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

1982

Articles 1 - 30 of 51

Full-Text Articles in Entire DC Network

Research Notes : Factor Analysis In F2 Generation Of Soybean Crosses, S. K. Sharma, B. M. Ashawa, N. D. Rana Apr 1982

Research Notes : Factor Analysis In F2 Generation Of Soybean Crosses, S. K. Sharma, B. M. Ashawa, N. D. Rana

Soybean Genetics Newsletter

Factor analysis is a technique of reducing a large number of correlated variables to a few main factors. It has been resorted to to overcome the limi-tations of univariate methods of analysis like correlations, path-coefficient and regression analysis (Wright, 1960; Walton, 1972). Besides, Moreno and Cubero (1978) have used it for estimating diversity.


Research Notes : Association Among Productivity, Responsiveness And Stability For Different Groups Of Traits In Soybean, V. P. Gupta, I. K. Garg, N. D. Rana Apr 1982

Research Notes : Association Among Productivity, Responsiveness And Stability For Different Groups Of Traits In Soybean, V. P. Gupta, I. K. Garg, N. D. Rana

Soybean Genetics Newsletter

In India, soybean adaptability trials have revealed that, in order to stabilize yield and popularize soybean cultivation, breeders must look for genotypes with good germinability and wider adaptability under diverse geographical and climatological situations (Singh, 1976). Prospects of develop-ing different genotypes having varying degrees of adaptability would depend to some extent on the relationship between various adaptability parameters; namely, di (additive genetic effect-productivity), Si (genotypic regression -a measure of responsiveness), sd2 (deviation from regression - a measure of stability). This has been attempted in the present study on the same material as reported earlier (Gupta et al., 1981) by working out ...


Research Notes : Correlation Among Seed Yield, Seed Quality And Nutritional Traits In Soybean, N. D. Rana, R. Kumari Kalia, V. P. Gupta Apr 1982

Research Notes : Correlation Among Seed Yield, Seed Quality And Nutritional Traits In Soybean, N. D. Rana, R. Kumari Kalia, V. P. Gupta

Soybean Genetics Newsletter

Introduction : In the present communication, the information obtained on correlations among 14 traits related to seed yield, seed quality and nu-trition in soybean germplasm has been discussed, The information on the nature of variation for these traits in the above material has been reported earlier (Rana et al., 1981). Materials and methods : The materials and methods were reported earlier by Rana et al. (1981).


Research Notes : Variation And Heritability For Leaf And Root Characteristics In Soybean, Across Locations, V. P. Gupta, I. K. Garg, N. D. Rana, J. M. Singh Apr 1982

Research Notes : Variation And Heritability For Leaf And Root Characteristics In Soybean, Across Locations, V. P. Gupta, I. K. Garg, N. D. Rana, J. M. Singh

Soybean Genetics Newsletter

Introduction : Generally yield of soybean has been reckoned in terms of yield components like pods per plant but it is only one aspect of an overall allometry for enumerating the soybean plant. The other components which need attention are the physiological and root characteristics, which remained ignored so far in breeding programs (Adam, 1975). To surpass the yield plateau in soybean, it is imperative that we pay due attention to these traits with a view to increase the photosynthetic efficiency and translocation activities through the genetic improvement of leaf and root characteristics.


Research Notes : Soybean Emergence In Clay Soil And Tolerance To Phytophthora Rot, R. I. Buzzell, T. R. Anderson Apr 1982

Research Notes : Soybean Emergence In Clay Soil And Tolerance To Phytophthora Rot, R. I. Buzzell, T. R. Anderson

Soybean Genetics Newsletter

In 1979 at the Woodslee Soil Substation, 19 F2 populations were planted May 23 in single-row plots, 100 seeds per row, with 12 replications. These populations consisted of 'Williams' x 'Wells', and Williams and Wells each by 'Adams', 'Beeson', 'Bonus', 'Galland', 'Corsoy', 'Cutler 71', 'Hark', 'Kanrich' and 'Prize'. The field had been in continuous soybeans since 1973 and is known to be infested predominantly with race 7 of Phytophthora mega-sperma f. sp. glycinea (Pmg).


