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Iowa State University

Plant Sciences

Soybean Genetics Newsletter

1984

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Research Notes : United States : Evaluation Of Glycine Soja From The People's Republic Of China And The Ussr, R. G. Palmer, K. E. Newhouse Apr 1984

Research Notes : United States : Evaluation Of Glycine Soja From The People's Republic Of China And The Ussr, R. G. Palmer, K. E. Newhouse

Soybean Genetics Newsletter

A chromosome interchange was suspected by Williams (1948) in a cross involving Glycine soja Sieb. and Zucc. PI 101404B. This interchange was confirmed by Palmer and Heer (n.d.). The objective of the present study was to search for chromosome inter-changes among G. soja accessions from The People's Republic of China and the USSR.


Research Notes : United States : Superoxide Dismutase (Sod) In Soybean, J. D. Griffin, R. G. Palmer Apr 1984

Research Notes : United States : Superoxide Dismutase (Sod) In Soybean, J. D. Griffin, R. G. Palmer

Soybean Genetics Newsletter

We are using vertical polyacrylamide gel electrophoresis (Davis, 1964) and a staining system modified after Beauchamp and Fridovich (1971) to study superoxide dismutase polymorphisms in the subgenus soja. This staining system generates superoxide radical; hence, it is specific for SOD activity. We re-solve up to 9 SOD bands in dry or germinating soybean cotyledons, and in leaves.


Research Notes : United States : A Possible Interaction Between Cyt-Y3 And Y20-K2, R. C. Shoemaker, R. G. Palmer Apr 1984

Research Notes : United States : A Possible Interaction Between Cyt-Y3 And Y20-K2, R. C. Shoemaker, R. G. Palmer

Soybean Genetics Newsletter

Interactions of organelle genomes are a well-documented fact. Interac-tion can take the form of metabolite and energy exchange, co-production of enzyme subunits, and co-production of membrane structural and organizational components (Wallace, 1982). Nucleo-cytoplasmic interaction also has been documented for various traits affecting vegetative and harvest indices (Rob-ertson and Frey, 1984), cytoplasmic male sterility (Levings, 1983), and other agronomic characters (Harvey et al., 1972; Kihara, 1982).


Announcements, Soybean Genetics Newsletter Apr 1984

Announcements, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : United States : In Vitro Fertilization Of Perennial Soybean Species, John J. Silvoy, Earlene A. Rupert, Emerson R. Shipe Apr 1984

Research Notes : United States : In Vitro Fertilization Of Perennial Soybean Species, John J. Silvoy, Earlene A. Rupert, Emerson R. Shipe

Soybean Genetics Newsletter

Interspecific hybridization in the genus Glycine is difficult and few successes have resulted from a multitude of attempts (Newell and Hymowitz, 1982, 1983). Because flowers of the perennial species are especially difficult to manipulate in the field or greenhouse, a study was undertaken to examine the potential of fertilizing these species in vitro, thereby partially alleviating mechanical damage to the ovulary and environmental stress. Initial studies were intended to develop in vitro procedures under which ovularies would survive and form viable embryos. Therefore, all flowers were self-fertilized.


Special Reports : Germplasm Collection Report, Soybean Genetics Newsletter Apr 1984

Special Reports : Germplasm Collection Report, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Special Reports : Soybean Germplasm Advisory Committee, Soybean Genetics Newsletter Apr 1984

Special Reports : Soybean Germplasm Advisory Committee, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : India : Effect Of Varieties And Date Of Sowing On The Growth And Yield Of Soybean, S. C. Sarmah, A. K. Choudhury Apr 1984

Research Notes : India : Effect Of Varieties And Date Of Sowing On The Growth And Yield Of Soybean, S. C. Sarmah, A. K. Choudhury

Soybean Genetics Newsletter

The recognition of highly valued soybean in India is well understood by its cultivation of 6 lakhs hectares during 1980-81 (Bhatnagar, 1980-81). Though Assam is famous as a rice growing area, the typical uplands are not properly utilized for rice because of partial to nonavailability of irrigation water. These areas are either partly used for raising rice seedlings or put to summer vegetables.


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency : To Evaluate Soybean Germplasm For Biological Efficiency In - Nitrogen Fixation, V. T. Sapra, M. Floyd, R. Garner, S. Mookherji Apr 1984

Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency : To Evaluate Soybean Germplasm For Biological Efficiency In - Nitrogen Fixation, V. T. Sapra, M. Floyd, R. Garner, S. Mookherji

Soybean Genetics Newsletter

Twenty commercial soybean cultivars from maturity groups IV through VIII were screened for nitrogen-fixation in a growth chamber using Rhizobium strains 3IlB 6,122 and combination of 6 and 122. The data on nodule number, nodule weight, shoot fresh weight, shoot dry weight, and acetylene reduction were recorded. Among twenty cultivars, 'Lee 74' (MG IV), 'Bay' (MG V), and 'Essex' (MG V) were identified as high N-fixers, based on more nodules and high acetylene reduction.


