CIMMYT is the source of improved maize (Zea mays L.) breeding material
for a significant portion of the nontemperate maize growing world.
Landraces which did not serve as sources for improved maize germplasm
may contain untapped allelic variation useful for future breeding
progress. Information regarding levels of diversity in different
germplasm would help to identify sources for broadening improved
breeding pools and in seeking genes and alleles that have not been
tapped in modern maize breeding. The objectives of this study were to
examine the diversity in maize landraces, modern open pollinated
varieties (OPVs), and inbred lines adapted to nontemperate growing
areas to find unique sources of allelic diversity that may be used in
maize improvement. Twenty-five simple sequence repeat markers were used
to characterize 497 individuals from 24 landraces of maize from Mexico,
672 individuals from 23 CIMMYT improved breeding populations, and 261
CIMMYT inbred lines. Number of alleles, gene diversity per locus,
unique alleles per locus, and population structure all differ between
germplasm groups. The unique alleles found in each germplasm group
represent a great reservoir of untapped genetic resources for maize
improvement, and implications for,hybrid breeding are discussed.
%0 Journal Article
%1 ISI:000254855500025
%A Warburton, M. L.
%A Peif, J. C.
%A Frisch, M.
%A Bohn, M.
%A Bedoya, C.
%A Xia, X. C.
%A Crossa, J.
%A Franco, J.
%A Hoisington, D.
%A Pixley, K.
%A Taba, S.
%A Melchinger, A. E.
%D 2008
%J CROP SCIENCE
%K IFZ imported
%N 2
%P 617-624
%T Genetic diversity in CIMMYT nontemperate maize germplasm: Landraces, open pollinated varieties, and inbred lines
%V 48
%X CIMMYT is the source of improved maize (Zea mays L.) breeding material
for a significant portion of the nontemperate maize growing world.
Landraces which did not serve as sources for improved maize germplasm
may contain untapped allelic variation useful for future breeding
progress. Information regarding levels of diversity in different
germplasm would help to identify sources for broadening improved
breeding pools and in seeking genes and alleles that have not been
tapped in modern maize breeding. The objectives of this study were to
examine the diversity in maize landraces, modern open pollinated
varieties (OPVs), and inbred lines adapted to nontemperate growing
areas to find unique sources of allelic diversity that may be used in
maize improvement. Twenty-five simple sequence repeat markers were used
to characterize 497 individuals from 24 landraces of maize from Mexico,
672 individuals from 23 CIMMYT improved breeding populations, and 261
CIMMYT inbred lines. Number of alleles, gene diversity per locus,
unique alleles per locus, and population structure all differ between
germplasm groups. The unique alleles found in each germplasm group
represent a great reservoir of untapped genetic resources for maize
improvement, and implications for,hybrid breeding are discussed.
@article{ISI:000254855500025,
abstract = {CIMMYT is the source of improved maize (Zea mays L.) breeding material
for a significant portion of the nontemperate maize growing world.
Landraces which did not serve as sources for improved maize germplasm
may contain untapped allelic variation useful for future breeding
progress. Information regarding levels of diversity in different
germplasm would help to identify sources for broadening improved
breeding pools and in seeking genes and alleles that have not been
tapped in modern maize breeding. The objectives of this study were to
examine the diversity in maize landraces, modern open pollinated
varieties (OPVs), and inbred lines adapted to nontemperate growing
areas to find unique sources of allelic diversity that may be used in
maize improvement. Twenty-five simple sequence repeat markers were used
to characterize 497 individuals from 24 landraces of maize from Mexico,
672 individuals from 23 CIMMYT improved breeding populations, and 261
CIMMYT inbred lines. Number of alleles, gene diversity per locus,
unique alleles per locus, and population structure all differ between
germplasm groups. The unique alleles found in each germplasm group
represent a great reservoir of untapped genetic resources for maize
improvement, and implications for,hybrid breeding are discussed.},
added-at = {2008-07-18T09:35:28.000+0200},
author = {Warburton, M. L. and Peif, J. C. and Frisch, M. and Bohn, M. and Bedoya, C. and Xia, X. C. and Crossa, J. and Franco, J. and Hoisington, D. and Pixley, K. and Taba, S. and Melchinger, A. E.},
biburl = {https://www.bibsonomy.org/bibtex/26ea551c58444d5cc3f43c6a42d9476c3/ifzbiometrie},
interhash = {9b6e876b6e9ea07a17a8ee22d79cf143},
intrahash = {6ea551c58444d5cc3f43c6a42d9476c3},
issn = {0011-183X},
journal = {CROP SCIENCE},
keywords = {IFZ imported},
number = 2,
pages = {617-624},
timestamp = {2008-07-18T14:00:15.000+0200},
title = {Genetic diversity in CIMMYT nontemperate maize germplasm: Landraces, open pollinated varieties, and inbred lines},
volume = 48,
year = 2008
}