eprintid: 5523
rev_number: 9
eprint_status: archive
userid: 30
dir: disk0/00/00/55/23
datestamp: 2012-02-16 15:42:53
lastmod: 2012-02-16 15:42:53
status_changed: 2012-02-16 15:42:53
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@cgiar.org
creators_name: Wen, W
creators_name: et al, .
icrisatcreators_name: Shah, T
affiliation: CIMMYT(Mexico)
affiliation: Universitat de Barcelona(Barcelona)
affiliation: Huazhong Agricultural University(Wuhan) 
affiliation: ICRISAT(Patancheru)
country: Mexico
country: Spain
country: China
country: India
title: Molecular Characterization of a Diverse Maize Inbred Line Collection and its Potential Utilization for Stress Tolerance Improvement
ispublished: pub
subjects: s2.6
full_text_status: restricted
note: This study was supported in part by the Drought-Tolerant
Maize for Africa project (DTMA), funded by the Bill and
Melinda Gates Foundation. We are grateful to Pedro Chepetla’s
team (CIMMYT Tlaltizapán Experimental Station) for their
helpful contribution in field experiments.
abstract: A diverse collection of 359 advanced maize (Zea mays L.) inbred lines from the International Maize and Wheat Improvement Center (CIMMYT) and International Institute for Tropical Agriculture (IITA) breeding programs for drought, low N, soil acidity (SA), and pest and disease resistance was genotyped using 1260 single nucleotide polymorphism (SNP) markers. Model-based population partition, neighbor-joining (NJ) clustering, and principal component analysis (PCA) based on the genotypic data were employed to classify the lines into subgroups. A subgroup largely consisting of lines developed from La Posta Sequía (LPS) consistently separated from other lines when using different methods based on both SNP and SNP haplotype data. Lines related by pedigree tended to cluster together. Nine main subsets of lines were determined based on pedigree information, environmental adaptation, and breeding scheme. Analysis of molecular variance (AMOVA) revealed that variation within these subsets was much higher than that among subsets. Genetic diversity and linkage disequilibrium (LD) level were tested in the whole panel and within each subset. The potential of the panel for association mapping was tested using 999 SNP markers with minor allelic frequency (MAF) ≥ 0.05 and phenotypic data (grain yield [GY], ears per plant [EPP], and anthesis to silking interval [ASI]). Results show the panel is ideal for association mapping where type I error can be controlled using a mixed linear model (Q + K). Use of pedigree, heterotic group, and ecological adaptation information together with molecular characterization of this panel presents a valuable genetic resource for stress tolerance breeding in maize.
date: 2011
date_type: published
publication: Crop Science
volume: 51
number: 6
publisher: Crop Science Society of America
pagerange: 2569-2581
refereed: TRUE
issn: 0011-183X
official_url: http://dx.doi.org/10.2135/cropsci2010.08.0465
related_url_url: http://scholar.google.co.in/scholar?as_q=%22Molecular+Characterization+of+a+Diverse+Maize+Inbred+Line+Collection+and+its+Potential+Utilization+for+Stress+Tolerance+Improvement%22&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&
related_url_type: author
funders: Bill and Melinda Gates Foundation
projects: Drought-Tolerant Maize for Africa project
citation:   Wen, W and et al, .  (2011) Molecular Characterization of a Diverse Maize Inbred Line Collection and its Potential Utilization for Stress Tolerance Improvement.  Crop Science, 51 (6).  pp. 2569-2581.  ISSN 0011-183X     
document_url: http://oar.icrisat.org/5523/1/Crop_science_51_2011.pdf