Rscre Meeting Report, Soybean Genetics Newsletter Apr 1982

Rscre Meeting Report, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : Extent Of Selfing During Crossing In Soybean, Hari Har Ram, V. D. Verma, Kamendra Singh, Pushpendra Apr 1982

Research Notes : Extent Of Selfing During Crossing In Soybean, Hari Har Ram, V. D. Verma, Kamendra Singh, Pushpendra

Soybean Genetics Newsletter

Soybean is a strictly self-pollinated crop and crossing between two va-rieties is rather difficult due to small size of flowers and low pod setting (Ram et al., 1981). The crossed pods usually have reduced size and, hence, have fewer seeds/pod. The seeds obtained from the crossed pods may include some seeds that might be due to selfing while crossing.


Research Notes : The Genetic Basis Of Physiological Races Of Phytophthora, V. D. Leudders Apr 1982

Research Notes : The Genetic Basis Of Physiological Races Of Phytophthora, V. D. Leudders

Soybean Genetics Newsletter

All characters of living organisms. whether morphological, physiological, or biochemical, undoubtedly are genetically determined. The ability of a Eew microorganisms to attack a limited range of plant species and the within-species variation in disease development also are presumed to have genetic bases. Such a variation in disease expression was used to develop the gene-for-gene concept (Flor, 1955).


Research Notes : Calico Mosaic Of Soybeans: Sources Of Resistance And Inheritance Of Reaction, A. M. R. Almeida, Romeu A. S. Kiihl, Leones A. Almeida Apr 1982

Research Notes : Calico Mosaic Of Soybeans: Sources Of Resistance And Inheritance Of Reaction, A. M. R. Almeida, Romeu A. S. Kiihl, Leones A. Almeida

Soybean Genetics Newsletter

Calico mosaic of soybean is caused by the alfalfa mosaic virus (AMV) (Almeida et al., 1981). Soybean plants infected with AMV were first reported in the USA by Allington et al. (1969), in soybean fields close to alfalfa fields. The presence of AMV in Brazil was reported by Costa et al. (1980), who demonstrated in their study that soybean was a good differential host for the virus.


Research Notes : Electrophoretic Classification Of The Early Maturity Groups Of Named Soybean Cultivars, M. B. Gorman, Y. T. Kiang, Y. C. Chiang, Reid G. Palmer Apr 1982

Research Notes : Electrophoretic Classification Of The Early Maturity Groups Of Named Soybean Cultivars, M. B. Gorman, Y. T. Kiang, Y. C. Chiang, Reid G. Palmer

Soybean Genetics Newsletter

Over the last several years, our lab has been collecting electrophore-tic data for several enzyme systems in G. max and G. soja. While we have not yet completed analysis of all the available G. max or G. soja accessions, we have completed electrophoretic profiles for most of the named soybean cultivars in the early maturity groups (OOO-IV). We have been interested in using these electrophoretic profiles for cultivar identification, since a fairly complete identification can be made (Gorman and Kiang, 1977; and an article in preparation).


Research Notes : Greenhouse Determination Of Soybean Tolerance To Phytophthora Rot, R. I. Buzzell, C. G. Mortimore, J. H. Haas Apr 1982

Research Notes : Greenhouse Determination Of Soybean Tolerance To Phytophthora Rot, R. I. Buzzell, C. G. Mortimore, J. H. Haas

Soybean Genetics Newsletter

One method of determing field tolerance of soybeans to Phytophthora mega-sperma f. sp. glycinea (Hildeb.) Kaun & Erwin (Pmg) is to determine the percent of plant loss from emergence to maturity for cultivars grown in an infested field under conditions favorable for the disease (Buzzell and Anderson, 1982). Drawing upon the field results and the results of two unpublished greenhouse experiments (given below), a greenhouse technique similar to the field test was developed. 1962 Experiment : Cores of soil were obtained from a field known to be in-fested with Pmg race 1, the field having been used in a previous study (Ful-ton ...


Research Notes : Notes On Soybean Nodulation With The Indigenous Rhizobium In Zambian Soils, F. Javaheri, R. Nyemba Apr 1982

Research Notes : Notes On Soybean Nodulation With The Indigenous Rhizobium In Zambian Soils, F. Javaheri, R. Nyemba

Soybean Genetics Newsletter

Introduction : The work reported here was carried out under the auspi-ces of National Oilseeds Development Programme supported by the Research Branch, Department of Agriculture, Ministry of Agriculture and Water Development, Government of the Republic of Zambia, and the Food and Agriculture Organization of the United Nations. In the 1977-78 season, the couunercially grown soybean variety 'Hernon 147' was noticed to have nodulated profusely in a virgin land, without artificial seed inoculation. This was in the Mkushi area where soybean production then had just begun to expand.


