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Iowa State University

Plant Sciences

Soybean Genetics Newsletter

1980

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Research Notes : Performance Of F1 Generation Of Soybean In Relation To Colaspis Sp. And Diabrotica Speciosa, Jorge A.M. Rezende, Manoel A.C. Demiranda Apr 1980

Research Notes : Performance Of F1 Generation Of Soybean In Relation To Colaspis Sp. And Diabrotica Speciosa, Jorge A.M. Rezende, Manoel A.C. Demiranda

Soybean Genetics Newsletter

Resistance against the leaf beetles Colaspis sp. (C.occidentalis or near occidentalis according to Dr. R. White, Insect Identification and Beneficial Insect Introduction Institute, Beltsville, MD, USA) and Diabrotica speciosa (Gennar, 1824) were evaluated under greenhouse conditions, utilizing the resistant PI 227,687, two commercial susceptible varieties 'Santa Rosa' and 'Parana', and the two F1 between the PI and these commercial varieties. A free-choice type of test, with five replications, and artificial infestation of field-collected adults, was made and the percentage of leaf area eaten was visually estimated. Tables 1 and 2 show the percentage of leaf area eaten by ...


Research Notes : Frequency Of Spectrum Of Visible Mutations Induced By Gamma Rays In Soybean, M. F. Haque, U. Choudhary Apr 1980

Research Notes : Frequency Of Spectrum Of Visible Mutations Induced By Gamma Rays In Soybean, M. F. Haque, U. Choudhary

Soybean Genetics Newsletter

Although mutation studies are very common in most of the crop plants, soybean (Glycine max [L.] Merrill.) has received comparatively little attention by the mutation breeders. In view of this, systematic mutation studies were started at Ranchi Agriculture College, Kanke. The present study reports the effect of ganma rays on the frequency and spectrum of visible mutations in soybean. Materials and methods: Seeds of a soybean variety Sepaya Black, brought to uniform moisture content, were irradiated with ganma rays at Fertilizer Corporation of India, Sindri, Dhanbad (Bihar) at a dose of 10 kr, 20 kr, 30 kr, and 40 kr.


Mailing List, Soybean Genetics Newsletter Apr 1980

Mailing List, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Committees Named By Soybean Genetics Committee : National Plant Genetic Resources Board, Soybean Genetics Newsletter Apr 1980

Committees Named By Soybean Genetics Committee : National Plant Genetic Resources Board, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Index Of Authors, Soybean Genetics Newsletter Apr 1980

Index Of Authors, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Announcements : Fourth International Symposium On Nitrogen Fixation, Soybean Genetics Newsletter Apr 1980

Announcements : Fourth International Symposium On Nitrogen Fixation, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : Inheritance Of Insensitivity To Long Daylength, R. I. Buzzell, H. D. Voldeng Apr 1980

Research Notes : Inheritance Of Insensitivity To Long Daylength, R. I. Buzzell, H. D. Voldeng

Soybean Genetics Newsletter

Genetic tests for daylength insensitivity have been run using PI 297,550 reported to be day-neutral by Polson (1972), as source material. Segregating material was grown under long days at various times from 1973 to 1979, either in a growth cabinet (Buzzell et al., 1974) or in a greenhouse with daylength 27 extended to 20 hours with incandescent light. Material was classified at 35 to 42 days after planting as either non-flowering, sensitive (S), or flowering, insensitive (I).


Research Notes : General Ideas About Soybean Genetics, Adel Rashad Al-Ali Apr 1980

Research Notes : General Ideas About Soybean Genetics, Adel Rashad Al-Ali

Soybean Genetics Newsletter

I have seen pubescence, especially in nature plants, in brown color against gray color. The two types are equally frequent among commercial varieties. In brown pubescent genotypes the hairs in the young plants are colorless, but after a few weeks' growth, many of the hairs grow on the stems and pods and to a lesser extent on the leaves with brown pigments.


Research Notes : The Monogenic And Digenic Control Of Hypocotyl And Flower Color In Soybeans, A. M. Olivieri, M. Lucchin, P. Parrini Apr 1980

Research Notes : The Monogenic And Digenic Control Of Hypocotyl And Flower Color In Soybeans, A. M. Olivieri, M. Lucchin, P. Parrini

Soybean Genetics Newsletter

The pigmentation of seedling hypocotyl is important in the knowledge, at a very early stage, of success in the cross of plants differing in this aspect. Several genes, among which are W1, W2, W3, W4 and wm, have been recognized as controlling flower pigmentation, and many studies indicate that flower and hypocotyl colors are closely associated. Hartwig and Hinson (1962) put in evidence that hypocotyl of W1W3W4 genotypes is darker than that of W1w3W4 ones.


