Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network

Open Access. Powered by Scholars. Published by Universities.®

PDF

Iowa State University

Plant Sciences

Soybean Genetics Newsletter

1986

Articles 1 - 30 of 47

Full-Text Articles in Entire DC Network

Research Notes : India : Heritability Estimates For Seed Quality Traits In Soybean, V. D. Verma, H. H. Ram Apr 1986

Research Notes : India : Heritability Estimates For Seed Quality Traits In Soybean, V. D. Verma, H. H. Ram

Soybean Genetics Newsletter

Breeding programs with primary emphasis on yield and resistance to dis-eases are in progress at this center since 1967-68. Rapid strides have since been made in this direction with breeding and release of several high-yield-ing soybean varieties, viz: Ankur, Alankar, Shilajeet, PK-262, PK-327, PK-308, and PK-416. However, still a constraint to expansion of soybean cultivation in tropics seems to be deterioration of seed quality in storage.


Usda Northern Soybean Germplasm Collection Report, Soybean Genetics Newsletter Apr 1986

Usda Northern Soybean Germplasm Collection Report, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : United States : Screening For Cytoplasmic/Maternal Effects In Resistance To Soybean Cyst Nematode, A. P. Rao, S. C. Anand Apr 1986

Research Notes : United States : Screening For Cytoplasmic/Maternal Effects In Resistance To Soybean Cyst Nematode, A. P. Rao, S. C. Anand

Soybean Genetics Newsletter

With the discovery of soybean cyst nematode (SCN) in the U.S. in 1954, the research for resistance was initiated. Ross and Brim (1957) identified several soybean plant introductions resistant to the North Carolina SCN populations. Epps and Hartwig (1972) reported PI lines resistant to race 4.


Research Notes : Taiwan : A Spontaneous Narrow-Leaflet Mutant, S. Shanmugasundaram, Kun-Te Lee, Erika Wu, Li Fen Li Chen Apr 1986

Research Notes : Taiwan : A Spontaneous Narrow-Leaflet Mutant, S. Shanmugasundaram, Kun-Te Lee, Erika Wu, Li Fen Li Chen

Soybean Genetics Newsletter

At the Asian Vegetable Research and Development Center, developing improved vegetable soybeans is one of the objectives. In accomplishing that objective, one of the crosses involved AGS 188, PI 157424 from Maturity Group IV and G 10381, cultivar 'Kaohsiung' No. 8 released by the Kaohsiung District Agricultural Improvement Station in Pingtung, Taiwan. The F1 and F2 progenies of the cross were normal.


Research Notes : India : Genetic Variability, Interrelationships And Path-Coefficient Analysis Of Seed Technological Traits In Soybean Under Different Cropping Systems, H. Mehta, S. K. Sharma, N. D. Rana Apr 1986

Research Notes : India : Genetic Variability, Interrelationships And Path-Coefficient Analysis Of Seed Technological Traits In Soybean Under Different Cropping Systems, H. Mehta, S. K. Sharma, N. D. Rana

Soybean Genetics Newsletter

Soybean is generally cultivated in India as a sole or monoculture crop. However, its intercropping with maize is a common practice in some hilly areas of northern India. The practice aims at (1) insuring against total crop fail-ures under abnormal weather conditions, (2) increasing total productivity for unit land area, and (3) equitable and judicious utilization of land resources and farming inputs.


Index Of Authors, Soybean Genetics Newsletter Apr 1986

Index Of Authors, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : India : Recent Advances In Mutation-Breeding Research In Soybean In India, Violet Kerketta, Md. Fazlul Haque Apr 1986

Research Notes : India : Recent Advances In Mutation-Breeding Research In Soybean In India, Violet Kerketta, Md. Fazlul Haque

Soybean Genetics Newsletter

In spite of high yielding ability of Birsa Soybean-1 for the plateau re-gion of Bihar, it has not become popular among the farmers because of its black seed-coat color. The seeds of Birsa Soybean-1 were irradiated with different doses of gamma rays at FCI Sindri, Bihar (India) in 1979. Proge-nies of a yellow-seeded 50 Kr. M-2 plant in M-3 gave very promising and inter-esting plant types (Prakash et al., 1984).