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward - Soil Acidity, C. C. Tiwari, P. E. Igbokwe, S. Edung, L. Russel Apr 1984

Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward - Soil Acidity, C. C. Tiwari, P. E. Igbokwe, S. Edung, L. Russel

Soybean Genetics Newsletter

Field experiments conducted on a silt loam soil with six culti-vars under four pH ranges (5.9-6.7, 5.7-6.5, 5.3-6.0 and 5.0-5.6) in-dicated significant tolerance of 'Bedford' and 'Forrest' under acid soil pH ranges. The two cultivars were superior to 'Bragg', 'Braxton', 'Co-237', and 'Tracy M' in 1981 and 1982 trials. However, lowering of pH to 4.6-5.4, 4.5-5.4, 4.1-5.1, and 3.8-4.5 resulted in nullified seed formation in all the cultivars.


Research Notes : Japan : Effect Of Temperature On Fasciation Characters In Fasciated Soybean, W. Wongyai, T. Furuya, S. Matsumoto Apr 1984

Research Notes : Japan : Effect Of Temperature On Fasciation Characters In Fasciated Soybean, W. Wongyai, T. Furuya, S. Matsumoto

Soybean Genetics Newsletter

The phenomenon of fasciation in soybean as a consequence of spontaneous mutation has been known for a long time under the name of 'Keito-marne' or 'Shakujo-rnarne'. Fasciated soybean has a peculiar character in which the stern is flattened, with a few number of branches. The flowers develop as a cluster at the top of the stem and most pods accumulate at that part (Takahashi and Fukuyama, 1919; Takagi, 1929). It has been reported that stem fasciation is controlled by a single recessive gene, f (Takagi, 1929).


Research Notes : United States : The Genus Glycine Subgenus Glycine Germplasm Collection, T. Hymowitz Apr 1984

Research Notes : United States : The Genus Glycine Subgenus Glycine Germplasm Collection, T. Hymowitz

Soybean Genetics Newsletter

The genus Glycine as currently delimited is divided into two subgenera Glycine and Soja. The subgenus Soja includes the soybean, G. max, and its annual wild counterpart, G. soja. The subgenus Glycine comprises seven wild perennial species.


Research Notes : United States : Mechanical Separation Of Seed From Male-Sterile And Fertile Plants By Seed Size, T. E. Carter Jr., J. W. Burton, E. B. Huie,Jr. Apr 1984

Research Notes : United States : Mechanical Separation Of Seed From Male-Sterile And Fertile Plants By Seed Size, T. E. Carter Jr., J. W. Burton, E. B. Huie,Jr.

Soybean Genetics Newsletter

In soybeans, there are at least four recessive genes (ms1, ms2, ms3, ms4) that impart unconditional male sterility. A plant homozygous for any of these genes sets seed almost exclusively as a result of pollen transfer from male-fertile plants. A consequence of male sterility is that seed from sterile plants tends to be larger than those from fertile plants (Burton et al., 1979; Carter et al., 1983).


Research Notes : Vietnam : Contributory Applied Research In Growing Soybean In The Mekong 169 Delta -Socialist Republic Of Vietnam, Huu Tin Chu Apr 1984

Research Notes : Vietnam : Contributory Applied Research In Growing Soybean In The Mekong 169 Delta -Socialist Republic Of Vietnam, Huu Tin Chu

Soybean Genetics Newsletter

During the period from 1976 through 1982, several experiments were car-ried out by the Soybean Research Center, University of Cantho, Socialist Republic of Vietnam to find out the most suitable varieties and the best cultural practices in the area. Among these experiments were the following: varietal selection and evaluation, interaction of agronomical physiological characteristics and tendency to boost seed yield in soybean, fertilization, seeding rate, row spacing, number of plants per hill, water requirements, and so on. This communication is focused only on a collection of up-to-date experimental data available.


Research Notes : United States : Hybridization In Genus Glycine Subgenus Glycine, R. J. Singh, T. Hymowitz Apr 1984

Research Notes : United States : Hybridization In Genus Glycine Subgenus Glycine, R. J. Singh, T. Hymowitz

Soybean Genetics Newsletter

Since the publication of Newell and Hymowitz (1983), we have obtained a considerable number of new intra-and interspecific hybrids in subgenus Glycine. Parents in the hybridization programs were selected based upon their differences in morphology, chromosome number, and the area of origin. These hybrids shown below are being studied cytogenetically.


