"5536","12","archive","30",,,"disk0/00/00/55/36","2012-02-17 11:15:00","2012-02-17 11:15:00","2012-02-17 11:15:00","article",,,"show","Library-ICRISAT@cgiar.org",,,"","","","","","","","","","",,,,"Farkhari","Md","","","","","","","Shah","T",,,"","",,,,,"","",,,,,"","","CIMMYT(Mexico)","Mexico","Recombination frequency variation in maize as revealed by genomewide single-nucleotide polymorphisms","pub","s2.6","","","restricted",,,"recombination frequency;integrated linkage map;selection;centromere;maize",,"The SNP chips used in this study were developed through a
collaborative project between Institute for Genomic Diversity, Cornell
University (Ed. Buckler) and CIMMYT (Marilyn Warburton andJianbing Yan). Two RIL populations, �C5� (Ac7643 · Ac7729/
TZSRW) and �C6� (CML444 · Malawi), were developed at CIMMYT
for maize DT project (Jean-Marcel Ribaut). Dr Jonathan Crouch
provided a comprehensive review on the draft manuscript. We thank
Eva Huerta Miranda, Carlos Martinez Flores, Martha Hernandez
Rodrı´guez, Alberto Vergara Alva, Maria Asuncio´ n Moreno Ortega
and Jose Simon Pastrana Marias for laboratory and field assistance.
This work was funded by the Rockefeller Foundation, the Bill and
Melinda Gates Foundation, and the European Community, and
through other attributed or unrestricted funds provided by donors of
the Consultative Group on International Agricultural Research
(CGIAR) especially the national governments of USA, Japan and
UK. Mohammad Farkhari and Yanli Lu as joint PhD students were
partially supported by Ministry of Science, Research and Technology
of Iran and China Scholarship Council, respectively, for their research
at CIMMYT, Mexico.","Recombination frequency greatly affects selection efficiency in plant breeding. A high-density single-nucleotide polymorphism (SNP) map integrated with physical map and other molecular maps is very useful for characterizing genetic recombination variation. In this study, recombination frequency in maize was investigated through SNP linkage maps constructed with three recombinant inbred line populations. The integrated map consisted of 1443 molecular markers, including 1155 SNPs, spanning 1346 cM. A 100-fold difference in recombination frequency was observed between different chromosomal regions, ranging from an average of 0.09 cM/Mb for pericentromeric regions to 7.08 cM/Mb for telomeric regions. Recombination suppression in non-centromeric regions identified nine recombination-suppressed regions, one of which likely contained condensed heterochromatin (knobs). Recombination variation along chromosomes was highly predictable for pericentromeric and telomeric regions, but population-specific with 4.5-fold difference for the same marker interval across the three populations or specific chromosome regions because of the presence of knobs. As recombination variation can be identified and well characterized as shown in this study, the related information will facilitate future genetic studies, gene cloning and marker-assisted plant breeding.
","2011","published",,"Plant Breeding","130","5","Blackwell Publishing",,"533-539",,,,,,,,,,,"TRUE",,"1439-0523",,,,,,"","http://dx.doi.org/10.1111/j.1439-0523.2011.01866.x","http://scholar.google.co.in/scholar?as_q=%22Recombination+frequency+variation+in+maize+as+revealed+by+genomewide+single-nucleotide+polymorphisms%22&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=","author",,"Rockefeller Foundation","",,,,,,"",,,,,,,"",,,,,"",,,,,"","",,,,,"","",,,,,
"5536",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"et al",".","","",,,,,,,,,,,,,,,,,,,,,,,"University of Tehran(Karaj)","Iran",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Bill and Melinda Gates Foundation",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"5536",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Sichuan Agricultural University(Chengdu)","China",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"European Community",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"5536",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"ICRISAT(Patancheru)","India",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Consultative Group on International Agricultural Research ",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"5536",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"CAAS(Bejing)",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Goverment of Iran-Ministry of Science, Research and Technology",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"5536",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"China Scholarship Council",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,