Research Notes : Pakistan : Path-Coefficient Analysis Of Developmental And Yield Components In Soybean, M. A. Rajput, G. Sarwar, K. H. Tahir Apr 1986

Research Notes : Pakistan : Path-Coefficient Analysis Of Developmental And Yield Components In Soybean, M. A. Rajput, G. Sarwar, K. H. Tahir

Soybean Genetics Newsletter

Abstract: Interrelationships among different characters were determined by simple correlations and path-coefficient analysis using 36 diverse and elite cultivars representing different geographical origin. The results revealed a highly significant positive association of the branches per plant and pods per plant with grain yield. The pods per plant also showed a high direct influence on grain yield. Thus, from this investigation, it is suggested that pods per plant and number of branches per plant are the primary yield components that should be given due emphasis in selecting high yielding genotypes in soybean.


Research Notes : United States : Genes For Resistance To Phytophthora Megasperma F. Sp. Glycinea In Pi 273483d, Pi 64747, Pi 274212, Pi 82312n, And Pi 340046, Kirk L. Athow, Francis A. Laviolette, Alice C. Layton Hahn, L. Daniel Ploper Apr 1986

Research Notes : United States : Genes For Resistance To Phytophthora Megasperma F. Sp. Glycinea In Pi 273483d, Pi 64747, Pi 274212, Pi 82312n, And Pi 340046, Kirk L. Athow, Francis A. Laviolette, Alice C. Layton Hahn, L. Daniel Ploper

Soybean Genetics Newsletter

Several years ago, we identified seven plant introductions resistant to the 16 races of Phytophthora megasperma f. sp. glycinea Kuan and Erwin (Pmg) known at that time. Each of these was crossed to the eight cultivars in Table 1 to determine how resistance was controlled. They were not crossed to cultivars that contained Rps2 or Rps5 because Rps2 was found using root inoculation in a liquid culture solution, and Rps5 was described after this study was started.


Research Notes : United States : Enhancing Seed Set In Glycine Falcata, H. E. Heer Apr 1986

Research Notes : United States : Enhancing Seed Set In Glycine Falcata, H. E. Heer

Soybean Genetics Newsletter

Research using wild relatives of the soybean, such as Glycine falcata Benth., a native of Australia, has been hampered by an extremely low seed set under greenhouse conditions in the absence of pollinating vectors. A quick and efficient method of enhancing seed set in this species was developed in working with Neonotonia verdcourtii, a species from Africa formerly included in the genus Glycine (Isely et al., 1980). Conventional soybean crossing techniques among flowers of one plant were tedious and time-consuming, and did not produce many seeds.


Mailing List, Soybean Genetics Newsletter Apr 1986

Mailing List, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : China : Comparison Of Inheritance Of Several Agronomic Characters Between Glycine Max X G. Soja, G. Max X G. Gracillis, And G. Max X G. Max, Wangin Lee, Jinling Wang Apr 1986

Research Notes : China : Comparison Of Inheritance Of Several Agronomic Characters Between Glycine Max X G. Soja, G. Max X G. Gracillis, And G. Max X G. Max, Wangin Lee, Jinling Wang

Soybean Genetics Newsletter

In 1984, parents, F1, F2, and F3 populations of three crosses of Glycine max x G. soja, G. max x G. gracilis and G. max x G. max had been planted simultaneously for comparison of the inheritance of several agronomic charac-ters of the above three different soybean crossing combinations. Performance of lines or cultivars of different species used as parents can be shown in Table 1. These results reveal that: The sequence of magnitude of variation of the agronomic characters of F3 population is: G. max x G. soja > G. max x G. gracilis > G. max x G. max.


