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Titolo:
Analysis of factors influencing milling yield and their association to other traits by QTL analysis in two hexaploid oat populations
Autore:
Groh, S; Kianian, SF; Phillips, RL; Rines, HW; Stuthman, DD; Wesenberg, DM; Fulcher, RG;
Indirizzi:
Univ Minnesota, Dept Agron & Plant Genet, St Paul, MN 55108 USA Univ Minnesota St Paul MN USA 55108 & Plant Genet, St Paul, MN 55108 USA Univ Minnesota, Inst Plant Mol Genet, St Paul, MN 55108 USA Univ Minnesota St Paul MN USA 55108 lant Mol Genet, St Paul, MN 55108 USA USDA ARS, Plant Sci Res Unit, St Paul, MN 55108 USA USDA ARS St Paul MN USA 55108 , Plant Sci Res Unit, St Paul, MN 55108 USA USDA ARS, Natl Small Grains Germplasm Res Facil, Aberdeen, ID 83210 USA USDA ARS Aberdeen ID USA 83210 ermplasm Res Facil, Aberdeen, ID 83210 USA Univ Minnesota, Dept Food Sci & Nutr, St Paul, MN 55108 USA Univ Minnesota St Paul MN USA 55108 ood Sci & Nutr, St Paul, MN 55108 USA N Dakota State Univ, Dept Plant Sci, Fargo, ND 58105 USA N Dakota State Univ Fargo ND USA 58105 ept Plant Sci, Fargo, ND 58105 USA
Titolo Testata:
THEORETICAL AND APPLIED GENETICS
fascicolo: 1, volume: 103, anno: 2001,
pagine: 9 - 18
SICI:
0040-5752(200107)103:1<9:AOFIMY>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
BETA-GLUCAN CONTENT; LOCI;
Keywords:
Avena sativa; grain quality; kernel morphology; milling yield; QTL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Phillips, RL Univ Minnesota, Dept Agron & Plant Genet, 1991 Upper Buford Circle, St Paul, MN 55108 USA Univ Minnesota 1991 Upper Buford Circle St Paul MN USA 55108
Citazione:
S. Groh et al., "Analysis of factors influencing milling yield and their association to other traits by QTL analysis in two hexaploid oat populations", THEOR A GEN, 103(1), 2001, pp. 9-18

Abstract

Milling yield, or the grain weight from which 100 kg of rolled groats is obtained upon milling. is an important quality characteristic of cultivated oat (Avena sativa L.). Kernel morphology and the groat (caryopsis) percentage of the whole kernel including hull are factors that influence milling yield. We mapped QTLs for kernel area, kernel length, kernel width, and groatpercentage in two populations of 137 recombinant inbred lines by RFLP and AFLP analysis to evaluate the prospects of marker-assisted selection (MAS). Phenotypic correlations between kernel morphology traits and groat percentage were not significant. For kernel morphology traits and groat percentage, one to five QTLs were detected, explaining 7.0-60.7% of the total phenotypic variance depending on the trait. One QTL for kernel length in each population and one QTL for kernel width in one population were found at the same location as a QTL for groat percentage., indicating that a change in kernel size or shape could have an influence on groat percentage. The positionsand effects of QTLs for kernel morphology and groat percentage were compared to QTLs detected previously for chemical grain composition (oil and P-glucan concentration) and agronomic traits to evaluate the selection responseon these traits through MAS. Several regions of the oat genome were identified that contained clusters of QTLs influencing two or more traits. While the allele from one parent at a QTL could simultaneously improve two or more traits in one population. it could have opposite effects on the same traits at another QTL or in the other population. Associations among traits were complex and will require careful consideration when employing QTL-marker associations in MAS to avoid negative selection response. Future research to discover candidate genes for those QTL clusters could provide informationabout trait associations and help in designing selection programs.

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Documento generato il 09/04/20 alle ore 13:24:57