|ECHEVERRY-SOLARTE, MORGAN - North Dakota State University|
|KUMAR, AJAY - North Dakota State University|
|SIMSEK, SENAY - North Dakota State University|
|ALAMARI, MOHAMMED - North Dakota State University|
|MANTOVANI, EDER - North Dakota State University|
|MCCLEAN, PHILLIP - North Dakota State University|
|DECKARD, EDWARD - North Dakota State University|
|ELIAS, ELIAS - North Dakota State University|
|SCHATZ, BLAINE - North Dakota State University|
|MERGOUM, MOHAMED - North Dakota State University|
Submitted to: Theoretical and Applied Genetics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/4/2015
Publication Date: 3/5/2015
Publication URL: http://doi 10.1007/s00122-015-2478-0
Citation: Echeverry-Solarte, M., Kumar, A., Kianian, S., Simsek, S., Alamari, M.S., Mantovani, E., McClean, P., Deckard, E., Elias, E., Schatz, B., Xu, S.S., Mergoum, M. 2015. New QTL alleles for quality-related traits in spring wheat revealed by RIL population derived from supernumerary x non-supernumerary spikelet genotypes. Theoretical and Applied Genetics. 128:893-912.
Interpretive Summary: In order to improve cultivate wheat, exotic germplasm are looked at for traits of importance. In this study an exotic line carrying genes for increased number of florets and seeds was analyzed. This study identifed a number of genes related to wheat quality traits. A number of new genes/alleles for improved quality traits were identified that can potentially be used in a marker assisted breeding programs to improve elite wheat germplasm.
Technical Abstract: Identifying new QTLs and alleles in exotic germplasm is paramount for further improvement of quality traits in wheat. In the present study, a RIL population developed from a cross of an elite wheat line (WCB414) and an exotic genotype with supernumerary spikelets (SS) was used to identify QTLs and new alleles for eight quality traits. Composite interval mapping for thousand kernels weight (TKW), kernel volume weight (KVW), grain protein content (GPC), percent of flour extraction (FE) and four mixograph-related traits identified a total of 69 QTLs including 19 stable QTLs. These QTLs were located on 18 different chromosomes (except 4D, 5D, and 6D). Thirteen of these QTLs explained more than 15% of phenotypic variation (PV) and were considered as major QTLs. In this study we identified 12 QTLs for TKW (R2 = 7.2%-17.1%); 10 QTLs for KVW (R2 = 6.7%-22.5%); 11 QTLs for GPC (R2 = 4.7%-16.9%); six QTLs for FE (R2 = 4.8%-19%) and 31 QTLs for mixograph-related traits (R2 = 3.2%-41.2%). Previous identified QTLs in this population for SS, nine spike-related, and 10 agronomic traits were co-located with the 69 quality QTLs. Several QTLs shared genetic regions suggesting pleiotropic effects or closely linkage among loci. The traits GPC and mixogram-related traits were positively correlated with SS. Indeed, several loci for quality traits were co-located with QTL for SS. The exotic parent contributed positive alleles that increased PV of the traits at 56% of loci demonstrating the suitability of germplasm with SS to improve quality traits in wheat.