Research Notes : United States : Inheritance Of Metribuzin Sensitivity In The Soybean Cultivar 'Altona', P. M. Hanson, C. D. Nickell Apr 1986

Research Notes : United States : Inheritance Of Metribuzin Sensitivity In The Soybean Cultivar 'Altona', P. M. Hanson, C. D. Nickell

Soybean Genetics Newsletter

Metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one] is an herbicide that can be effective in controlling many broadleaf weeds in soybeans. However, some soybean cultivars are sensitive to metribuzin and can suffer considerable damage (Wax et al., 1976). Previous research has established that a single recessive gene, hm, conditions the sensitive reaction of 'Semmes' (Edwards et al., 1976) and 'Tracy' (Kilen and Barrentine, 1983) to b metribuzin.


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward : Harvest Index, A. Bhagsari Apr 1986

Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward : Harvest Index, A. Bhagsari

Soybean Genetics Newsletter

Simultaneous investigations were conducted at experiment farms at Fort Valley State College and Maryland Eastern Shore in 1985 with 42 soybean genotypes (14 each from MG III, IV, and V) to determine seed yield efficiency (SYE) and grain yield and their relationship to other agronomic traits. The mean seed yield efficiency ranged from 34 to 51, 35 to 50, and 28 to 59% for MG III, IV, and V, respectively. The mean grain yield for three MGs was similar and ranged from 19.65 (MG III) to 22.86 (MG V) quintals/ha.


Research Notes : United States : Measured And Predicted Yield Response Of Soybeans To Simulated Acid Rain, F. L. Allen, H. L. Bhardwaj Apr 1986

Research Notes : United States : Measured And Predicted Yield Response Of Soybeans To Simulated Acid Rain, F. L. Allen, H. L. Bhardwaj

Soybean Genetics Newsletter

Modern soybean cultivars in the U.S. are highly related within the northern and within the southern maturity groups and they trace their genetic constitution to a small number of ancestral lines. On the other hand, there is much less genetic relationship between northern cultivars and southern cultivars. Examples of this can be seen in Figure 1, which shows the ancestral relationships among selected lines and cultivars developed from the northern and southern germplasm pools, respectively.


Research Notes : United States : A New Mutation At The Ms1 Locus, H. Skorupska, Reid G. Palmer Apr 1986

Research Notes : United States : A New Mutation At The Ms1 Locus, H. Skorupska, Reid G. Palmer

Soybean Genetics Newsletter

Five different populations have been recognized as sources of ms1 alleles. Genetic studies of male-sterile, female-fertile mutations conducted by Palmer et al. (1978) showed that ms1-North Carolina (T260), ms1-Urbana (T266), ms1-Tonica (T267), and ms1-Ames (T268) are independent mutations at the ms1 locus. Yee and Jian (1983) reported another mutation at the ms1 locus, designated Shennong Male-Sterile Soybean L-78-387.


Research Notes : Poland : Interdependences Between Some Traits In Early Hybrid Genera-Tions (F2-F4) Of Soybean, Grzegorz Konieczny Apr 1986

Research Notes : Poland : Interdependences Between Some Traits In Early Hybrid Genera-Tions (F2-F4) Of Soybean, Grzegorz Konieczny

Soybean Genetics Newsletter

The existence of an interdependence between some important traits of soy-bean is of great significance for its breeding. In rather cool climate (Poland) interdependences between developmental traits and yield structure elements affect the possibility of fast creation and introduction of new, well-adapted and efficient cultivars into agricul-tural practice. Estimation of phenotypic correlations of 11 traits was the subject of this paper.


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward : Moisture Stress, B. Kpoghomou, V. T. Sapra Apr 1986

Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward : Moisture Stress, B. Kpoghomou, V. T. Sapra

Soybean Genetics Newsletter

Seventeen soybean genotypes were screened in a laboratory and growth-chamber experiment for water-stress tolerance characteristics. Three osmotic concentrations (0, -0.3 and -0.5 MPa) were used in an 8-day germination test conducted in the laboratory at Alabama A&M University. The Promptness Index (PI) and Germination Stress Index (GSI) were calculated (Bouslama and Schapaugh, 1984).


