Download or read book Selection for Soybean Seed Yield with Molecular Markers written by Joseph Richard Byrum and published by . This book was released on 1999 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular markers may facilitate the identification of and selection for quantitative trait loci (QTL) that control economically important traits. The objective of the study was to compare the efficiency of selection among soybean [Glycine max (L.) Merrill] lines for seed yield based on single replication progeny-row-yield tests (PRYT), molecular marker loci selected by pedigree analysis, and a combination of PRYT and molecular marker data. A total of 380 random F3-derived lines from three populations were evaluated in the PRYTat Ames, IA, in 1997 and were genotyped for simple sequence repeats (SSRS) that had been chosen by pedigree analysis for their association with seed yield. The lines were divided into 13 tests for evaluation in 1998 at five or six Midwest locations in replicated yield tests. The average phenotypic correlation coefficient between the mean yield of lines in the 1998 test and their PRYT yield was 0.24, molecular marker score was 0.19, and index value was 0.35. The index was superior on the average to the PRYT or molecular marker score individually for selection of the highest yielding lines in the 1998 tests. The selection differential based on the index was superior on the average to the PRYT or molecular marker score individually in two of the three populations. Marker-QTL associations established by pedigree analysis should be useful alone or in combination with PRYT for selection among lines for seed yield in a cultivar development program.

Download or read book Soybean Breeding written by Felipe Lopes da Silva and published by Springer. This book was released on 2017-06-10 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was written by soybean experts to cluster in a single publication the most relevant and modern topics in soybean breeding. It is geared mainly to students and soybean breeders around the world. It is unique since it presents the challenges and opportunities faced by soybean breeders outside the temperate world.

Download or read book Genetics Genomics and Breeding of Soybean written by Kristin Bilyeu and published by CRC Press. This book was released on 2016-04-19 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: The soybean is an economically important leguminous seed crop for feed and food products that is rich in seed protein (about 40 percent) and oil (about 20 percent); it enriches the soil by fixing nitrogen in symbiosis with bacteria. Soybean was domesticated in northeastern China about 2500 BC and subsequently spread to other countries. The enormous

Download or read book Detection of Soybean Amino Acid QTLs and Seed Yield QTLs Using Selective Genotyping written by Benjamin David Fallen and published by . This book was released on 2012 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Census Bureau projects the worlds population will top more than nine billion by 2050. Today, soybeans account for 56 % of the world oilseed production and 68 % of the world protein meal consumption, with U.S. soybean production accounting for 33 % of the world soybean production. So, to meet the demand of the worlds growing population and of the livestock industry improvements in both the composition and the yield of soybean is essential. The primary objective of this project was to use molecular markers to identify genomic regions associated with amino acid composition and yield in soybean. For amino acid quantitative trait loci (QTL) detection 282 F59recombinant inbred lines (RIL) developed from a cross between Essex and Williams 82 were used. The Universal Soy Linkage Panel (USLP) 1.0 of 1536 single nucleotide polymorphic markers (SNPs) was used to identify 480 polymorphic molecular genetic markers and to genotype the 282 RILs. A total of ten QTL were detected on chromosomes 5, 7, 9, 10, 13 and 20 that explained 5 to 14 % of the total phenotypic variation for a particular amino acid. To detect yield QTL 875 F59 RIL developed from a cross between Essex and Williams 82 were used. The 875 RILs were divided into four groups based on maturity and each group was grown in Knoxville, TN and one other location of adaptability. Each RIL was genotyped with>50,000 SNPs of which 17,232 were polymorphic across the population. A total of forty-six yield QTLs were detected in this study, explaining 4.5 % to 11.9% of the phenotypic variation for yield. In addition, marker assisted selections (MAS) were made using only additive effects and using a yield prediction model (YPM) in each environment and across environments for each group. By including additive by additive effects in addition to additive effects into the YPM, more top yielding lines were selected than by just using only additive effects. This study provides new information concerning amino acid research in soybean and may offer some important insights into using an YPM that includes epistasis in soybean.