Research Notes : U.S.S.R : Some Characteristics Of Lectins In Soybean Seeds, E. L. Golinskaya, I. V. Chernaja, V. F. Marjushkin, V. I. Sichkar Apr 1984

Research Notes : U.S.S.R : Some Characteristics Of Lectins In Soybean Seeds, E. L. Golinskaya, I. V. Chernaja, V. F. Marjushkin, V. I. Sichkar

Soybean Genetics Newsletter

Natural complex of proteins, fats, carbohydrates, mineral salts and vita-mins in legume seeds makes them nonsubstituted in establishment of stable feed-ing base for livestock. In human diet use of legumes is increasing, too. But some seed substances reduce nutritive and feeding qualities of legumes very much.


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward - Pest And Diseases, M. Rangappa, P. S. Benepal Apr 1984

Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward - Pest And Diseases, M. Rangappa, P. S. Benepal

Soybean Genetics Newsletter

A total of 1,273 soybean germplasm lines and 39 commercial varie-ties were screened for natural resistance to Mexican bean beetle (MBB) under field conditions. There were 421, 314, 266, 136, and 136 germplasm and varieties from maturity groups VI, VII, VIII, IX, and X, respectively. An average of 1,000 laboratory-reared adult MBB per day were released uniformly over all the field throughout the growing season from May until September to create an adequate MBB infestation.


Special Reports : Rhizobium Japonicum Strains Maintained In Culture Collections Throughout The World, Soybean Genetics Newsletter Apr 1984

Special Reports : Rhizobium Japonicum Strains Maintained In Culture Collections Throughout The World, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : India : Effects Of Sowing Date And Decapitation On Green Soybeans, S. C. Sarmah, A. K. Choudhury Apr 1984

Research Notes : India : Effects Of Sowing Date And Decapitation On Green Soybeans, S. C. Sarmah, A. K. Choudhury

Soybean Genetics Newsletter

Green soybean as fresh vegetable is gaining popularity in many of the soybean-producing countries of the world. Soybean as vegetable can be grown easily during rainy season because final product is harvested as immature green seed (Shanmugasundaram et al., 1982). Decapitating at 4-5 trifoliolate leaves has been found to increase the yield by 14 to 22% (Tin, 1982).


Research Notes : United States : Genetic Studies With T263, R. G. Palmer Apr 1984

Research Notes : United States : Genetic Studies With T263, R. G. Palmer

Soybean Genetics Newsletter

We reported inheritance studies and linkage tests with T263 (Palmer, 1977), a line carrying a gene for dwarfness. We had not completed allelism tests with the other available dwarfs, df2, df3, and df4, at that time. In this report, we give the allelism test results, as well as results of linkage tests of T263 with y13, Y12, G, T, and a chromosome interchange from PI 101,404B (Glycine soja).


Research Notes : United States : Molecular Analysis Of Organelle Genomes Of A Cytoplasmically Inherited Nrutant Of Soybean, R. C. Shoemaker, R. G. Palmer, A. G. Atherly Apr 1984

Research Notes : United States : Molecular Analysis Of Organelle Genomes Of A Cytoplasmically Inherited Nrutant Of Soybean, R. C. Shoemaker, R. G. Palmer, A. G. Atherly

Soybean Genetics Newsletter

Very little is known about the physical and molecular organization of the genomes of plant organelles. Unlike the genes of a nuclear genome, which can be recombined by selective matings and mapped by recombinational events, the genes on an organelle genome are usually inherited as a unit, solely through a single parent. Therefore, when a uniparentally inherited mutation is observed, it is usually not possible to determine the location of the gene relative to other genes on the organelle genome, nor is it usually possible to determine genetically the organelle genome responsible for the mutant phenotype.


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency : To Evaluate Soybean Germplasm For Biological Efficiency In - Micronutrient Uptake, M. R. Reddy Apr 1984

Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency : To Evaluate Soybean Germplasm For Biological Efficiency In - Micronutrient Uptake, M. R. Reddy

Soybean Genetics Newsletter

An investigation was carried out to evaluate soybean germplasm response to (1) manganese deficiency and toxicity, (2) various rates of manganese application, and (3) to different soil pH levels on manganese accumulation by the germplasm lines and their yield. Manganese rates were 0, 10, and 20 kg/ha. The pH levels were 5.3, 6.3, and 7.0. The germplasm lines tested were PI 159319, PI 324924, PI 960895 and L-76-0132.


Research Notes : United States : A Soybean X Glycine Tomentella Hybrid: Progress And Problems, T. Hymowitz, R. J. Singh Apr 1984

Research Notes : United States : A Soybean X Glycine Tomentella Hybrid: Progress And Problems, T. Hymowitz, R. J. Singh

Soybean Genetics Newsletter

Newell and Hymowitz (1982) reported successful hybridization between the soybean (cv 'Altona') (2n = 40) and a wild perennial relative Glycine tomen-tella (IL 428) (2n = 78). The F1 plant was completely sterile (2n = 3x = 59). A graft of the F1 plant was made on to the cv 'Williams'. The chromosome num-ber of the grafied plant was doubled (2n = 6x = 118) by treatment with 0.1% colchicine. The F1 colchicine-treated plant-produced two pods containing three seeds.


