympatric maize landraces proved to be Ga1-m, which regularly fertilized Ga1-s in controlled crosses. The Ga1-s pistil barrier thus would seem unable to prevent teosinte from being fertilized by sympatric maize. Nevertheless, Ga1-s pollen fertilized Ga1-s Ga1-s plants somewhat mor effectively than Ga1-m when both were present. This preference may be strengthened by modifier gene differences between teosinte and maize, thereby providing partial reproductive isolation between the two. |
format |
Article |
topic_facet |
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Teosinte Reproductive Isolation ZEA MEXICANA MAIZE GENES |
author |
Kermicle, J.L. Taba, S. Evans, M.M.S. |
author_facet |
Kermicle, J.L. Taba, S. Evans, M.M.S. |
author_sort |
Kermicle, J.L. |
title |
The Gametophyte-1 locus and reproductive isolation among Zea mays subspecies |
title_short |
The Gametophyte-1 locus and reproductive isolation among Zea mays subspecies |
title_full |
The Gametophyte-1 locus and reproductive isolation among Zea mays subspecies |
title_fullStr |
The Gametophyte-1 locus and reproductive isolation among Zea mays subspecies |
title_full_unstemmed |
The Gametophyte-1 locus and reproductive isolation among Zea mays subspecies |
title_sort |
gametophyte-1 locus and reproductive isolation among zea mays subspecies |
publisher |
Consiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Maiscoltura |
publishDate |
2006 |
url |
http://hdl.handle.net/10883/1705 |
work_keys_str_mv |
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