Download or read book Marker Assisted Selection for Seed Yield in Soybean Glycine Max L Merr Plant Row Yield Trials written by Jason D. Neus and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantitative trait loci (QTL) controlling seed yield in soybean [Glycine max (L.) Merr.] have been difficult to confirm among populations. Our objective was to determine whether a method of marker-assisted selection (MAS) for seed yield in elite lines would be applicable to selection in soybean plant row yield trials (PRYTs). Lines from two populations with elite parents were grown in PRYTs in 2008 and tested with markers to identify quantitative trait loci (QTL) associated with seed yield. The first population was tested with 53 single nucleotide polymorphism (SNP) markers and the second population with 26 SNP markers. F-tests were conducted to determine which loci were significantly associated with seed yield in the PRYTs. Lines from each population were then selected from the PRYTs to form five groups from each population: high and low seed yield phenotypes, high and low seed yield genotypes, and random. The five groups from each population were planted at eight diverse locations in 2009. In one population, the mean of the genotypic high group was not statistically different than the phenotypic high group. In the other population, the mean of the genotypic high group was within 90 kg/ha-1 of the mean of the phenotypic high group and was superior to the random group for seed yield. Even with the limited marker coverage, the genotypic selection method used in this study successfully identified lines in PRYTs that would not have been selected due to poor seed yield performance in 2008.

Download or read book Soybean Improvement written by Shabir Hussain Wani and published by Springer Nature. This book was released on 2022-10-17 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean (Glycine max L. (Merr)) is one of the most important crops worldwide. Soybean seeds are vital for both protein meal and vegetable oil. Soybean was domesticated in China, and since last 4-5 decades it has become one of the most widely grown crops around the globe. The crop is grown on an anticipated 6% of the world’s arable land, and since the 1970s, the area in soybean production has the highest percentage increase compared to any other major crop. It is a major crop in the United States, Brazil, China and Argentina and important in many other countries. The cultivated soybean has one wild annual relative, G. soja, and 23 wild perennial relatives. Soybean has spread to many Asian countries two to three thousand years ago, but was not known in the West until the 18th century. Among the various constraints responsible for decrease in soybean yields are the biotic and abiotic stresses which have recently increased as a result of changing climatic scenarios at global level. A lot of work has been done for cultivar development and germplasm enhancement through conventional plant breeding. This has resulted in development of numerous high yielding and climate resilient soybean varieties. Despite of this development, plant breeding is long-term by nature, resource dependent and climate dependent. Due to the advancement in genomics and phenomics, significant insights have been gained in the identification of genes for yield improvement, tolerance to biotic and abiotic stress and increased quality parameters in soybean. Molecular breeding has become routine and with the advent of next generation sequencing technologies resulting in SNP based molecular markers, soybean improvement has taken a new dimension and resulted in mapping of genes for various traits that include disease resistance, insect resistance, high oil content and improved yield. This book includes chapters from renowned potential soybean scientists to discuss the latest updates on soybean molecular and genetic perspectives to elucidate the complex mechanisms to develop biotic and abiotic stress resilience in soybean. Recent studies on the improvement of oil quality and yield in soybean have also been incorporated.

Download or read book Soybean Genetics Newsletter written by and published by . This book was released on 1992 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soybean Seed Composition written by Moulay Abdelmajid Kassem and published by Springer Nature. This book was released on 2022-01-10 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean Seed Composition covers three decades of advances in quantitative trait loci (QTL) mapping of seed protein, oil, fatty acids, amino acids, sugars, mineral nutrients, isoflavones, lunasin, and other beneficial compounds. It opens with coverage of seed protein, oil, fatty acids, and amino acids and the effects that genetic and environmental factors have on them. Detailed discussion of QTL that control seed protein, oil, and fatty acids follows, and the book also covers seed amino acids, macronutrients, micronutrients, sugars, and other compounds that are key to selection for crop improvement. The book also provides an overview of two decades of QTL mapping of mineral deficiencies in soybean, which sheds light on the importance of a balanced mineral nutrition in soybean and other crops, elucidates salt stress tolerance QTL mapping, which is another challenge that faces soybean and other crop production worldwide. The importance of soybean seed isoflavones from their biosynthesis and quantification methods to locations and variations in seeds, roots, and leaves, to their QTL mapping is discussed, as well as providing key information on lunasin, a bioactive anticancer peptide in soybean seeds that will help farmers and breeders to develop soybean cultivars with improved seed isoflavones and lunasin content. The book will be of interest to graduate students, academics, and researchers in the fields of genetic and QTL mapping of important agronomic traits in soybean and other crops.

