Milling and baking quality attributes of soft red winter wheat bulk populations and derived lines.
1992
Bruckner P.L. | Finney P.L.
Little information is available concerning relationships between milling and baking quality of soft red winter (SRW) wheat (Triticum aestivum L.) bulk populations and quality of lines derived in subsequent generations. Experiments were conducted to determine if quality evaluation of F4 bulk populations could provide useful information on quality potential of F5 lines. This would allow SRW wheat breeders using bulk systems of generation advance to develop appropriate selection strategies. Fifty-eight F4 SRW wheat bulk populations were grown at Plains, GA, in 1988-1989. Milling and baking quality of each population was evaluated at the USDA-ARS Soft Wheat Quality Laboratory. Random F4:5 headrows from eight populations with diverse F4 bulk quality characteristics were grown in 1989-1990 at Tifton, GA, and similarly evaluated for milling and baking quality. Except for flour protein concentration, quality attributes of F4 bulk populations were significantly correlated with means of F5 lines derived from each population. Bulk populations with quality deficiencies produced higher proportions of lines with similar quality deficiencies. Higher proportions of lines with adequate and superior quality were identified in progenies of bulk populations having good quality. Milling and baking qualities of F5 lines derived from populations with only 50% SRW wheat parentage were more variable and less predictable based on F4 bulk evaluation than quality of F5 lines derived from populations of 100% SRW wheat parentage. Milling and baking quality of F4 bulk populations was indicative of the quality and potential of F5 lines derived from each bulk. Bulk evaluation could be used to cull low-quality-potential populations before line derivation.
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