Soybean Genetics Committee Report, R. L. Bernard, W. D. Beversdorf, H. R. Boerma, T. E. Devine, T. C. Kilen, J. H. Orf, R. G. Palmer, J. R. Wilcox Apr 1984

Soybean Genetics Committee Report, R. L. Bernard, W. D. Beversdorf, H. R. Boerma, T. E. Devine, T. C. Kilen, J. H. Orf, R. G. Palmer, J. R. Wilcox

Soybean Genetics Newsletter

No abstract provided.


Research Notes : United States : Is The Ms4 Male-Sterile Nrutant Partially Fertile?, Robert Graybosch, R. G. Palmer Apr 1984

Research Notes : United States : Is The Ms4 Male-Sterile Nrutant Partially Fertile?, Robert Graybosch, R. G. Palmer

Soybean Genetics Newsletter

The ms male-sterile mutant is inherited as a recessive allele. Plants homozygous 1or ms4 are male-sterile; heterozygotes are completely male-fertile. Male-sterility in the ms4 system results from the absence of cytokinesis fol-lowing telophase II of microsporogenesis (Delannay and Palmer; 1982).


Research Notes : United States : Inheritance Of A Second Leucine Amino-Peptidase Locus And Tests Of Its Linkage With Other Loci, Y. T. Kiang, Y. C. Chiang, M. B. Gorman Apr 1984

Research Notes : United States : Inheritance Of A Second Leucine Amino-Peptidase Locus And Tests Of Its Linkage With Other Loci, Y. T. Kiang, Y. C. Chiang, M. B. Gorman

Soybean Genetics Newsletter

In dry soybean seed, only one leucine amino peptidase (LAP) anodal band was observed by acrylamide slab gel electrophoresis (Gorman et al., 1983). This band gradually declined in intensity and disappeared in all tissues about 10-12 days after germination. Three mobility variants (Rf's 0.59, 0.53,and 0.58) were observed in the band, which was controlled by a single locus (Gor-man et al., 1983; Kiang and Gorman, 1983; Gorman, 1983).


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency : To Evaluate Soybean Germplasm And Cultivars For Stress Tolerance Toward - Moisture Stress, B. T. Singh Apr 1984

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

Soybean Genetics Newsletter

Soybean genotypes were screened for water-stress tolerance in a split-plot experimental design with four replications. Irrigated and stress treatments were assigned main plots and the genotypes were assigned subplots. The stress water condition was induced by covering the plots with plastic.


Research Notes : Zambia : Summary Of National Soybean Variety Test (1982/83), J. M. Joshi, F. Javaheri, S. Nkumbula Apr 1984

Research Notes : Zambia : Summary Of National Soybean Variety Test (1982/83), J. M. Joshi, F. Javaheri, S. Nkumbula

Soybean Genetics Newsletter

Results of the National Soybean Variety Trial are reported in Tables 1 and 2. Sixteen entries, comprising seven recommended varieties and nine new promising cultivars, were tested at seven different locations. Though the season started favorably, rains in December, 1982, were inade-quate in the southern half of the country for good stand establishment.


Research Notes : India : Phenotypic Stability Of Soybean Genotypes For Field Germination, P. Talukdar, B. K. Konwar Apr 1984

Research Notes : India : Phenotypic Stability Of Soybean Genotypes For Field Germination, P. Talukdar, B. K. Konwar

Soybean Genetics Newsletter

Germination of seed is a limiting factor in successful cultivation of soybean in northeast India. Information regarding genotype x environment (GE) interaction and phenotypic stability of different genotypes for field germination percentage is of considerable importance in order to isolate the most stable genotypes with uniform germination potential over variable environments. The present study, therefore, was designed to study the phenotypic stability of ten soybean genotypes grown in six different environments.


Research Notes : United States : A Method Of Isolating Poly(A)-Containing Rna From Soybean Suspension Culture Cells For Cdna Synthesis And Cloning, J. Brown, R. Treick, K. Wilson Apr 1984

Research Notes : United States : A Method Of Isolating Poly(A)-Containing Rna From Soybean Suspension Culture Cells For Cdna Synthesis And Cloning, J. Brown, R. Treick, K. Wilson

Soybean Genetics Newsletter

Our laboratories are interested in using recombinant DNA techniques to study the genetics of amino acid metabolism in soybeans. An especially useful technique used to study gene regulation is the in vitro synthesis of DNA com-plementary to mRNA; this cDNA can be used directly as a hybridization probe, or cloned and amplified in a suitable host. The protocol described here was developed for isolating total cellular poly{A)-containing RNA from soybean suspension culture cells of sufficient purity for use as a template for cDNA synthesis.