Download or read book Report of Soybean Seed Research Conference written by Soybean Seed Research Conference and published by . This book was released on 1999 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genomic Selection for Yield and Seed Composition Stability in an Applied Soybean Breeding Program written by Benjamin Mark Harms and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stability traits are of primary importance in plant breeding to ensure consistency in phenotype across a range of environments. However, selection efficiency and accuracy for stability traits can be hindered due to the requirement of obtaining phenotype data across multiple years and environments for proper stability analysis. Genomic selection is a method that allows prediction of a phenotype prior to observation in the field using genome-wide marker data and phenotype data from a training population. To assess prediction of stability traits, two elite-yielding soybean populations developed three years apart in the same breeding program were used. The individuals in each population were tested across three years and seven or more environments, allowing for calculation of observed stability and assessment of prediction accuracy. The primary goal of this research was to provide an overview of genomic selection for yield stability, protein content stability, and oil content stability in an applied soybean breeding program. Factors affecting prediction accuracy were assessed, including SNP density, SNP marker type, and stability measure. Briefly, predictive abilities were low across all stability traits and stability measures for prediction across populations, ranging from -0.01 to 0.37. During applied prediction of non-parametric measures for yield stability, we obtained rank coincidence of roughly 0.65. When individuals in the top half of predicted stability are selected, roughly 65% of those individuals are expected to be in the top half of observed stability. For prediction of protein and oil content stability for static environmental variance stability, we obtained rank coincidence of 0.59 and 0.58. While predictive abilities were too low for use in a breeding program, rank coincidence gave more promising results for applied genomic selection for stability traits. With improvement in methods such as prediction model, SNP type, and greater training and validation phenotype environments, there is potential for genomic selection to effectively improve stability in a breeding program by implementing selection at an early stage when phenotype data are insufficient to select for stability.

Download or read book Soybeans written by Lawrence A. Johnson and published by Elsevier. This book was released on 2015-08-08 with total page 853 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive new soybean reference book disseminates key soybean information to “drive success for soybeans via 23 concise chapters covering all aspects of soybeans--from genetics, breeding and quality to post-harvest management, marketing and utilization (food and energy applications), U.S. domestic versus foreign practices and production methods. The most complete and authoritative book on soybeans Features internationally recognized authors in the 21-chapter book Offers sufficient depth to meet the needs of experts in the subject matter, as well as individuals with basic knowledge of the topic

Download or read book Assessing the Efficiency of Phenotypic and Molecular Genotype Selection Methods for Complex Traits in Soybean written by Catherine Nyaguthii Nyinyi and published by . This book was released on 2011 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean [Glycine max (L.) Merrill] is an important source of protein and oil for both nutritional and industrial applications. Increasing seed yield and protein concentration is the main goal of many soybean breeders to meet market demands. Soybean breeders have occasionally succeeded in producing high yielding cultivars with increased protein content using conventional means despite the negative correlation that exists between these two traits. The efficiency of breeding for seed yield and protein concentration improvement in soybean could be increased using marker assisted selection (MAS) breeding strategies to select genotypes containing favorable alleles for faster cultivar development. The objective of this study was to identify quantitative trait loci (QTL) associated with seed yield, and separately, seed protein concentration and then compare phenotypic selection (PHE) and MAS approaches for seed yield and protein concentration improvement. Two hundred and eighty two F5 derived recombinant inbred lines (RILs) were developed from a cross of Essex [centered x, actual symbol not reproducible] Williams 82 and genotyped with 1586 single nucleotide polymorphism (SNP) markers. The population was divided by days to maturity (10 days) into three tests (early, mid and late) each with 94 genotypes, with one genotype overlapping in maturity in the mid and late tests. In 2009, the three tests, parents and checks were grown in a randomized complete block design (RCBD) in: Fayetteville, AR; Harrisburg, IL and, Knoxville, TN replicated three times, and evaluated for seed yield and protein concentration. Data were combined within each test across three locations and analyzed using the MIXED procedure of SAS to determine that there were significant genotypic differences among RILs. Composite interval mapping (CIM) detected nine seed yield and ten protein concentration QTL which may be good candidates for MAS as they were environmentally stable. Selections to compare PHE, and MAS for seed yield and protein concentration provided 8 replicated field tests in four relative maturity groups grown in a RCBD replicated three times in three locations in Tennessee, in 2010. We demonstrated that both MAS and PHE may be used to select quantitative traits; however, more studies are required to optimize MAS for quantitative trait improvement.

