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Iowa State University

Plant Sciences

Soybean Genetics Newsletter

1983

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Research Notes : A New Gene For Peanut Mottle Virus Resistance In Soybean, G. R. Buss, C. W. Roane, S. A. Tolin Apr 1983

Research Notes : A New Gene For Peanut Mottle Virus Resistance In Soybean, G. R. Buss, C. W. Roane, S. A. Tolin

Soybean Genetics Newsletter

Boerma and Kuhn (1976) established that 'Dorman' and 'CNS' each contain a single dominant gene conditioning resistance to peanut mottle virus (PMV). The gene was labelled Rpv, but it was not demonstrated that the genes in the cultivars were allelic. Shipe et al. (1979) also demonstrated the presence of single dominant genes for PMV resistance in each of 'Arksoy', 'PI 89784' and 'PI 219789', but made no tests for allelic relationships.


Research Notes : Activity Of Trypsin And Chymotrypsin Inhibitors Of Soybean Forms With Different Resistance To Soybean Borer, V. I. Sichkar, A. P. Levitsky, O. A. Grikun, V. N. Lobko, V. F. Marj'ushkin Apr 1983

Research Notes : Activity Of Trypsin And Chymotrypsin Inhibitors Of Soybean Forms With Different Resistance To Soybean Borer, V. I. Sichkar, A. P. Levitsky, O. A. Grikun, V. N. Lobko, V. F. Marj'ushkin

Soybean Genetics Newsletter

In a previous investigation, the wide amplitude of plant resistance of different soybean varieties to soybean borer has been discovered. Our further experiments are directed at the discovery of the main mechanisms of this resistance. It is known that the phenomenon of plant resistance to in-sects may be classified into three components: nonpreference, antibiosis, and tolerance (Painter, 1951). We use the term nonpreference when the plant is an unfavorable object for feeding and oviposition.


Author Index, Soybean Genetics Newsletter Apr 1983

Author Index, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : The T270h Chlorotic Mutant: Inheritance And Linkage Analysis, David M. Stelly, Reid G. Palmer Apr 1983

Research Notes : The T270h Chlorotic Mutant: Inheritance And Linkage Analysis, David M. Stelly, Reid G. Palmer

Soybean Genetics Newsletter

An unusual chlorotic mutant that is variably viable was found in 1977. Preliminary inheritance data and phenotypes of the mutant were described by Stelly, Muir and Palmer in 1979. Combined F2 plant and F3 family analyses suggested monogenic recessive inheritance of the chlorotic phenotype.


Research Notes : Studies In Polyploidy In Soybeans: Cytologically Identified Tetraploid Glycine Max And Glycine Soja And A Preliminary Observation On Seed Yields Of Tetraploid 'Williams' Plants, S. H. Cheng, Henry H. Hadley Apr 1983

Research Notes : Studies In Polyploidy In Soybeans: Cytologically Identified Tetraploid Glycine Max And Glycine Soja And A Preliminary Observation On Seed Yields Of Tetraploid 'Williams' Plants, S. H. Cheng, Henry H. Hadley

Soybean Genetics Newsletter

A partial list of cytologically identified Glycine soja genotypes is presented in Table 1. apparently are new at the tetraploid level. tetraploid Glycine max and Some of these genotypes Sixty-three (63) single plants of tetraploid Williams were harvested on the Agronomy South Farm at Urbana in 1982.


Research Notes : Mutagenesis Of Soybeans, Sarah A. Ryan, James E. Harper Apr 1983

Research Notes : Mutagenesis Of Soybeans, Sarah A. Ryan, James E. Harper

Soybean Genetics Newsletter

The value of mutants in elucidating biochemical processes has been well-demonstrated in simple organisms. However, the approach has seldom been used in plants where simple selection schemes for biochemical characters can be difficult to devise. We have proposed that selection of a nitrate-reductase-(NR) deficient mutant of soybean could have a beneficial effect on nitrogen fixation.