Research Notes : Genetics Of Black Pigmentation Of Soybean Seedcoats/Hila, R. I. Buzzell, B. R. Buttery Apr 1982

Research Notes : Genetics Of Black Pigmentation Of Soybean Seedcoats/Hila, R. I. Buzzell, B. R. Buttery

Soybean Genetics Newsletter

Gene T is involved in black pigmentation and w1 in the presence of t is involved in imperfect black pigmentation (Bernard and Weiss, 1973). Tis a phenolase gene resulting in quercetin formation and brown pubescence (Buttery and Buzzell, 1973); W is a flower and hypocotyl-color gene (Hartwig and Hinson, 1962). Thin layer chromatography shows two major 'spots' involved in black pigmentation of soybean seed coats.


Research Notes : New Breeding Lines Of Soybean Developed At Pantnagar, Hari Har Ram, V. D. Verma, Kamendra Singh, Pushpendra Apr 1982

Research Notes : New Breeding Lines Of Soybean Developed At Pantnagar, Hari Har Ram, V. D. Verma, Kamendra Singh, Pushpendra

Soybean Genetics Newsletter

The major breeding objectives of the soybean breeding project at this university have been: high seed yield, early maturity, better seed quality and resistance particularly to yellow mosaic virus, bacterial pustule, and Rhizoctonia aerial blight. The suitable donors have been identified and are being used in the crossing program (Ram et al., 1981). A total of 270 newly selected breeding lines from the advanced generations derived from the crossing program (pedigree method of breeding) were evnluated in 15 different trails, each consisting of 18 new breeding lines and 2 checks, i.e., 'Alankar' and 'Bragg'.


Research Notes : Decapitation Technique To Increase Grain Yield In Soybean, Huu Tin Chu Apr 1982

Research Notes : Decapitation Technique To Increase Grain Yield In Soybean, Huu Tin Chu

Soybean Genetics Newsletter

In soybean, pod clusters were generally formed at the nodes of stem and/ or at those of branch, but at the higher nodes, pod clusters failed to develop sufficiently, pods and seeds seemed to be smaller and empty (unfilled). Then, if we can control its branching capability, and cause branching earlier and more numerous to bring out more flower and pod clusters at the nodes of mid-stem and those of mid-branch, it will be sure that flowering and/or pod fonnation occur at short interval of time and be numerous. In spring, soybean grown in well-amended soil, if subjected to ...


Research Notes : Exotic Soybean Observational Yield Performance Trial In Kien Gian Province --Mekong Delta --Vietnam --Dry Season 1981-1982, Van Thieu Nguyen, Huu Tin Chu, Van Hiep Tran, Van Lau Van Dao, Cong Khanh Vo Apr 1982

Research Notes : Exotic Soybean Observational Yield Performance Trial In Kien Gian Province --Mekong Delta --Vietnam --Dry Season 1981-1982, Van Thieu Nguyen, Huu Tin Chu, Van Hiep Tran, Van Lau Van Dao, Cong Khanh Vo

Soybean Genetics Newsletter

In the light of mutual technical assistance, six soybean varieties, namely 'Bon minori' (2 lines), 'Enrei' (2 lines), 'Akiyoshi' and 'Hyuuga', were forwarded by registered mail from Japan to Vietnam in May, 1981. Due to its long postal course, soybean seed was only received in November 1981. A month later, seeds were planted on December 10, 1981, at the provincial seed farm of Kien Giang province and then harvested on February 26, 1982.


Research Notes : Genotype X Environment Interaction In Soybean: I. Individual Regression Analysis., V. P. Gupta, I. K. Garg, N. D. Rana Apr 1982

Research Notes : Genotype X Environment Interaction In Soybean: I. Individual Regression Analysis., V. P. Gupta, I. K. Garg, N. D. Rana

Soybean Genetics Newsletter

In this communication, the results obtained from the material given earlier (Gupta et al., 1981) on the basis of individual regression analysis by using Perkins and Jinks (1968) model, have been presented for different traits groupwise. In the individual regression analysis, genotypes having nonsignificant regression m.s. as well as remainder m.s. against error m.s. were described as exhibiting absence of genotype x environment (g x e) interaction, genotypes having regression m.s. significantly different from error m.s. were designated as showing predictable g x e (linear g x e) interaction, and genotypes having only significant remainder ...


