IBM Mapping Population Details

1. Lee M. Sharopova N. Beavis WD. Grant D. Katt M. Blair D.
Hallauer A. 2002. Expanding the genetic map of maize with the
intermated B73 x Mo17 (IBM) population. Plant Molecular Biology
48(5):453-461, 2002 Mar.

Abstract
    The effects of intermating on recombination and the
development of linkage maps were assessed in maize. Progeny derived
from a common population (B73 x Mo17) before and after five
generations of intermating were genotyped at the same set of 190 RFLP
loci. Intermating resulted in nearly a four-fold increase in the
genetic map distance and increased the potential for improved genetic
resolution in 91% of the intervals evaluated. This mapping population
and related information should connect research involving dense
genetic maps, physical mapping, gene isolation, comparative genomics,
analysis of quantitative trait loci and investigations of heterosis.

2. Sharopova N. McMullen MD. Schultz L. Schroeder S.
Sanchez-Villeda H. Gardiner J. Bergstrom D. Houchins K.
Melia-Hancock S. Musket T. Duru N. Polacco M. Edwards K. Ruff T.
Register JC. Brouwer C. Thompson R. Velasco R. Chin E. Lee M.
Woodman-Clikeman W. Long MJ. Liscum E. Cone K. Davis G. and Coe,
E.H. Jr. 2002. Development and mapping of SSR markers for maize
Plant Molecular Biology. 48(5):463-481, 2002 Mar.

Abstract
    Microsatellite or simple sequence repeat (SSR) markers have
wide applicability for genetic analysis in crop plant improvement
strategies. The objectives of this project were to isolate,
characterize, and map a comprehensive set of SSR markers for maize
(Zea mays L.). We developed 1051 novel SSR markers for maize from
microsatellite-enriched libraries and by identification of
microsatellite-containing sequences in public and private databases.
Three mapping populations were used to derive map positions for 978
of these markers. The main mapping population was the intermated B73
x Mo17 (IBM) population. In mapping this intermated recombinant
inbred line population, we have contributed to development of a new
high-resolution map resource for maize. The primer sequences,
original sequence sources, data on polymorphisms across 11 inbred
lines, and map positions have been integrated with information on
other public SSR markers and released through MaizeDB at
URL: www.agron.missouri.edu. The maize research community now has the
most detailed and comprehensive SSR marker set of any plant species.