Download or read book Evaluation of Selected Cultivars and F2 Populations of Vegetable type Soybeans Glycine Max L Merrill for Some Major Seed Characteristics written by I. J. Antunes and published by . This book was released on 1978 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Selected Cultivars and F2 Populations of Vegetable type Soybeans Glycine Max L Merrill for Some Major Seed Characteristics written by Iraja Ferreira Antunes and published by . This book was released on 1978 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Soybean Glycine Max L Merrill Lines and Cultivars for Use in Narrow row Culture written by Ghizan Bin Saleh and published by . This book was released on 1983 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomy News written by and published by . This book was released on 1978 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.
Download or read book Recent Progress in Solving Some Farm Problems of Illinois written by University of Illinois at Urbana-Champaign. Agricultural Experiment Station and published by . This book was released on 1976 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Variability for Seed Size and Protein of Two parent and Three parent Soybean Populations written by Brian Joseph Alt and published by . This book was released on 2002 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean [Glycine max (L.) Merr.] cultivars with large seed size and high protein content are desirable for the production of tofu and other food products. The objectives of this study were to evaluate the amount of genetic variability and the effectiveness of single plant selection for seed size and protein in two- and three-parent soybean populations. Two parents with large seed and high protein (LSHP) and one parent with normal seed size and protein (N) were used to produce three population types: LSHP x N, LSHP x LSHP, and LSHP x (LSHP x N). Four sets of the three population types were evaluated with different parents in each set. For each of the populations, 100 random F2 plants and 10 plants of each parent were harvested at Ames, IA, and their seed size and protein measured. The F3 progeny of the 100 F2 plants and 10 entries of the three parents of each set were evaluated in replicated tests at two Iowa locations. The percentage of F[Subscript 2:3] lines with seed size equal to the smallest LSHP parent and protein equal to the lowest LSHP parent in the set averaged 4% for the LSHP x N, 88% for the LSHP x LSHP, and 3l% for the three-parent crosses. Single-plant selection was not considered cost effective in the LSHP x N populations because the percentage of acceptable segregates was so small or in the LSHP x LSHP populations because the percentage of acceptable segregates was so high. For the three-parent populations, single-plant selection was most effective when the F2 plants were ranked for the two traits and those with the most favorable rank were selected for evaluation as F[Subscript 2:3] lines. LSHP x LSHP and three-parent populations should be the most useful for developing LSHP cultivars.
Download or read book Identification of Soybean Glycine Max L Merrill Cultivars Using Rapid Laboratory Techniques written by C. K. Wagner and published by . This book was released on 1981 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variation in Seed Quality Characters in Soybean Glycine Max L Merrill Cultivars written by B. R. K. Reddy and published by . This book was released on 1999 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of Quality Traits for Food grade Soybean Glycine Max L Merr in a Breeding Population written by Mao Huang and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Food-grade soybeans are a specialty crop with unique chemical and physical seed quality requirements. The tofu production market requires large, round soybean seed with a clear hilum and high protein content. The aim of this project was to detect QTL responsible for traits important in food-grade soybeans, and to provide information for the selection of food-grade soybeans in a breeding program. This study assessed seed shape, size, density, weight, protein content, and oil content in two independent populations of breeding lines and cultivars as well as textural traits of the tofu produced from a subset of those. By identifying the relationship between seed traits and tofu texture, the previously established positive correlation between seed protein content and the stiffness and gel strength of tofu were confirmed. Little to no correlations between seed size and shape measurements and the texture of tofu were detected, indicating that this consumer preference for large, round seeds may not relate to tofu quality. The effects of selection for specialty traits on the genetic differentiation within a breeding program were assessed, results shown that both parental and progeny selection contributed to genetic differentiation and population structure. Association mapping was conducted with 504 markers in a population of 242 breeding lines and cultivars, leading to the identification of 50 significant marker-trait associations. Of the 27 significant associations tested in another independent confirmation population consisting of 152 lines or cultivars, 12 were confirmed. These results can be directly applied to increase selection efficiency in a breeding program.
