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ARS Home » Pacific West Area » Pullman, Washington » Grain Legume Genetics Physiology Research » Research » Publications at this Location » Publication #77452


item Muehlbauer, Frederick

Submitted to: Journal of Genetics and Breeding
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 10/18/1994
Publication Date: N/A
Citation: N/A

Interpretive Summary: Economically important traits in crop plants are often controlled by more than one gene. For crop improvement purposes, the location and effects of those genes is a primary consideration by breeders. In this study we located the genes that influence the expression of time to flowering and maturity, biomass and seed yield, the ratio of seed yield to straw yield and seed weight. The availability of this information will enable breeders of lentil to more accurately develop varieties with improved yields and timeliness of harvest.

Technical Abstract: Associations with isozyme markers were used to identify loci that affect development of economically important traits in lentil (Lens culinaris Medik). Ten sets of backcross inbred lines were developed from three interspecfic (L. culinaris x L. orientalis Boiss.) hybrids. Six sets were derived from Brewer' x Lo-4 cross, one was derived Brewer' x Lo-77 cross, ,and from Giza-9' x Lo-78 cross. The backcross inbred lines in each set differed for alleles at a different isozyme locus. In each set the inbred lines were characterized for days to flowering and maturity, plant height, biomass, seed yield, harvest index, and seed weight. The association of quantitative traits with the isozyme marker locus was determined, as indicated by t-test for each pairwise combination of a quantitative trait with the marker locus. Five of the 10 marker loci (Gal 1, Gal 2, Pgm c, Pg p, Lap 1) showed significant association with one or more quantitative traits. At least one locus was detected affecting the variation in days t flower, days to maturity and plant height. Two to three effective loci wer detected for biomass, seed yield, harvest index, and seed weight. The tentative position of the detected quantitative trait loci on the lentil genetic map was determined by the known position of the isozyme loci in various linkage groups. The loci affecting days to flower were positioned on linkage group 1, whereas the loci affecting days to maturity and plant height were located on linkage group 5. The loci responsible for variation in biomass, seed yield, harvest index, and seed weight were located on linkage groups 1, 4, 5 and 7. The results indicated that detection and mapping of quantitative trait loci in lentil can be used to clarify the inheritance of economically important traits.