Research Notes : Genetic, Altitude And Climatic Effects On Seed Yield And Germinability Traits In Soybean, V. P. Gupta, N. D. Rana, R. K. Sharma, Gopi Chand Apr 1982

Research Notes : Genetic, Altitude And Climatic Effects On Seed Yield And Germinability Traits In Soybean, V. P. Gupta, N. D. Rana, R. K. Sharma, Gopi Chand

Soybean Genetics Newsletter

Introduction : In soybean production, the lack of varieties having good seed quality, with respect to germinability, is an important constraint. Though several authors (Johnson et al., 1955; Schutz and Bernard, 1967; Shorter et al., 1977) have reported the role of genotype, environment, and genotype x environmental interaction for seed yield and seed weight, yet such information in respect to seed quality traits, such as percent hard seeds and germinahility is meager (Gupta and Garg, 1980). Therefore, in the present study, an attempt has been made to obtain information on the role of genetic, altitude and other climatic factors on seed ...


Research Notes : Effect Of Environment And Cropping System On The Coefficients Of Variability For Seed Yield, Quality, Structural, Phenological And Physiological Traits In Soybeans, V. P. Gupta, I. K. Garg, N. D. Rana Apr 1982

Research Notes : Effect Of Environment And Cropping System On The Coefficients Of Variability For Seed Yield, Quality, Structural, Phenological And Physiological Traits In Soybeans, V. P. Gupta, I. K. Garg, N. D. Rana

Soybean Genetics Newsletter

Introduction : In the present investigation, the results obtained on the effects of environment and cropping system on the parameters of genetic variability for seed yield, quality, structural, phenological and physiological traits in soybean have been presented. Materials and methods : The material, experimental design and characters studied were the same as reported by Gupta et al. (198la). The data were further analyzed as per Johnson et aL (1955) for estimating various parameters of variability in different environments and cropping systems.


Research Notes : Genotype X Environment Interaction In Soybean : Ii. Joint Regression Analysis, V. P. Gupta, I. K. Garg, N. D. Rana Apr 1982

Research Notes : Genotype X Environment Interaction In Soybean : Ii. Joint Regression Analysis, V. P. Gupta, I. K. Garg, N. D. Rana

Soybean Genetics Newsletter

The individual regression analysis has been given in the previous com-munication. In this article the results obtained from joint regression analysis (Table 1) according to Perkins and Jinks (1968) for all the groups of characters except leaf potential and leaf area where conventional g x e interaction analysis was done, are being presented. The method and mater-ials and the layout of the experiment was the same as reported by Gupta et al. (1981). The groupwise results obtained are given below.


Research Notes : Preliminary Electrophoretic Observations From Several Soybean Enzymes, M. B. Gorman, Y. T. Kiang, Y. C. Chiang, Reid G. Palmer Apr 1982

Research Notes : Preliminary Electrophoretic Observations From Several Soybean Enzymes, M. B. Gorman, Y. T. Kiang, Y. C. Chiang, Reid G. Palmer

Soybean Genetics Newsletter

We have been studying a number of enzyme systems electrophoreticalJy in both cultivated (G. max) and wild soybeans (G. soja), as well as in related species (Gorman and Kiang, 1977; 1978; Kiang, 1981; Gorman et al., n.d.). Our primary concern has been to measure genetic variation within and between wild and cultivated soybeans. We would like to report some miscellaneous observations from our work that have not been previously reported.


Research Notes : Soybean Linkage And Crossover Tests, R. I. Buzzell, R. D. Walker Apr 1982

Research Notes : Soybean Linkage And Crossover Tests, R. I. Buzzell, R. D. Walker

Soybean Genetics Newsletter

A previous test (Buzzell, 1977) indicated a possible linkage (39.8 .±. 3.0%) between Fg1 and Dt1. An additional test with F2 plants of a cross of two 'Harosoy' isolines (fg1 dt1 x Fg1 Dt1) indicates that the two genes are independent (Table 1). In reporting on the genetics of flavonol classes 9T to 16T, Buzzell and Ruttery (1974) indicated that the 9t to 16t classes which involve fg4t had not been observed.


Research Notes : A Somatic Approach To Soybean Genetics, Jill Roth, K. G. Lark Apr 1982

Research Notes : A Somatic Approach To Soybean Genetics, Jill Roth, K. G. Lark

Soybean Genetics Newsletter

For the past five years, our laboratory has been attempting to establish a system of somatic cell genetics for soybean. Although our results are far from complete, they are sufficiently encouraging to suggest that such a system will be practical and that it should be possible to construct a complete genetic. map within a few years. The rapidity with which this can be done relies in part on the somatic genetics discussed in this report and in part on a molecular genetic analysis which is now underway.