Download or read book Plant Breeding Abstracts written by and published by . This book was released on 1991 with total page 1878 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Variability for Seed Size of Two parent and Three parent Soybean Populations written by Susan Laura Johnson and published by . This book was released on 2000 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specialty soybean [Glycine max (L.) Merr.] cultivars with [Less than or equal to] 80 mg seed−1 are used to produce grain for export to Japan for the production of natto, a fermented food. The purpose of the study was to compare three population types for the recovery of lines that would have adequately small seed size for natto. Two small-seeded and one normal-size conventional cultivar or line were used to produce a small-seeded x small-seeded two-parent population, a small-seeded x normal-size two-parent population, and a small-seeded x (small-seeded x normal-size) three-parent population. Five sets of the three population types were developed with different parents in each set. The seed size of 100 random F2 plants from each of the 15 populations and 1O plants of each parent was determined. For each of the five sets, the progeny of the 100 F2 plants of each population type were compared as F2-derived lines with 10 entries of each of the three parents at two Iowa locations. The average percentage of lines with a seed size equal to or smaller than one of the parents in a cross was 90% for the small-seeded x small-seeded populations, 4% for the small-seeded x normal-size populations, and 20% for the three-parent populations. An average of 10% of the lines from the small-seeded x small-seeded populations had significantly smaller seed size than either of the parents, and no transgressive segregation for small seed size was observed in the other two population types. For the development of small-seeded cultivars, small-seeded x small-seeded and three-parent populations would provide lines with acceptable seed size. A small-seeded x normal-size population may provide suitable lines if seed size of the conventional cultivar is sufficiently small and adequate resources are available to select for the limited number of small-seeded segregates.
Download or read book The Effect of Seed Size on the Morphological and Agronomic Characteristics of Soybean Cultivars Glycine Max L Merrill written by Nasser Latifi and published by . This book was released on 1977 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recurrent Selection for Increased Seed Yield in Two Soybean Populations with Distinct Genetic Backgrounds written by Luis Posadas and published by . This book was released on 2013 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean is the second major world oil seed and the leading source of high quality vegetable protein. Recurrent selection (RS) is a cyclic breeding method that improves population performance for quantitative traits. The UP2Y population was developed from seven unimproved plant introductions (PIs) selected on their high seed protein concentration and diverse geographical origin. The UP3Y population was developed from eight elite cultivars and experimental lines adapted to North America with diverse pedigrees selected on their high grain yield and above-average seed protein concentration. The objective of this study was to evaluate effects of RS for increased grain yield on major agronomic traits of the soybean UP2Y and UP3Y populations. Response to selection was measured by evaluating the 10 highest-yielding lines selected at the end of each cycle. The seven founders of the UP2Y and seven of the eight founders of the UP3Y populations were evaluated along with 10 parental lines of each of three (Cycle 1, Cycle 2 and Cycle 3) and two (Cycle 1 and Cycle 3) cycles of the UP2Y and UP3Y populations, respectively, in randomized complete block designs across eight environments with three replications. After three cycles of RS in the UP2Y population, grain yield increased significantly from a mean of 3070 kg ha-1 for Cycle 0 (C0) to a mean of 5037 kg ha-1 for Cycle 3 (C3), averaging a significant gain of 673 kg ha-1 cycle-1. Seed protein concentration decreased an average of 16 g kg-1 cycle-1. Seed oil concentration increased an average of 8.7 g kg-1 cycle -1. Results of the UP3Y evaluation showed that after three cycles of RS grain yield increased significantly from a mean of 4200 kg ha-1 for C0 to a mean of 4499 kg ha-1 for C3, averaging a significant gain of 101 kg ha-1 cycle-1. Seed protein concentration decreased an average of 2.8 g kg-1 cycle-1 while seed oil concentration increased an average of 0.8 g kg-1 cycle -1.
Download or read book Performance Testing for Seed Yield and Quality Attributes in Selected Cultivars of Soybean Glycine Ma L Merrill written by Rajashekhar and published by . This book was released on 2020 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation and Genetic Analysis of Two Soybean Glycine Max L Merr Recombinant Inbred Line Populations Segregating for Resistance to Root Knot Nematode Meloidogyne Incognita written by Drew Wright and published by . This book was released on 2012 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most economically important pathogens of US soybeans is the Southern Root Knot Nematode [(Meloidogyne incognita ) (Kofoid and White) Chitwood] (Mi). Evaluation and identification of resistance is highly important to the plant breeding program at SIUC. The main objective of this study was to screen within the greenhouse two F5:7 recombinant inbred line (RIL) (n =96) from crosses between LS90-1920 or LS97-1610 (resistant parents) with 'Spencer' (susceptible parent) to identify sources of resistance for Mi. Additionally, the RILs were evaluated in two locations in southern Illinois (Harrisburg and Dowell) in 2011 for several agronomic characteristics including yield performance. The phenotypic data collected from field and greenhouse experiments was used to select for superior lines within the two populations. The screening data was also used to identify single nucleotide polymorphism (SNP) markers associated with Mi resistance. Initial screening of the 5,361 SNP markers indicated four SNP markers (ss247062763, ss247064854, ss247077423 and ss247067293) highly associated with resistance to Mi. The results will help accelerating selection practices, and have provided high yielding resistant lines for the creation of resistant commercial varieties.
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 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.
