Use of SSRs for establishing heterotic groups in subtropical maize.

Use of SSRs for establishing heterotic groups in subtropical maize. Research Abstract Details 

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Use of SSRs for establishing heterotic groups in subtropical maize. Abstract Text:

J C Reif,A E Melchinger,X C Xia,M L Warburton,D A Hoisington,S K Vasal,D Beck,M Bohn,M Frisch,

Heterotic groups and patterns are of fundamental importance in hybrid breeding. The objectives of our research were to: (1) investigate the relationship of simple sequence repeats (SSR) based genetic distances between populations and panmictic midparent heterosis (PMPH) in a broad range of CIMMYT maize germplasm, (2) evaluate the usefulness of SSR markers for defining heterotic groups and patterns in subtropical germplasm, and (3) examine applications of SSR markers for broadening heterotic groups by systematic introgression of other germplasm. Published data of two diallels and one factorial evaluated for grain yield were re-analyzed to calculate the PMPH in population hybrids. Additionally, 20 pools and populations widely used in CIMMYT's breeding program were assayed with 83 SSR markers covering the entire maize genome. Correlations of squared modified Roger's distance (MRD(2)) and PMPH were mostly positive and significant, but adaption problems caused deviations in some cases. For intermediate- and early-maturity subtropical germplasm, two heterotic groups could be suggested consisting of a flint and dent composite. We concluded that the relationships between the populations obtained by SSR analyses are in excellent agreement with pedigree information. SSR markers are a valuable complementation to field trials for identifying heterotic groups and can be used to introgress exotic germplasm systematically.

Use of SSRs for establishing heterotic groups in subtropical maize. Publishing Authors By Initials

JC Reif,AE Melchinger,XC Xia,ML Warburton,DA Hoisington,SK Vasal,D Beck,M Bohn,M Frisch,

For similar plants: plant families and groups: angiosperms: poaceae: zea mays research abstracts see: plants: plant families and groups: angiosperms: poaceae: zea mays research

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Use of SSRs for establishing heterotic groups in subtropical maize. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: TAG. Theoretical and applied genetics. Theoretisch

VOLUME: 107

Page Numbers: 947-57

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ISSN: 0040-5752

DAY: 27

MONTH: 06

YEAR: 2003

Use of SSRs for establishing heterotic groups in subtropical maize. Information

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LANGUAGE: eng

NlmUniqueID: 145600

Use of SSRs for establishing heterotic groups in subtropical maize. Keywords Mesh Terms:

KEYWORDS: Zea mays

MESH TERMS: growth & development

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Grant and Affiliation Information for Use of SSRs for establishing heterotic groups in subtropical maize.

AFFILIATION: Institute of Plant Breeding, Seed Science, and Population Genetics, University of Hohenheim, 70593 Stuttgart, Germany.

Country: Germany

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MEDLINETA: Theor Appl Genet

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