Research Notes : Screening For Photoperiod Insensitivity Under Natural Conditions In Soybean, Hari Har Ram, Kamendra Singh, Pushpendra, V. D. Verma Apr 1982

Research Notes : Screening For Photoperiod Insensitivity Under Natural Conditions In Soybean, Hari Har Ram, Kamendra Singh, Pushpendra, V. D. Verma

Soybean Genetics Newsletter

Early varieties of soybean have been found to be less sensitive to photo-periods than late varieties (Johnson et al., 1960). Therefore, it was postulated that some of the early strains of soybean may have no photoperiod requirement and accordingly screening for insensitivity to photoperiod was car-ried out in 498 early lines of soybean. These germplasm lines were evaluated for days to flowering and several morphological traits under two different seasons, viz., rainy season, 1978, and spring/summer season, 1979.


Research Notes : Yield Evaluation Of Immature, Green Soybeans, S. Shanmugasundaram, T. S. Toung, R. B. Almodiente Apr 1982

Research Notes : Yield Evaluation Of Immature, Green Soybeans, S. Shanmugasundaram, T. S. Toung, R. B. Almodiente

Soybean Genetics Newsletter

Soybeans are commonly called the "meat of the fields" in the orient. Soybean is a popular vegetable in oriental diet and is rich in vitamins A and B and is a good source of protein, fat, calcium, phosphorous and iron. Soybean as a vegetable can be grown easily even during the rainy season since the final product to be harvested is immature green seed.


Usda Soybean Germplasm Reports, Soybean Genetics Newsletter Apr 1982

Usda Soybean Germplasm Reports, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : A Dwarf Mutation In 'Hodgson' Soybean, K. Sadanaga, R. Grindeland Apr 1982

Research Notes : A Dwarf Mutation In 'Hodgson' Soybean, K. Sadanaga, R. Grindeland

Soybean Genetics Newsletter

A dwarf mutation was found in a line derived from radiated 'Hodgson' grown at the Bruner Farm near Ames, IA. The mutant plants were 6 to 10 cm tall, had necrotic leaves, and produced no seeds. twenty-four plants randomly picked from segregating plots were progeny-tested in a greenhouse and in the field.


Research Notes : Genetic Analysis Of A Chlorophyll Deficient, Tan-Saddle Mutant, Randy C. Shoemaker, Reid G. Palmer Apr 1982

Research Notes : Genetic Analysis Of A Chlorophyll Deficient, Tan-Saddle Mutant, Randy C. Shoemaker, Reid G. Palmer

Soybean Genetics Newsletter

In the 1961 Uniform Soybean Test II, seeds with a tan-saddle pattern were found among normally yellow-seeded 'Harosoy' plants. The tan-saddle pattern was found to breed true, and is now designated k2. The Harosoy line from which k2 was derived is designated T239 in the Genetic Type Collection.


Research Notes : The Lectin Content In Different Varieties Of Soybean In Connection With Improving Nutritive Qualities, E. L. Golynskaya, M. V. Kovalchuk, V. I. Sichkar, V. F. Marjushkin, A. P. Levitskij Apr 1982

Research Notes : The Lectin Content In Different Varieties Of Soybean In Connection With Improving Nutritive Qualities, E. L. Golynskaya, M. V. Kovalchuk, V. I. Sichkar, V. F. Marjushkin, A. P. Levitskij

Soybean Genetics Newsletter

The nutritional value of soybean protein is reduced in certain rate by inhibitors of tripsin, chemotripsin and lectins, too. Proteins that are capable of linking surface structures of erythrocytes and other type of cells to cause their agglutination, are called phytohemagglutinins or lec-tins. Moreover, they form complexes with many polysaccharides.


Research Notes : Reaction Of Soybean C Ultivars To Temik (Aldicarb) And Inheritance Of The Reaction, Romeu A. S. Kiihl, Leones A. Almeida Apr 1982

Research Notes : Reaction Of Soybean C Ultivars To Temik (Aldicarb) And Inheritance Of The Reaction, Romeu A. S. Kiihl, Leones A. Almeida

Soybean Genetics Newsletter

Temik (aldicarb) is a systemic insecticide not connnonly used in soybeans. Soybean researchers in general have problems to control spider mites in greenhouses. Temik proved to be an excellent product to control these pests.