Research Notes : Photoperiodic Response Of Wild Soybeans Collected From Localities Of Different Latitude In China, C. L. Wang, C. S. Mon, C. C. Tsu Apr 1980

Research Notes : Photoperiodic Response Of Wild Soybeans Collected From Localities Of Different Latitude In China, C. L. Wang, C. S. Mon, C. C. Tsu

Soybean Genetics Newsletter

In 1963, 16 wild soybeans (Glycine soja Sieb. and Zucc.) and 4 semicultivated soybeans (Glycine max (L . ) Merr.) were collected from localities of different latitude in China (Table 1). They were tested under different photoperiods for their photoperiodic response. The experimental results are shown in Table 2. From the experimental data in Table 2 we can clearly see that wild soybeans collected from Yangtze River Valley (30°18' - 31°54') and south region of China (26°56') are typical short-day plants.


Research Notes : Performance Of Soybeans, Lima Beans, And Corn In Pure And Mixed Culture, J. M. Joshi, Brenda L. Spence Apr 1980

Research Notes : Performance Of Soybeans, Lima Beans, And Corn In Pure And Mixed Culture, J. M. Joshi, Brenda L. Spence

Soybean Genetics Newsletter

One of the main objectives of the National Aeronautics and Space Administration (NASA) is to develop a controlled ecological life support system (CELSS). Such a system is needed to harness solar energy for inhabitants of the earth and to set up manufacturing facilities in space. Before this gigantic step, NASA is interested in evaluating ground-based manned demonstration of CELSS (Mason and Carden, 1979).


Usda Soybean Germplasm Collection, Soybean Genetics Newsletter Apr 1980

Usda Soybean Germplasm Collection, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Report Of The Soybean Genetics Committee, R. L. Bernard, T. E. Devine, E. T. Gritton, Theodore Hymowitz, C. Newell, R. G. Palmer, J. R. Wilcox Apr 1980

Report Of The Soybean Genetics Committee, R. L. Bernard, T. E. Devine, E. T. Gritton, Theodore Hymowitz, C. Newell, R. G. Palmer, J. R. Wilcox

Soybean Genetics Newsletter

No abstract provided.


Front Matter, Soybean Genetics Newsletter Apr 1980

Front Matter, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : Oviposition Of Bemisia Tabaci (Genn.) In F1 Soybean Plants Of Crosses Between Pi 229,358 And Commercial Varieties, A. L. Lourencao, V. A. Yuki Apr 1980

Research Notes : Oviposition Of Bemisia Tabaci (Genn.) In F1 Soybean Plants Of Crosses Between Pi 229,358 And Commercial Varieties, A. L. Lourencao, V. A. Yuki

Soybean Genetics Newsletter

The whitefly Bemisia tabaci is an important vector of virus diseases of cotton, soybean, bean, tomato and other crops. Soybean is a good host for this insect and the increase in the soybean acreage in Brazil has brought an uprise in the whitefly population and whitefly-transmitted viruses. The introduction of resistance against this whitefly in soybean commercial varieties may benefit many crops in Brazil.


Research Notes : Evaluation Of Soybean Germplasm For Aluminum Tolerance, Val T. Sapra, Taddesse Mebrahtu, Luke M. Mugwira Apr 1980

Research Notes : Evaluation Of Soybean Germplasm For Aluminum Tolerance, Val T. Sapra, Taddesse Mebrahtu, Luke M. Mugwira

Soybean Genetics Newsletter

A growth-chamber experiment was conducted in nutrient solution containing 0 or 8 ppm of aluminum as Al2K(S04)3 to study differential Al tolerance of soybean germplasm representing Maturity Groups V, VI and VII, supplied by Dr. E. E. Hartwig. Two soybean cultivars, one sensitive ('Chief') and the other tolerant ('Perry'), were included as standard checks (Fig. 1). Soybean roots were affected by the presence of Al and showed discoloration, stunted and blackish root tips .


Research Notes : Screening The Usda Soybean Germplasm Collections For Lines Lacking The 120,000 Dalton Seed Lectin, R. W. Stahlhut, T. Hymowitz Apr 1980

Research Notes : Screening The Usda Soybean Germplasm Collections For Lines Lacking The 120,000 Dalton Seed Lectin, R. W. Stahlhut, T. Hymowitz

Soybean Genetics Newsletter

Pull et al. (1978b) screened 102 lines of soybeans [Glycine max (L.) Merr.] and found 5 lines lacking the 120,000 dalton seed lectin ('Columbia', 'Norredo', 'Sooty', 'T102', and 'Wilson-5'). The amount of soybean lectin (SBL) per g defatted meal and the amount of SBL content in soybean protein for the 102 lines tested also was published by Pull et al. (1978a). Orf et al. (1978) demonstrated, using polyacrylamide gel electrophoresis, that the presence of SBL is controlled by a single dominant gene designated Le. The homozygous recessive le le results in the lack of SBL.