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward : Soil Acidity, S. C. Tewari, P. W. Igbokwe Apr 1986

Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward : Soil Acidity, S. C. Tewari, P. W. Igbokwe

Soybean Genetics Newsletter

Three years of field trials (1981-83) with six cultivars of soybeans ('Bed-ford', 'Bragg', 'Braxton', C-237, 'Forrest', and 'Tracy M') conducted on the Memphis silt loam soil showed greater resistance to low pH (5.0-5.5) for Forrest and Bedford as compared to the other cultivars. However, at pHs lower than 5.0, seed formation of all the cultivars was adversely affected, espe-cially under moisture stresses. Greenhouse and laboratory studies during the same time period indicated higher P absorption for Forrest and Bedford at pH 5.0 to 5.5


Research Notes : Vietnam : Exotic Soybean Yield Performance Trial In The Mekong Delta In Sr Vietnam, Huu Tin Chu Apr 1986

Research Notes : Vietnam : Exotic Soybean Yield Performance Trial In The Mekong Delta In Sr Vietnam, Huu Tin Chu

Soybean Genetics Newsletter

The test was conducted on a brown, silty, clay loam. The soil was quite acid for soybeans, but it is fairly representative of the soil types in the area. With a pH of 5.1, there was an adequate amount of available calcium; however, the availability of N, P, and K was quite low.


Research Notes : United States : Allelism Tests Of T218h And T225h, Peggy M. Hatfield, Reid G. Palmer Apr 1986

Research Notes : United States : Allelism Tests Of T218h And T225h, Peggy M. Hatfield, Reid G. Palmer

Soybean Genetics Newsletter

Genetic type T218M was found in 'Illini' in 1952 at Urbana, IL. T218H was derived from T218M by crossing a yellow branch as male parent with Illini. The F1 plants were green. Segregation in the F2 gave 3 green: 1 yellow lethal plants. F2 green plants gave ratios of 1 nonsegregating: 2 segregating prog-enies in the F3 generation, confirming monogenic inheritance (Palmer, 1978, unpublished). The recessive allele is carried as the heterozygote in T218H.


Research Notes : United States : Genetics Of Reaction To Soybean Mosaic Virus (Smv) In The Cultivars 'Kawnggyo', 'Marshall', And Pi 96983, Curtis W. Roane, Sue A. Tolin, Glenn R. Buss Apr 1986

Research Notes : United States : Genetics Of Reaction To Soybean Mosaic Virus (Smv) In The Cultivars 'Kawnggyo', 'Marshall', And Pi 96983, Curtis W. Roane, Sue A. Tolin, Glenn R. Buss

Soybean Genetics Newsletter

Several genes conditioning resistance to SMV have been found and some have been assigned gene symbols. In addition, a series of SMV strain groups has been differentiated by their interactions with a selected group of culti-vars (Cho and Goodman, 1979; Lim, 1985). We have undertaken a study of the genes conditioning the reactions of certain differential cultivars to SMV in an attempt to establish their relationships with symbolized genes.


Usda Southern Soybean Germplasm Collection Report, Soybean Genetics Newsletter Apr 1986

Usda Southern Soybean Germplasm Collection Report, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : U.S.S.R. : Characteristics Of Soybean Mutants Induced By Chemical Mutagens 186 And Gamma-Rays, V. I. Sichkar Apr 1986

Research Notes : U.S.S.R. : Characteristics Of Soybean Mutants Induced By Chemical Mutagens 186 And Gamma-Rays, V. I. Sichkar

Soybean Genetics Newsletter

Four varieties of soybean were developed in our country by using experimental mutations. Mutant varieties 'Universal' and 'Beregovchanka' were developed by direct selection of changed plants after mutagen treatment. 'Rannaya 10' and 'Volna' were created by combining hybridization and mutagenesis.


