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The timing of flag leaf senescence (FLS) is an important determinant of yield under stress and optimal environments. A doubled haploid population derived from crossing the photo period-sensitive variety Beaver,with the photo period-insensitive variety Soissons, varied significantly for this trait, measured as the percent green flag leaf area remaining at 14 days and 35 days after anthesis. This trait...
Molecular markers bring new information on the determinism of trait variation and the organisation of genetic diversity within plant species of agricultural interest. We review here how this information can be used to increase the efficiency of plant breeding programs, considering both theoretical analyses and recent experimental data. Use of mapping information to assemble alleles of interest is...
A program was initiated in 1994 to compare the efficiency of marker-assisted selection (MAS) and conventional phenotypic selection. A population of 300 F3:4 families was generated from the cross between two maize inbred lines F2 and F252 and selected on an index combining grain yield and grain moisture at harvest. This population was characterised for 93 RFLP markers and evaluated as testcrosses in...
Net blotch, caused by Pyrenophora teres f. teres, is a damaging foliar disease of barley worldwide. It is important to identify resistance germplasm and study their genetics. 'Chevron', a six-rowed barley used as a parent for the production of a doubled haploid (DH) population for mapping of Fusarium head blight (FHB) resistance, was also found to be resistant to net blotch. To map the resistance...
We have identified a locus for asynchronous heading in rice. The length of heading period in a plant was measured as the indicator of asynchronous heading in 98 backcross inbred lines (BILs). These lines were derived using a single-seed descent method from a backcross of (japonica Nipponbare/indica Kasalath)/Nipponbare, and we used this mapping population in quantitative trait locus (QTL) analysis...
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