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United States Department of Agriculture

Agricultural Research Service

Research Project: GENETIC DISSECTION OF HETEROTIC EFFECTS IN UPLAND COTTON

Location: Coastal Plain Soil, Water and Plant Conservation Research

Project Number: 6657-21000-006-11
Project Type: Reimbursable

Start Date: Jan 01, 2012
End Date: Dec 31, 2012

Objective:
Genetically characterize yield heterotic effects in an elite Upland x elite Upland cotton cross.

Approach:
Previously, a NC Design III backcross mapping population was constructed from 286 F2 plants derived from an elite-by-elite Upland cotton cross known to exhibit large yield heterosis. DNA was extracted from each F2 plant and approximately 580 NC Design III progeny rows were seed increased. The 286 F2 plants will be genotyped with molecular markers deemed polymorphic between the elite Upland parental lines. A molecular linkage map will be constructed. Also, the NC Design III progeny rows will be evaluated for yield, yield component traits, and fiber quality traits in field trials conducted in South Carolina, Louisiana, and Arizona. Heterotic effects for these traits will be calculated. Finally, the molecular linkage map and field data will be used in a quantitative trait loci (QTL) analysis to identify genomic regions associated with heterotic effects for yield, yield component, and fiber quality traits.

Last Modified: 9/22/2014
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