Research Notes : Effect Of Seed Production Environment On Genetic Differences In Cold Toler Ance During Germination, D. W. Unander, J. W. Lambert, J. H. Orf Apr 1983

Research Notes : Effect Of Seed Production Environment On Genetic Differences In Cold Toler Ance During Germination, D. W. Unander, J. W. Lambert, J. H. Orf

Soybean Genetics Newsletter

Genetic variability for cold tolerance in soybeans has been reported by a number of researchers (Hillsman et al., 1977; Holmberg, 1973; Hume and Jackson, 1981; Hwang, 1979; Lambert, 1978, Littlejohns and Tanner, 1976; Spehar, 1977). Selection experiments for cold tolerance generally have pur-sued either vigorous germination and emergence or success in flowering and pod set. Neither is fully understood, although they appear to be indepen-dent of each other (Holmberg, 1973; Hume, personal communication).


Research Notes : Midwest Soybean Rhizobotanical Survey, R. W. Zobel Apr 1983

Research Notes : Midwest Soybean Rhizobotanical Survey, R. W. Zobel

Soybean Genetics Newsletter

Plant root systems have a characteristic morphology that is modified by the edaphic conditions in which they grow. Soil texture, moisture, temperature, and depth of penetrable soil all modify root morphology. Genetic characteristics of the plant control the basic root morphological characteristics.


Announcements, Soybean Genetics Newsletter Apr 1983

Announcements, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : Inheritance Of Soybean Electrophoretic Variants, M. B. Gorman, Y. T. Kiang, Reid G. Palmer, Y. C. Chiang Apr 1983

Research Notes : Inheritance Of Soybean Electrophoretic Variants, M. B. Gorman, Y. T. Kiang, Reid G. Palmer, Y. C. Chiang

Soybean Genetics Newsletter

We have been using the technique of slab-gel electrophoresis (see Gorman and Kiang, 1977, 1978; Kiang, 1981; Kiang and Gorman, 1983, for methods) to study genetic diversity in G. max and G. soja. In last year's Soybean Genet-ics Newsletter, we reported the accession-specific zymogram types (zymogram types are equivalent to phenotypes) observed in 253 named cultivars (maturi-ty groups 00-IV) for 15 enzyme systems (Gorman et al., 1982b). We have been studying the genetic basis for the differences between these zymogram types.


Research Notes : Cyst Nematode Screening Methods, Indexes And Their Uses, K. D. Beatty, R. D. Riggs, Darrell Widick, C. E. Caviness, I. L. Eldridge, Floyd Hancock, John Davis Apr 1983

Research Notes : Cyst Nematode Screening Methods, Indexes And Their Uses, K. D. Beatty, R. D. Riggs, Darrell Widick, C. E. Caviness, I. L. Eldridge, Floyd Hancock, John Davis

Soybean Genetics Newsletter

The threat of the soybean cyst nematode, Heterodera glycines Ichinohe, to soybean in the North Central States of the United States is continuing and will likely increase in severity with time. Southern states have dealt with this pest for a number of years and states with large acreages have designed screening methods to detect and test for nematode resistance. This report describes the screening method used at the Northeast Research and Extension Center, Keiser, Arkansas.


Research Notes : Dry Matter In Yield And Branching Ability As Selection Parameters In Soybean, Kamendra Singh, Hari Har Ram Apr 1983

Research Notes : Dry Matter In Yield And Branching Ability As Selection Parameters In Soybean, Kamendra Singh, Hari Har Ram

Soybean Genetics Newsletter

During the process of varietal development, a large number of new breed-ing lines of soybean (PK-series) generated through hybridization and selection are evaluated each year at this centre and elite ones (about 40) are maintained for further use. A brief report of some of these lines has been published (Ram et al., 1982). A path-coefficient analysis using typical yield components and the physiological parameters of yield, viz. dry matter yield (above ground parts), harvest index and seed yield efficiency, was carried out in 50 soybean genotypes (40 new PK-series lines + 10 parental/check cultivars) evaluated during rainy season 1980.


