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Bryan Stobaugh Luciano M Jaureguy Liliana Florez-Palacios Moldir Orazaly Ailan Zeng 《Journal of Crop Improvement》2018,32(1):33-49
The economic value of a soybean [Glycine max (L.) Merr.] crop depends on yield and quality. The objectives of this study were to evaluate soybean lines for protein and oil content and to examine the break-even (BE) analysis of these traits combined with yield. Forty lines of maturity group (MG) IV or V were grown at four Arkansas locations for two years. Yield, protein, and oil content of each line were determined and compared to the check average for a BE comparison of the total economic value of the line. Results showed six profitable lines ($8.40 to $54.96 per metric ton based on yield) in 2008 and six profitable lines ($0.49 to $61.19 per metric ton based on yield) in 2009. Overall, in both MG, high-protein lines needed to yield more to be profitable, whereas high-oil lines had competitive yield, protein and oil content; R00-764 (MG IV), R05-71 (MG V), and R02-6185F (MG V) were competitive without added premiums. 相似文献
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Seed calcium content and hardness constitute determining characteristics of soybean [Glycine max (L.) Merr.] texture affecting soyfood quality. Molecular markers linked to these traits will accelerate breeding of soybeans for the soyfood market through the use of marker-assisted selection (MAS). Confirmation of linked markers and validation of quantitative trait loci (QTL), prior to their application through MAS, are the keys. The objectives of this study were to confirm previously reported QTL for calcium content and seed hardness and investigate the relationship between these traits. Evaluation of seven recombinant inbred line (RIL) populations with different genetic backgrounds, grown in two Arkansas locations for 2 years, showed inconsistent correlations between these traits. In general, a positive correlation was found in most of the populations and correlation was significant in six populations. Combined data showed a positive correlation between calcium content and seed hardness (r = 0.23 – 0.49). Furthermore, previously reported QTL for calcium content and/or hardness were evaluated in six different sub-populations and stable markers across environments were identified for potential use in MAS. Based on our results, markers Satt267 and Sat_345 on chromosome 1, Sat_288 on chromosome 7, Sat_228, Satt341, and Sat_392 on chromosome 8, Satt547 on chromosome 16, and Satt002 on chromosome 17, are reliable for calcium content selection; whereas, Satt267, Satt680, Satt341, and Sct_010 on chromosomes 1, 7, 8, and 19, respectively, can be used for selection for seed hardness. Findings of this research will facilitate MAS for seed calcium content and hardness in breeding programs aimed at improving food-grade soybeans. 相似文献
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Soybeans (Glycine max (L.) Merr.) are mainly grown for protein and oil purposes. The objectives of this study were to: 1) evaluate maturity group (MG) IV and V soybean genotypes for traits associated with local adaptability (yield, plant height, and maturity), and 2) determine seed protein and oil concentrations, their correlation with yield, and respective heritabilities. A total of 40 MG IV or V genotypes were evaluated in four Arkansas locations in 2008 and 2009. The results showed that the genotype x year x location effect was significant for all traits studied, except maturity. Protein and oil concentrations were negatively correlated (?0.91) and highly heritable (0.89–0.93 and 0.82–0.83, respectively). Four promising high-yielding genotypes with moderately high to high protein or oil levels were identified: R05-4682 (high protein) and R05-4256 (high oil) in the MG IV test, and R05-1772 (high protein) and R05-71 (high oil) in the MG V test. These genotypes could potentially bring added value to Arkansas farmers’ fields. 相似文献
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Identification and confirmation of quantitative trait loci for stachyose content in soybean seed 
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下载免费PDF全文 Ailan Zeng Pengyin Chen Bo Zhang Moldir Orazaly Liliana Florez‐Palacios Kristofor R. Brye 《Plant Breeding》2015,134(2):178-185
Stachyose is an unfavorable sugar in soybean meal that causes flatulence for non‐ruminant animals. Understanding the genetic control of stachyose in soybean will facilitate the modification of stachyose content at the molecular level. The objective of this study was to identify quantitative trait loci (QTL) associated with seed stachyose content using simple sequence repeat (SSR) and single nucleotide polymorphism (SNP) markers. A normal stachyose cultivar, ‘Osage’, was crossed with a low stachyose line, V99‐5089, to develop a QTL mapping population. Two parents were screened with 33 SSR and 37 SNP markers randomly distributed on chromosome 10, and 20 SSR and 19 SNP markers surrounding a previously reported stachyose QTL region on chromosome 11. Of these, 5 SSR and 16 SNP markers were used to screen the F3:4 lines derived from ‘Osage’ x V99‐5089. Seed samples from F3:5 and F3:6 lines were analyzed for stachyose content using high‐performance liquid chromatography (HPLC). Composite interval mapping analysis indicated that two stachyose QTL were mapped to chromosome 10 and 11, explaining 11% and 79% of phenotypic variation for stachyose content, respectively. The SSR/SNP markers linked to stachyose QTL could be used in breeding soybean lines with desired stachyose contents. Chi‐square tests further indicated that these two QTL probably represent two independent genes for stachyose content. Therefore, a major QTL was confirmed on chromosome 11 and a novel QTL was found on chromosome 10 for stachyose content. 相似文献
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