Quantitative trait loci for agronomic and seed quality traits in an F-2 and F-4 : 6 soybean population

Chapman, A., Pantalone, V. R., Ustun, A., Allen, F. L., Landau-Ellis, D., Trigiano, R. N. and Gresshoff, P. M. (2003) Quantitative trait loci for agronomic and seed quality traits in an F-2 and F-4 : 6 soybean population. Euphytica, 129 3: 387-393. doi:10.1023/A:1022282726117

Author Chapman, A.
Pantalone, V. R.
Ustun, A.
Allen, F. L.
Landau-Ellis, D.
Trigiano, R. N.
Gresshoff, P. M.
Title Quantitative trait loci for agronomic and seed quality traits in an F-2 and F-4 : 6 soybean population
Journal name Euphytica   Check publisher's open access policy
ISSN 0014-2336
Publication date 2003-02
Sub-type Article (original research)
DOI 10.1023/A:1022282726117
Volume 129
Issue 3
Start page 387
End page 393
Total pages 7
Place of publication Dordrecht
Publisher Kluwer Academic Publishers
Collection year 2003
Language eng
Subject C1
270207 Quantitative Genetics
620108 Grain legumes
Abstract Molecular breeding is becoming more practical as better technology emerges. The use of molecular markers in plant breeding for indirect selection of important traits can favorably impact breeding efficiency. The purpose of this research is to identify quantitative trait loci (QTL) on molecular linkage groups (MLG) which are associated with seed protein concentration, seed oil concentration, seed size, plant height, lodging, and maturity, in a population from a cross between the soybean cultivars 'Essex' and 'Williams.' DNA was extracted from F-2 generation soybean leaves and amplified via polymerase chain reaction (PCR) using simple sequence repeat (SSR) markers. Markers that were polymorphic between the parents were analyzed against phenotypic trait data from the F-2 and F-4:6 generation. For the F-2 population, significant additive QTL were Satt540 (MLG M, maturity, r(2)=0.11; height, r(2)=0.04, seed size, r(2)=0.061, Satt373 (MLG L, seed size, r(2)=0.04; height, r(2)=0.14), Satt50 (MLG A1, maturity r(2)=0.07), Satt14 (MLG D2, oil, r(2)=0.05), and Satt251 (protein r(2)=0.03, oil, r(2)=0.04). Significant dominant QTL for the F-2 population were Satt540 (MLG M, height, r(2)=0.04; seed size, r(2)=0.06) and Satt14 (MLG D2, oil, r(2)=0.05). In the F-4:6 generation significant additive QTL were Satt239 (MLG I, height, r(2)=0.02 at Knoxville, TN and r(2)=0.03 at Springfield, TN), Satt14 (MLG D2, seed size, r(2)=0.14 at Knoxville, TN), Satt373 (MLG L, protein, r(2)=0.04 at Knoxville, TN) and Satt251 (MLG B I, lodging r(2)=0.04 at Springfield, TN). Averaged over both environments in the F-4:6 generation, significant additive QTL were identified as Satt251 (MLG B 1, protein, r(2)=0.03), and Satt239 (MLG 1, height, r(2)=0.03). The results found in this study indicate that selections based solely on these QTL would produce limited gains (based on low r(2) values). Few QTL were detected to be stable across environments. Further research to identify stable QTL over environments is needed to make marker-assisted approaches more widely adopted by soybean breeders.
Keyword Agronomy
Plant Sciences
Soybean Breeding
Ssr Markers
Glycine-max L
Q-Index Code C1

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Created: Tue, 14 Aug 2007, 19:09:37 EST