Research Notes : Seed Set On G. Falcata And A Proposal To Use Ms2 Male-Sterility In Its Hybridization With G. Max, James Michael Anderson, Thomas E. Carter Jr., Barry A. Martin, Joe W. Burton Apr 1983

Research Notes : Seed Set On G. Falcata And A Proposal To Use Ms2 Male-Sterility In Its Hybridization With G. Max, James Michael Anderson, Thomas E. Carter Jr., Barry A. Martin, Joe W. Burton

Soybean Genetics Newsletter

Seed set: Limited seed supply has severely curtailed research on G. falcata. Seed supply is limited primarily because G. falcata sets few seed in the greenhouse, even though flower production is rather profuse. We noticed this past summer that seed set is quite high when we grow this species out-of-doors near a honeybee hive.


Research Notes : Trisomic Inheritance Of A Chimera In Soybean, K. E. Newhouse, L. Hawkins, Reid G. Palmer Apr 1983

Research Notes : Trisomic Inheritance Of A Chimera In Soybean, K. E. Newhouse, L. Hawkins, Reid G. Palmer

Soybean Genetics Newsletter

Introduction: In the summer of 1978, four chlorophyll-chimeric plants were observed within a population of 'Clark'. The four plants had a similar phenotype, and were surmised to originate from a common parent. These four plants were single-plant threshed.


Research Notes : Variation In Water Absorbing Capacity Of Soybean Seeds, Lolita Ragus, Henry H. Hadley Apr 1983

Research Notes : Variation In Water Absorbing Capacity Of Soybean Seeds, Lolita Ragus, Henry H. Hadley

Soybean Genetics Newsletter

Water-absorbing capacity (WAC) of soybean seeds is an important factor in the efficient production of soy food products in Japan and other Asiatic countries. Variation in WAC, therefore, should interest persons in the USA concerned with exporting soybeans to these countries. Soybeans vary in WAC depending upon soaking conditions (e.g., temperature and length of soaking time), initial moisture content of the seed, quality of the seed coat, and probably genotype. We are interested in learning the relative importance of genotype.


Research Notes : Four Additional Lines Showing Nonfluorescent Roots, Reid G. Palmer, Xavier Delannay, Steven Broich Apr 1983

Research Notes : Four Additional Lines Showing Nonfluorescent Roots, Reid G. Palmer, Xavier Delannay, Steven Broich

Soybean Genetics Newsletter

Fluorescence in soybean roots was first described by Chmelar (1934) and by Chmelar and Mostovoj (1934). Reports of nonfluorescing root phenotypes in both Glycine max and G. soja have been made by Grabe (1957), Fehr and Giese (1971) and Broich (1978). Genetics studies by Delannay and Palmer (1982) indicate that absence of root fluorescence in G. max is controlled by four independent genes; three of these genes are recessive (fr1, fr2 and fr4) and one is dominant (Fr3).


Research Notes : Inheritance Of A Male-Sterile Mutant From Irradiated Essex Soybeans, G. R. Buss Apr 1983

Research Notes : Inheritance Of A Male-Sterile Mutant From Irradiated Essex Soybeans, G. R. Buss

Soybean Genetics Newsletter

In 1976, a plant was selected from the M3 generation of some 'Essex' soybeans that had been irradiated with neutrons and grown at the Eastern Virginia Research Station, Warsaw. The plant had a green stem and reduced seed set. The progeny row grown the following year had all normal appearing plants.


Research Notes : Tolerance/Resistance To Soybean Mosaic Virus, R. I. Buzzell Apr 1983

Research Notes : Tolerance/Resistance To Soybean Mosaic Virus, R. I. Buzzell

Soybean Genetics Newsletter

A natural epiphytotic of soybean mosaic virus (SMV) occurred at the Harrow Station in 1976. The disease, which was noted in early July, reduced plant growth. Advanced lines from 'Corsoy' x 'Chippewa 64' were being tested in the field in relation to their flavonol glycoside classification. Plants were rated for severity of leaf symptoms and seeds were rated for mottling.


Research Notes : Soybean Cultivar Response To Manganese, R. I. Buzzell, W. I. Findlay Apr 1983

Research Notes : Soybean Cultivar Response To Manganese, R. I. Buzzell, W. I. Findlay

Soybean Genetics Newsletter

Manganese deficiency of soybeans, Glycine max (L.) Merr., commonly oc-curs in southwestern Ontario. Observation of soybean fields indicated that cultivars differed in degree of Mn-deficiency symptoms. To test this obser-vation, 'Harosoy 63' and 'Harman' were grown in 3-replicate tests at six lo-cations in 1963; and, in 1964 and 1965, these cultivars were grown along with 'Hawkeye 63' and 'Lindarin 63' in 4-replicate tests at one location.