Research Notes : Inheritance Of Hard Seeds In Soybeans, Peerasak Srinives, Henry H. Hadley Apr 1980

Research Notes : Inheritance Of Hard Seeds In Soybeans, Peerasak Srinives, Henry H. Hadley

Soybean Genetics Newsletter

During the past three years we have studied the inheritance of hard seeds in soybeans. These studies have been supported in part by INTSOY and in part by the Rockefeller Foundation. They were begun with the help of Dr. H. C. Minor and Dr. E. H. Paschal III who had evaluated potential parental material for the hard-seed characteristic and who continued to help through advice, handling plant materials in Puerto Rico, and providing certain facilities.


Research Notes : Increasing Phytophthora-Rot Severity In Field Screening, R. I. Buzzell, A. S. Hamill Apr 1980

Research Notes : Increasing Phytophthora-Rot Severity In Field Screening, R. I. Buzzell, A. S. Hamill

Soybean Genetics Newsletter

Walters and Caviness (1968) reported that phytophthora-susceptible varieties in Arkansas were more prone to the disease than resistant varieties if sprayed with 2,4-DB at flowering time. This increase in disease severity suggests that 2,4-D8 could be used to increase the effectiveness of natural and mass selection (cf. Buzzell and Haas, 1972) for disease resistance/tolerance to Phytophthora megaspenna var. sojae (Pms). A non-replicated observation test was established in a field known to be infested with Pms races 3, 7 and 9 (T. R. Anderson, unpublished results) at the Soils Substation, Woodslee, Ontario.


Research Notes : Changing The Maturity Of Soybean Cultivars Using Ems, David A. Reicosky, James H. Orf Apr 1980

Research Notes : Changing The Maturity Of Soybean Cultivars Using Ems, David A. Reicosky, James H. Orf

Soybean Genetics Newsletter

This study was conducted to determine if the mutagenic agent, ethyl methane sulfonate (EMS), could be used to change the maturity of a soybean line while still maintaining the yielding ability and other morphological characters of the line. Mutants with changes in maturity have been reported in several experiments (Kawai, 1970); however, there are few reports where soybeans have been used in studies of this kind. In the study 1000 seeds of the cultivar 'Williams' were allowed to imbibe water for 16 hours by being soaked in distilled water that was aerated.


Research Notes : Heritability And Correlation Estimates For Protein, Oil, And Crushing Hardness In Photo-Sensitive And Insensitive Groups Of Soybean, V. P. Gupta, D. R. Sood, H. S. Nainawatti, D. S. Wagle Apr 1980

Research Notes : Heritability And Correlation Estimates For Protein, Oil, And Crushing Hardness In Photo-Sensitive And Insensitive Groups Of Soybean, V. P. Gupta, D. R. Sood, H. S. Nainawatti, D. S. Wagle

Soybean Genetics Newsletter

Protein, oil, and crushing hardness as an indicator of cooking quality are the important seed attributes for which soybean is valued in all parts of the world. Protein and oil content have been reported to be influenced by genetic and climatic factors (Chapman et al., 1976; Shorter et al., 1977) but with respect to crushing hardness attribute of soybean seed, information available in the literature is as good as nil. In the present communication, attempts have been made to understand the nature of genetic effect through heritability and other genetic parameters of variability for both photosensitive and insensitive groups of ...


Research Notes : Flowering Of Glycine Max (L.) Merr. With Cotyledonary And Unifoliolate Leaves, S. Shanmugasundaram, M. S. Lee Apr 1980

Research Notes : Flowering Of Glycine Max (L.) Merr. With Cotyledonary And Unifoliolate Leaves, S. Shanmugasundaram, M. S. Lee

Soybean Genetics Newsletter

In 'Biloxi' soybeans the trifoliolate leaves are essential to perceive the photoperiodic inductive conditions and to cause the initiation of flower primordia (Borthwick and Parker, 1935). To respond to photoinduction, some plants have to reach "ripeness to flower" or pass the "juvenile phase" (Lang, 1965). "Juvenile phase" is distinct in some soybean cultivars, such as Acc. G 2120, while in the day-neutral soybean Acc . G 215 it is not clear whether there is a "juvenile phase" (Shanmugasundaram and Tsou, 1978).