Research Notes : Zambia : Seed Inoculation Response For Promiscuous Soybean Cultivars, J. M. Joshi, S. Nkumbula, F. Javaheri Apr 1986

Research Notes : Zambia : Seed Inoculation Response For Promiscuous Soybean Cultivars, J. M. Joshi, S. Nkumbula, F. Javaheri

Soybean Genetics Newsletter

A major constraint in increasing soybean production in the developing countries is the availability of inoculum to small scale farmers in the remote areas of the country. This group of farmers also lack adequate storage facilities for the inoculum. This problem is being overcome by developing pro-miscuous soybean varieties in Zambia (Javaheri and Nyemba, 1982; Joshi et al., 1985) and at the International Institute of Tropical Agriculture, Ibadan, Nigeria (Kueneman et al., 1984).


Research Notes : United States : A Greenhouse Method Of Screening Soybeans For Resistance To Fusarium Wilt, Christopher Tinius, T. A. Davoli, R. D. Berger, Kuell Hinson Apr 1986

Research Notes : United States : A Greenhouse Method Of Screening Soybeans For Resistance To Fusarium Wilt, Christopher Tinius, T. A. Davoli, R. D. Berger, Kuell Hinson

Soybean Genetics Newsletter

Fusarium wilt of soybean (causal organism: Fusarium oxysporum Schlecht. emend. Snyd. & Hans.) has become an increasingly severe disease in the breed-ing plots at Gainesville and may be an undiagnosed or misdiagnosed problem in soybean production fields. At Gainesville, severity of Fusarium wilt, or a complex which includes F. oxysporum, has reduced yields in some plots to near-ly zero.


Research Notes : India : Response Of Soybean (Glycine Max (L.) Merrill) To Foliar Application Of Some Growth Regulators And In Combination With Urea And Potash, S. C. Sarmah, S. C. Dey Apr 1986

Research Notes : India : Response Of Soybean (Glycine Max (L.) Merrill) To Foliar Application Of Some Growth Regulators And In Combination With Urea And Potash, S. C. Sarmah, S. C. Dey

Soybean Genetics Newsletter

Introduction: The concept of foliar nutrition and its relationship with yield is not new. Nutrients, especially the micronutrients when applied as foliar spray, exert pronounced influence on plant growth and yield. Such micronutrients are in use for improving the growth and yield of crops.


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward : Micronutrients, M. R. Reddy Apr 1986

Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward : Micronutrients, M. R. Reddy

Soybean Genetics Newsletter

A greenhouse experiment was conducted to evaluate the response of different soybean genotypes to manganese application. Twenty-five soybean genotypes belonging to different maturity groups were grown in a greenhouse using a Lynch-burg sandy loam soil collected from Sampson County, NC. It is a coastal plain soil deficient in manganese. Manganese rates were 0, 15, and 30 kg per hec-tare. The experimental design was a split plot with three replications.


Recent Soybean Genetics And Breeding Publications, Soybean Genetics Newsletter Apr 1986

Recent Soybean Genetics And Breeding Publications, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : India : Effect Of Mulching On Seedling Emergence And Yield Of Soybean, S. C. Sarmah Apr 1986

Research Notes : India : Effect Of Mulching On Seedling Emergence And Yield Of Soybean, S. C. Sarmah

Soybean Genetics Newsletter

Abstract : Experiment carried out with different materials for two years revealed the beneficial effects of mulching on seedling emergence as well as yield. The average increase in seedling emergence over control (no mulching) was 97.3, 53.1, 35.7, and 28.6% in plots mulched with paddy straw, wheat straw, paddy husk, and wheat husk, respectively. Mulching with paddy straw and wheat straw resulted in 55.5% and 44.1% increase in grain yield, respectively, over no mulching. The reasons for the beneficial effects of mulch in seedling emergence and increase in grain yield is discussed.