Research Notes : Influence Of Maturity Date On The Oil Content Of Soybeans With Genetically Altered Fatty Acid Composition, Brett F. Carver, Joe W. Burton, Richard F. Wilson Apr 1983

Research Notes : Influence Of Maturity Date On The Oil Content Of Soybeans With Genetically Altered Fatty Acid Composition, Brett F. Carver, Joe W. Burton, Richard F. Wilson

Soybean Genetics Newsletter

sed oleic acid percentage has been proven successful in decreasing the percentage of linolenic acid in soybean oil (Burton et al., 1983). In the first four cycles of selection, the percentage of oleic acid in the seed oil increased linearly at an average rate of 1.6 + 0.2% per cycle whereas linoleic and linolenic acid percentages showed linear decreases. Four additional cycles of selection for increased oleic acid and two cycles for decreased oleic acid levels are currently being evaluated in a wide range of environ-ments.


Research Notes : Implications Of Seed Set On Ms2 Ms2 Male-Sterile Plants In Raleigh, Thomas E. Carter Jr., Joe W. Burton, Earl B. Huie Jr. Apr 1983

Research Notes : Implications Of Seed Set On Ms2 Ms2 Male-Sterile Plants In Raleigh, Thomas E. Carter Jr., Joe W. Burton, Earl B. Huie Jr.

Soybean Genetics Newsletter

We conducted tests in the summers of 1981 and 1982 to determine seed set on the maturity group 3 cultivar 'Williams' and its ms2 ms2 male-sterile isoline. In these studies, Williams plants segregating for male sterility and the maturity group 5 cultivar, 'Forrest', were grown outdoors in pots at three isolated sites. We identified sterile and fertile plants immediately at flowering using standard pollen germination techniques.


Research Notes : Estimates Of Variation And Heritability For Nodule Mass And Recovery Of Rhizobium Japonicum Strain 110., R. R. Greder, J. H. Orf, J. W. Lambert Apr 1983

Research Notes : Estimates Of Variation And Heritability For Nodule Mass And Recovery Of Rhizobium Japonicum Strain 110., R. R. Greder, J. H. Orf, J. W. Lambert

Soybean Genetics Newsletter

Introduction: The increase of biological dinitrogen fixation has been an illusive and rather stochastic area of research for many soybean workers. One aspect of the symbiosis that merits more attention is the identification of genetic variability in host plants for the traits associated with fixation and the utilization of this variability in plant breeding programs. The purpose of the present study was to provide information on genetic variability for nodule mass and recovery of strain 110 in three soybean populations.


Addendum : Evaluation Of Soybean Genetic Stock Collection From South And Southeast Asia In Himalayan Midhills, N. D. Rana, Laxman Singh, Gopi Chand Apr 1983

Addendum : Evaluation Of Soybean Genetic Stock Collection From South And Southeast Asia In Himalayan Midhills, N. D. Rana, Laxman Singh, Gopi Chand

Soybean Genetics Newsletter

With the realization of protein gap in human nutrition and shortage of edible oils in India, great emphasis is being placed on extending the culti-vation of soybean in the country. Falling in line with this trend, varieties introduced from the United States of America, e.g., 'Bragg', 'Lee', 'Hardee', etc., were tested in comparison with 'Punjab No. l', in the midhill region of Himachal Pradesh at Kangra (the place of development of variety Punjab No. 1, evolved in early fifties, Singh et al., 1958), and it was realized that in this region the introductions were not superior to Punjab No ...


Usda Soybean Germplasm Reports, Soybean Genetics Newsletter Apr 1983

Usda Soybean Germplasm Reports, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : Locating Wm On Linkage Group 8, K. Sadanaga Apr 1983

Research Notes : Locating Wm On Linkage Group 8, K. Sadanaga

Soybean Genetics Newsletter

The genes reported on linkage group 8 (LG 8) are w1, wm, and ms1 (Soy-bean Genetics Committee, 1977). The recombination percentages between w1 and ms1 and w1 and wm are 29.7 ± 1.6 and 2.2 ± 0.5, respectively. However, the order of the genes is not known.


Research Notes : Screening For Cyst Nematode Resistance In Soybean Breeding, Sam C. Anand, G. S. Brar, Karen Gallo Apr 1983

Research Notes : Screening For Cyst Nematode Resistance In Soybean Breeding, Sam C. Anand, G. S. Brar, Karen Gallo

Soybean Genetics Newsletter

As the soybean cyst nematode (SCN), Heterodera glycines Ichinohe, has become a serious pest of soybeans in the USA, development of resistant culti-vars has received greater attention. This necessitates screening of large numbers of plant progenies to locate SCN-resistant isolates in segregating generations. Ross and Brim (1957) used a double-row method to detect SCN-resistant strains of soybeans.


Soybean Genetics Committee Report, R. I. Buzzell, E. T. Gritton, James H. Orf, T. C. Kilen, H. H. Hadley, R. G. Palmer, C. Newell Apr 1983

Soybean Genetics Committee Report, R. I. Buzzell, E. T. Gritton, James H. Orf, T. C. Kilen, H. H. Hadley, R. G. Palmer, C. Newell

Soybean Genetics Newsletter

No abstract provided.


Research Notes : Resistance Of Soybean Cultivars And Plant Introductions To Damage By Soybean Borer, V. I. Sichkar, O. A. Grikun, V. N. Lobko, V. F. Marj'ushkin Apr 1983

Research Notes : Resistance Of Soybean Cultivars And Plant Introductions To Damage By Soybean Borer, V. I. Sichkar, O. A. Grikun, V. N. Lobko, V. F. Marj'ushkin

Soybean Genetics Newsletter

Due to considerable extending of soybean sowing areas and inculcation of it in new cultivation regions, the losses from diseases and pests are constantly ris1ng. Rich biochemical composition of soybean is an excellent feeding medium for insects and mites, especially its reproductive organs. It is known that more than 500 species of pests parasitize leguminous crops, including more than 90 species of insects and mites.


Research Notes : Genes Y9 And Y11 For Similar Chlorophyll Deficiencies Prove To Be Non-Allelic, R. L. Bernard, Reid G. Palmer, B. P. Giles Apr 1983

Research Notes : Genes Y9 And Y11 For Similar Chlorophyll Deficiencies Prove To Be Non-Allelic, R. L. Bernard, Reid G. Palmer, B. P. Giles

Soybean Genetics Newsletter

T219H and Tl35, two of the more vigorous chlorophyll-deficient types in the Genetic Type Collection, both have distinctly light green foliage through-out their life cycle. They are controlled by different genes since the Tl35 phenotype is caused by a homozygote, y9y9 (Probst, 1950), and the T219H phenotype by a heterozygote, Y11Y11 (Y11Y11 has a bright orange-yellow seedling-lethal phenotype) (Weber and Weiss, 1959). However, because of the similar phenotypes, it has been suggested that y9 and y11 may be multiple alleles at the same locus.


Research Notes : Tactics For Management Of Soybean Of Entomopathogens And Commercial Suppression Of The Silver-Spotted Pest Complexes : Potential Microbial Insecticides For Skipper Soybean Pest, Carolyn B. Brooks Apr 1983

Research Notes : Tactics For Management Of Soybean Of Entomopathogens And Commercial Suppression Of The Silver-Spotted Pest Complexes : Potential Microbial Insecticides For Skipper Soybean Pest, Carolyn B. Brooks

Soybean Genetics Newsletter

The silver-spotted skipper (Epargyreus clarus), having become increasingly more destructive to Maryland Eastern Shore soybeans, is being studied as a candidate for biocontrol. Nordin (1975) described a possible viral pathogen isolated from a decayed skipper. Without a clear knowledge of the micro-flora population of a live insect it is difficult to conclude, from the presence of a microorganism on a dead insect, that a pathogen exists, since numerous species of bacteria multiply rapidly in dead insects.