Research Notes : Observations Of Polyembryony And Polyploidy In Ms1 And Ms2 Male-Sterile Soybean Populations, G. R. Buss, W. R. Autio Apr 1980

Research Notes : Observations Of Polyembryony And Polyploidy In Ms1 And Ms2 Male-Sterile Soybean Populations, G. R. Buss, W. R. Autio

Soybean Genetics Newsletter

Several reports of polyembryony and polyploidy in the progeny of ms1 male-sterile soybeans have been made. Kenworthy et al. (1973) found 4% of 3485 seeds contained twin seedlings. Three triploids and one haploid were found among the twins.


Research Notes : The Effect Of Added Methionine On The Growth And Protein Composition Of Soybean On Cotyledons, L. P. Holowach, J. T. Madison, R. N. Beachy, J. F. Thompson Apr 1980

Research Notes : The Effect Of Added Methionine On The Growth And Protein Composition Of Soybean On Cotyledons, L. P. Holowach, J. T. Madison, R. N. Beachy, J. F. Thompson

Soybean Genetics Newsletter

Immature soybean cotyledons grow well in aseptic in vitro culture (Ann. Bot. 41: 29, 1977). The effect of adding methionine to a sulfuradequate medium was tested . Methionine caused a dry weight increase of 23%. Methionine also raised the methionine content of the protein by 22% and decreased the arginine content by 11 %.


Research Notes : Underground Pods In Glycine Falcata Benth, S. Shanmugasundaram Apr 1980

Research Notes : Underground Pods In Glycine Falcata Benth, S. Shanmugasundaram

Soybean Genetics Newsletter

The genus Glycine L. has been divided into three sub-genera, namely Glycine L., Bracteata Verde ., and Soja (Moench) F. J. Herm. (Hymowitz, 1970). G.falcata of 1864 was the last of the true Glycine species to be described by Bentham (Hermann, 1962). G. falcata is one of the six species belonging to the sub-genus Glycine L. G.falcata appears to be restricted to Australia (Newell and Hymowitz, 1978).


Research Notes : Evaluation Of Soybean Germplasm Collection For Climatic Conditions In Poland, J. K. Jaranowski, H. Skorupska, L. Torz Apr 1980

Research Notes : Evaluation Of Soybean Germplasm Collection For Climatic Conditions In Poland, J. K. Jaranowski, H. Skorupska, L. Torz

Soybean Genetics Newsletter

In 1974 studies were commenced to evaluate the variation in qualities and traits of soybean. The material covered a collection of 2412 entries including 275 varieties and 2137 genetic lines. The entries representing Maturity Groups (MGs) 00-IV were obtained from the following centers: U.S. Regional Soybean Lab., Urbana, Illinois, USA; Corn Breeding Lab . , Hokkaido, Japan; National Agric. Exp. Sta . , Hitsujigaoka, Sapporo, Japan; Weibullsholm Inst. Branch Sta., Fiskeby, Sweden; Dept. of Crop Science, Univ. of Guelph, Canada and Research Branch Canada Agric. Morden, Manitoba, Canada (41-58° northern latitude)


Research Notes : Rhizobium Japonicum Inoculation On Glycine Max In Vietnam, Chu Huu Tin Apr 1980

Research Notes : Rhizobium Japonicum Inoculation On Glycine Max In Vietnam, Chu Huu Tin

Soybean Genetics Newsletter

Reference has been made to the culture of soybeans (Glycine max [L.] Merrill) in Vietnam by Louriro (1793) and Rumphius (1747) as far back as the eighteenth century. Wild soybean (Glycine laotica) is present in Vietnam, having been collected by Harmand (1877) in the area of Hue and the Bassac River in the 19th century. Kwon (1969) speculated that since the history of Vietnam is related closely with China, there is little doubt that soybeans have been grown for many centuries in this country.


Announcements : Soybean Rust Newsletter, Soybean Genetics Newsletter Apr 1980

Announcements : Soybean Rust Newsletter, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Committees Named By Soybean Genetics Committee : Soybean Germplasm Advisory Committee, Soybean Genetics Newsletter Apr 1980

Committees Named By Soybean Genetics Committee : Soybean Germplasm Advisory Committee, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : Linkage Tests Between The Ap And W1 Loci, J. F. Korczak, D. F. Hildebrand, T. Hymowitz, R. L. Bernard Apr 1980

Research Notes : Linkage Tests Between The Ap And W1 Loci, J. F. Korczak, D. F. Hildebrand, T. Hymowitz, R. L. Bernard

Soybean Genetics Newsletter

The F2 generation of the cross 'Williams' x 'Manchu (Madison)' was used to determine if the Ap and W1 loci were linked. The Ap locus controls a seed acid phosphatase which exists in the germplasm in three different electrophoretic forms controlled by three codominant alleles -- Ap^a, Ap^b and Ap^c (Hildebrand et al., 1980). The W1 locus controls flower color--purple (W1) and white (w1).