Download or read book Breeding for Modified Seed Composition in Soybean written by Luciano M. Jaureguy and published by . This book was released on 2012 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of cultivars with modified seed composition represents an excellent alternative to cope with the world's need for more nutritious food. Understanding the genetic and environmental factors controlling crop seed quality traits is of crucial importance for such an endeavor. The objectives of this study were: a) to evaluate the efficiency of phenotype and marker-assisted selection for low stachyose and low phytate soybean breeding lines, and their yield stability, b) to study the effect of management practices planting date and delayed harvest on soybean seed composition, and c) to study the potential association between soil properties and leaf chemical element concentration, with seed composition. Selection efficiency in six breeding populations segregating for the low phytate and low stachyose traits was studied by determining the proportion of phenotypically selected lines that carried the alleles for the low phytate trait or low stachyose traits. Yield stability of low phytate/low stachyose lines was studied in a set of 16 breeding lines selected from a breeding population segregating for the low phytate/low stachyose trait, and grown in five Arkansas environments. Planting date effects on seed composition were studied in nine breeding lines planted in early May, late May, and late June at two Arkansas locations in two consecutive years. Delayed harvest effects on seed composition and the association between soil properties and leaf chemical element concentration, with seed composition were studied in the late May planting date. Results showed that the efficiency of marker-assisted selection depended on the type of marker used, whereas phenotype-assisted selection depended on the germplasm that was being screened and on the phenotype used to make breeding selections. Breeders should use marker-assisted selection for low phytate/low stachyose lines only if phenotyping large number of progenies is not time or cost effective. Most of the low phytate/low stachyose lines showed low yield stability. However, one of the low phytate/low stachyose lines studied, R08-6009, showed competitive yield and adaptation to all the environments where the line was evaluated. R08-6009 should be crossed to high-yield lines to generate progeny with greater yield potential. Other lines studied showed moderately high oleic (>45 mg g-1) and low linolenic (

Download or read book Quantitative Trait Loci for Soybean Seed Yield in Elite and Plant Introduction Germplasm written by Matthew David Smalley and published by . This book was released on 2002 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic improvement for yield in soybean [Glycine max (L.) Merrill] has been accomplished by breeding within a narrow elite gene pool. Plant introductions (PIs) may be useful for obtaining additional increases in yield if unique and desirable alleles at quantitative trait loci (QTL) can be identified. The objectives of the study were to identify QTL for yield in elite and PI germplasm and to determine if the PIs possessed favorable alleles for yield. Allele frequencies were measured with simple sequence repeat (SSR) markers in three populations that differed in their percentage of PI parentage. AP10 had 40 PI parents, AP12 had 40 PI and 40 elite parents, and AP14 had 40 elite parents. Four cycles of recurrent selection for yield had been conducted in the three populations. Nei's genetic distance indicated that AP10, AP12, and AP14 remained distinct through cycle 4 (C4), but that the genetic diversity narrowed within each population. Less gametic phase disequilibrium (GPD) was observed in the parents used to form the cycle 0 (C0) populations than in C4 of AP12 and AP14. Allele frequencies of the highest-yielding C4 lines in the three populations were compared with the parents used to form the populations of the initial cycles. Allele flow was simulated to account for genetic drift. Ninety-two SSRs were associated with 56 yield QTL. Nine of the QTL had been identified in previous research. Thirty-three favorable marker alleles were unique to the PI parents. The restriction of alleles from the 40 C0 parents to the 20 cycle 1 (C1) parents of AP10 was reflected in the number of alleles that had frequency changes and could explain the reduced genetic variance for yield in the C4 of AP10. Genetic asymmetry may account for the different genetic gain for yield that had been observed between AP10 and AP14.

Download or read book The Soybean Genome written by Henry T. Nguyen and published by Springer. This book was released on 2017-09-20 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the application of soybean genome sequences to comparative, structural, and functional genomics. Since the availability of the soybean genome sequence has revolutionized molecular research on this important crop species, the book also describes how the genome sequence has shaped research on transposon biology and applications for gene identification, tilling and positional gene cloning. Further, the book shows how the genome sequence influences research in the areas of genetic mapping, marker development, and genome-wide association mapping for identifying important trait genes and soybean breeding. In closing, the economic and botanical aspects of the soybean are also addressed.

Download or read book Genetic Gain for Seed Yield in Soybean Populations by Recurrent Selection written by Michael Donald Uphoff and published by . This book was released on 1996 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soybeans Improvement Production and Uses written by Billy E. Caldwell and published by . This book was released on 1973 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: