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Soybean Genetics Newsletter

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Research Notes : United States : Monosomics From Synaptic Ks Mutant, Halina Skorupska, Reid G. Palmer Apr 1987

Research Notes : United States : Monosomics From Synaptic Ks Mutant, Halina Skorupska, Reid G. Palmer

Soybean Genetics Newsletter

Our study of unknown synaptic mutants attempts to provide more information about genetics of megasporogenesis and microsporogenesis in soybean. This study attempts also to develop aneuploid stocks to be used to establish a genetic map in soybeans. Synaptic mutants are known to produce aneuploid and polyploid plants.


Research Notes : United States : Rapid Screening For Soybean Lines Potentially Capable Of Biparental Inheritance Of Plastid Dna, Joseph L. Corriveau Apr 1987

Research Notes : United States : Rapid Screening For Soybean Lines Potentially Capable Of Biparental Inheritance Of Plastid Dna, Joseph L. Corriveau

Soybean Genetics Newsletter

Introduction: Shortly after the rediscovery of Mendel's work in 1900, Correns (1909) reported the maternal inheritance of a chlorophyll deficiency in Mirabilis jalapa and Baur (1909) described biparental transmission in Pelargonium zonale. Since then, the pattern of plastid transmission has been determined genetically in some 60 species of angiosperms (see Kirk and Tilney-Bassett, 1978; Tilney-Bassett and Abdel-Wahab, 1979, and references therein). Recently, there have been genetic reports that indicate that plastids are inherited maternally in Glycine max (Palmer and Mascia, 1980; Shoemaker et al., 1985).


Research Notes : United States : A Ploidy Variant Regenerated From Embryogenic Tissue Cultures Of Soybean, J. P. Ranch, Reid G. Palmer Apr 1987

Research Notes : United States : A Ploidy Variant Regenerated From Embryogenic Tissue Cultures Of Soybean, J. P. Ranch, Reid G. Palmer

Soybean Genetics Newsletter

Introduction: A potential application of plant cell and tissue culture to plant improvement is likely to be the use of variation generated by passage through cell and tissue culture (somaclonal variation). With the advent of regeneration protocols for soybean (Christianson et al., 1983; Lazzeri et al., 1985; Ranch et al., 1985, 1986; Barwale et al., 1986; Wright et al., 1986), it becomes necessary to document the occurrence and frequency of variant phenotypes in progeny of regenerated plants. We report here preliminary findings on the identification of a chromosomal variant in plants regenerated from embryogenic tissue cultures of soybean.


Research Notes : United States : Superoxide Dismutase (Sod) And Tetrazolium Oxidase (To) Zymograms Observed In Gradient Page Gels And Preliminary Inheritance Data For Type 3 Zymograms, S. Kring, M. B. Gorman Apr 1987

Research Notes : United States : Superoxide Dismutase (Sod) And Tetrazolium Oxidase (To) Zymograms Observed In Gradient Page Gels And Preliminary Inheritance Data For Type 3 Zymograms, S. Kring, M. B. Gorman

Soybean Genetics Newsletter

We tested gradient PAGE gels for their ability to resolve isozymes with a specific SOD (EC 1.15.1.1) stain as well as with a nonspecific TO stain. In particular, we wanted to test gradient gels for use in scoring F2 seeds segregating for the cultivar-specific type 1 and type 3 TO zymogram patterns first reported by Gorman and Kiang (1977). TO electrophoretic bands are caused by any number of enzymes (particularly SOD) that prevent the spontaneous reduction of tetrazolium dyes in the electron-transfer staining systems used to detect dehydrogenases.


Research Notes : Reaction To Low Temperature Of The F1 Crosses And. Their Parental Forms, V. V. Sherepitko, V. I. Sichkar Apr 1987

Research Notes : Reaction To Low Temperature Of The F1 Crosses And. Their Parental Forms, V. V. Sherepitko, V. I. Sichkar

Soybean Genetics Newsletter

Cold-resistant varieties 'Comet' and 'Amurskaya 41' were used as parental forms. They had been crossed with sensitive-to-low-temperature variety 'Gieso'. Germination analysis of parental components was carried out on plants taken at random, and germination of 50 seeds was established.


Research Notes : United States : Chlorophyll-Deficient Mutants In A Genetically Unstable Line Of Soybean, R. W. Groose, Reid G. Palmer, S. M. Blomgren Apr 1987

Research Notes : United States : Chlorophyll-Deficient Mutants In A Genetically Unstable Line Of Soybean, R. W. Groose, Reid G. Palmer, S. M. Blomgren

Soybean Genetics Newsletter

Mutations for chlorophyll deficiency were identified in an experiment designed to -recover new mutations in the Asgrow Mutable line as evidence for transposition of a mobile genetic element. A detailed protocol for the experiment is presented in the preceding research note (Groose and Palmer, 1987). Each of three independent mutations that are described below was discovered in a sandbench test of a different F11 family, each of which had descended from a different F9 plant of the Asgrow Mutable line.


Research Notes : Italy : Light Shock In Soybean Plantlets?, A. M. Olivieri, M. Lucchin, P. Parrini, S. Marchetti, M. Vischi Apr 1987

Research Notes : Italy : Light Shock In Soybean Plantlets?, A. M. Olivieri, M. Lucchin, P. Parrini, S. Marchetti, M. Vischi

Soybean Genetics Newsletter

In a new soybean breeding program, 70 cross combinations were performed between the following varieties: 'Agripro', 'Beeson', 'Caloria', 'Corsoy', 'Extra Early', 'Mikawashima', 'Norman', 'SRF150', 'SRF307 P', 'TXK505', 'TXK.535', 'Vansoy', and 'Wells'. Mother plants were the varieties indicated in Table l; in this table is also reported the number of combinations involv-ing each variety used as female and the number of seeds obtained.


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency Toward : Moisture Stress, B. Kpoghomou, V. T. Sapra, C. Beyl Apr 1987

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

Soybean Genetics Newsletter

Three soybean cultivars, 'Lee-74', 'Wright', and 'RA 401', were subjected to 100% (control), 75%, and 50% of field capacity during vegetative (Vl), flowering (R2), and pod-filling (R4) stages in greenhouse and field studies. Stress applied at R2 significantly reduced the yield in the green-house, while in the field, the maximum reduction was observed when the plants were subjected to stress at R4. Stress during Vl reduced the yield components less than stress applied during R2 or R4 stages in both studies.


Research Notes : Pakistan : Variability For Some Quantitative Traits In Soybean, M. A. Rajput, Ghulam Sarwar, K. H. Tahir Apr 1987

Research Notes : Pakistan : Variability For Some Quantitative Traits In Soybean, M. A. Rajput, Ghulam Sarwar, K. H. Tahir

Soybean Genetics Newsletter

Abstract: Studies on variability in soybean were taken up to work out the magnitude of genetic variability, heritability, and genetic advance among 36 varieties of soybean. Considerable genetic variability was observed for pods per plant, plant height, and grain yield per plant. High heritability and genetic advance were recorded for number of pods per plant and branches per plant. Thus, yield could be considerably improved through intensive selection pressure based on number of pods per plant and branches per plant.


Research Notes : China : Inheritance Of Some Agronomic Characters Of Interspecific Crosses In Soybeans, Guodong Zhang, Jinling Wang, Qingxi Meng Apr 1987

Research Notes : China : Inheritance Of Some Agronomic Characters Of Interspecific Crosses In Soybeans, Guodong Zhang, Jinling Wang, Qingxi Meng

Soybean Genetics Newsletter

An attempt was made to investigate the inheritance, variation, and segregation of some agronomic characters of interspecific crosses in soybean. Effect of backcrossing with cultivated soybeans as recurrent parents was analyzed in order to find out reasonable and effective methods for utilizing wild and semi-wild soybean germplasms. The parents used in this study were Glycine max (L.) Merr. (Dongnong-33, Dongnong 4), G. gracilis Skvortz. (Long 79-4004, Long 79-3407-1) and G. soja Sieb. and Zucc. (Ji-50192).


Research Notes : United States : Inheritance And Derivation Of T218h, Reid G. Palmer Apr 1987

Research Notes : United States : Inheritance And Derivation Of T218h, Reid G. Palmer

Soybean Genetics Newsletter

Genetic type T218M was found in the cultivar 'Illini' in 1952 at Urbana, Illinois. Genetic type T225M was found in the cultivar 'Lincoln' in Iowa before 1955. T218M phenotypically is similar to T225M in that an unstable allele results in a chlorophyll chimera.


Index Of Authors, Soybean Genetics Newsletter Apr 1987

Index Of Authors, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes : United States : Cultivar Identification By Isozyme Analysis, J. Y. H. Doong, Y. T. Kiang Apr 1987

Research Notes : United States : Cultivar Identification By Isozyme Analysis, J. Y. H. Doong, Y. T. Kiang

Soybean Genetics Newsletter

The purpose of this survey is to build a multiple enzyme system which may provide many biochemical characters to fingerprint cultivars. A total of 751 lines and cultivars of Glycine max have been screened for their enzyme zymogram types by using the technique of slab-gel electrophoresis (see Chiang, 1985; Doong, 1986; Gorman, 1983; Gorman and Kiang, 1977, 1978; Kiang and Gorman, 1983, for method). For 367 named cultivars, the zymogram types of eight enzymes and one seed protein (Ti) are listed in Table 1. Except for several cultivars, two of the eight enzymes, ADH and LAP, listed in Table 1 ...


Research Notes : Turkey : Screening Of Some Soybean Varieties For Resistance To Whitefly (Bemisia Tabaci Genn.), H. Halis Arioglu Apr 1987

Research Notes : Turkey : Screening Of Some Soybean Varieties For Resistance To Whitefly (Bemisia Tabaci Genn.), H. Halis Arioglu

Soybean Genetics Newsletter

There are approximately 70,000 hectares soybean planted area in Aegean, Mediterranean, and Southeastern Anatolian regions of Turkey. These regions have the most productive land of Turkey. The main crops in these areas are cotton and wheat.


Research Notes : United States : New Independent Mutation: Msl (Ames 2), Halina Skorupska, Reid G. Palmer Apr 1987

Research Notes : United States : New Independent Mutation: Msl (Ames 2), Halina Skorupska, Reid G. Palmer

Soybean Genetics Newsletter

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


Research Notes : United States : Genetics Of Reaction To Soybean Mosaic Virus (Smv) In Cultivars Exhibiting Differential Reaction To Smv Strains., Glenn R. Buss, Pengyin Chen, Curtis W. Roane, Sue A. Tolin Apr 1987

Research Notes : United States : Genetics Of Reaction To Soybean Mosaic Virus (Smv) In Cultivars Exhibiting Differential Reaction To Smv Strains., Glenn R. Buss, Pengyin Chen, Curtis W. Roane, Sue A. Tolin

Soybean Genetics Newsletter

A series of seven differential strain groups of SMV, labelled Gl to G7, were reported by Cho and Goodman (1979). Buzzell and Tu (1984) added another strain, G7A, and Lim (1985) added an additional strain, Cl4. We have been studying the genetic relationships among the cultivars that define the strain groups. Our intial studies involved the cultivars 'Marshall', 'Kwanggyo', 'York', 'Ogden', and PI 96.983, which differentiate the seven strain groups of Cho and Goodman.


Research Notes : China : Studies On Genetic Variation Of Soybean Agronomic Characters Induced By Seed Irradiation, Zhihong He Apr 1987

Research Notes : China : Studies On Genetic Variation Of Soybean Agronomic Characters Induced By Seed Irradiation, Zhihong He

Soybean Genetics Newsletter

Since the 1950s, there have been a lot of geneticists who studied the genetic variation of the populations derived from irradiated seeds in the world, but only a few who studied the principle of selection for these populations. Some breeders have not only developed new varieties by using irradiation, but also have studied the genetic variation of irradiated popula-tions. However, the populations that they used had been often selected; therefore, it was hard to avoid that the results had been influenced by di-rectional selection effect.


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency Towards : Micronutrients, M. R. Reddy Apr 1987

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

Soybean Genetics Newsletter

A greenhouse study was conducted to evaluate the sensitivity and tolerance of various soybean genotypes to high levels of soil manganese, and to strongly acid soil conditions. Forty-four soybean genotypes in Maturity Groups V, VI, VII, and VIII were evaluated, the soil used for the study was very high in manganese (90 ppm) and strongly acidic (pH 4.8), and was col-lected from Buncombe County, North Carolina. The soil pH levels were pH 4.8 (original soil pH), and pH 6.3.


Research Notes : United States : Pi 153252 Is A True-Breeding Yellow Mutant, Reid G. Palmer, Mary O. Mcferson, Susan M. Yost Apr 1987

Research Notes : United States : Pi 153252 Is A True-Breeding Yellow Mutant, Reid G. Palmer, Mary O. Mcferson, Susan M. Yost

Soybean Genetics Newsletter

We have searched for chromosome interchanges and inversions among progeny of accessions crossed with cultivars of standard chromosome structure. We make the cross-pollinations and examine the F1 plants for fertility/sterility (Delannay et al., 1982; Palmer et al., 1987). If sterility is present, meiocytes are examined to confirm the presence of a chromosome aberration.


Research Notes : China : Alkali-Tolerant Soybean Mutant Obtained By Means Of Irradiation, Peiying Wang Apr 1987

Research Notes : China : Alkali-Tolerant Soybean Mutant Obtained By Means Of Irradiation, Peiying Wang

Soybean Genetics Newsletter

Some soybean mutants have been selected in our soybean mutation breeding program in recent years. They differed from parents (untreated) characterized by early maturity, high yield, good seed quality, and resistance to environmental stress. In the course of the selection, it was found that irradiation had obvious effects of induced variation upon the change of days to maturity and the improvement of the seed quality as well as its morphology.


Research Notes : Performance Of Near-Isogenic Lines Lacking Seed Lipoxygenases, K. Kitamura, A. Kikuchi, K. Harada Apr 1987

Research Notes : Performance Of Near-Isogenic Lines Lacking Seed Lipoxygenases, K. Kitamura, A. Kikuchi, K. Harada

Soybean Genetics Newsletter

Normal soybean seeds contain at least three lipoxygenase isozymes, called L-1, L-2, and L-3. These isozymes are responsible for the generation of objectionable grassy beany and green flavors which build a barrier against the wide utilization of soy protein products. Recently, the three types of mutants lacking L-1 (Hildebrand and Hymowitz, 1981), L-2 (Kitamura, 1984), and L-3 (Kitamura et al., 1983), respectively, were found.


Research Notes : United States : Soybean Amylase Zymograms On Gradient Page Gels, M. B. Gorman, M. P. Yasenchack Apr 1987

Research Notes : United States : Soybean Amylase Zymograms On Gradient Page Gels, M. B. Gorman, M. P. Yasenchack

Soybean Genetics Newsletter

There have been numerous papers dealing with amylase isozymes in soybeans (i.e., Morita and Yagi, 1979; Hildebrand and Hymowitz, 1980; Kiang, 1981; Adams et al., 1981; Mikami et al., 1982). All have reported beta-amylase as the predominant amylase type in most soybean lines and that varietal differences in beta-amylase either for electrophoretic mobility, pl, or enzyme activity were observed. Gorman and Kiang (1978), Hildebrand and Hymowitz (1980), Kiang (1981), and Griffin and Palmer (1986) reported similar results concerning the inheritance of different beta-amylase electrophoretic variants (i.e., variants were the result of five different alleles at the Spl locus).


Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency Towards : Nitrogen Fixation, M. Floyd, S. Mookherji Apr 1987

Research Notes : United States : Evaluation Of Soybean Germplasm For Stress Tolerance And Biological Efficiency Towards : Nitrogen Fixation, M. Floyd, S. Mookherji

Soybean Genetics Newsletter

Sixty-five soybean germplasm lines from maturity groups (MG) IV to VIII were evaluated for their acid (pH 4.4) and Al (6 ppm) tolerances by measur-ing their N2 fixing capabilities with USDA rhizobium strain 110 and mixture of strains 110, 6, and 122. Plants were grown in a growth chamber in nitro-gen-free nutrient solution for 35 days. Plant introductions from MG VI had consistently higher (~100%) relative root length in 6 ppm Al nutrient solu-tion than those lines from other MGs.


Research Notes : United Kingdom : Assessment Of The Behavior Of Perennial Glycine Genotypes In Tissue Culture, M. R. Davey, N. Hammatt Apr 1987

Research Notes : United Kingdom : Assessment Of The Behavior Of Perennial Glycine Genotypes In Tissue Culture, M. R. Davey, N. Hammatt

Soybean Genetics Newsletter

Perennial Glycine species exhibit a number of characteristics of agronomic potential including daylength neutrality, tolerance to heat, drought, cold (Marshall and Broue, 1981) and salinity (Newell and Hymowitz, 1982), and resistance to soybean cyst nematode (Riggs and Hamblen, 1962, 1966), yellow mosaic virus (Singh et al., 1974), powdery mildew (Mignucci and Chamberlain, 1978) and rust (Burdon and Marshall, 1981). Each of these features would be useful if introgressed into the soybean genepool. However, to date, it has only been possible to produce a few sterile hybrids using conventional crossing followed by embryo rescue (see Newell et al., 1987).


Research Notes : Canada : Linkage Tests, R. I. Buzzell, Reid G. Palmer Apr 1987

Research Notes : Canada : Linkage Tests, R. I. Buzzell, Reid G. Palmer

Soybean Genetics Newsletter

Results reported by Buzzell (1974) were not conclusive as to whether or not E3 (daylength response) and Ep (seedcoat peroxidase) are independent or loosely linked. Palmer et al. (1984) has shown that Ep is linked with Frl in linkage group 12. Using F2 plants of 'Minsoy' x 'Hark' previously reported (Palmer et al., 1984) for seedcoat peroxidase and root fluorescence, we tested for linkage of E3 with Ep and Frl by testing F3 material for response under a daylength extended to 20 h with cool white fluorescent light.


Research Notes : United States : Examination Of Wild Perennial Glycine Species For Glyphosate Tolerance, M. M. Loux, R. A. Liebl, T. Hymowitz Apr 1987

Research Notes : United States : Examination Of Wild Perennial Glycine Species For Glyphosate Tolerance, M. M. Loux, R. A. Liebl, T. Hymowitz

Soybean Genetics Newsletter

There has been much recent interest in the development of crops that are tolerant or resistant to the herbicide glyphosate. Glyphosate is a nonselective systemic herbicide that can control many annual and perennial weeds regardless of their size, a characteristic atypical of most selective herbicides used in crop production. Crop tolerance to glyphosate would be beneficial as it would provide growers, for the first time, the opportunity to control almost all weeds with a single herbicide application.


Research Notes : India : Comparative Performance Of Near-Isogenic Lines For Yellow 93 Mosaic Virus Infection In Soybean, Pushpendra, Hari Har Ram Apr 1987

Research Notes : India : Comparative Performance Of Near-Isogenic Lines For Yellow 93 Mosaic Virus Infection In Soybean, Pushpendra, Hari Har Ram

Soybean Genetics Newsletter

The yellow mosaic disease of soybean is a serious disease in the foothills of Uttar Pradesh and other parts in northern India. It is transmitted through white fly (Bemisia tabaci Genn.). Breeding for resistance to yellow mosaic has been one of our breeding objectives (Ram et al., 1985).


Research Notes : United States : Response Of Tolerant And Susceptible Soybean Cultivars To Columbia Lance Nematode, G. C. Weiser, J. D. Mueller, E. R. Shipe Apr 1987

Research Notes : United States : Response Of Tolerant And Susceptible Soybean Cultivars To Columbia Lance Nematode, G. C. Weiser, J. D. Mueller, E. R. Shipe

Soybean Genetics Newsletter

Columbia lance nematode, CLN [Hoplolaimus columbus Sher], is a migratory endo-and ectoparasite of soybean and commonly causes yield reductions of up to 30% in tolerant cultivars. Complete crop failure may occur on moisture-stressed or susceptible cultivars. First recognized as a major parasite of cotton and soybean in 1967 (Fassultiotis et al., 1968), CLN now infests a large portion of the coastal plain of South Carolina, Georgia, and North Carolina. .pdf


Research Notes : Japan : An Interesting Nodulation Response Of Soybean Cultivars To Bradyrhizobium Japonicum Strain S32, S. Sawada, A. Ito, T. Takahashi Apr 1987

Research Notes : Japan : An Interesting Nodulation Response Of Soybean Cultivars To Bradyrhizobium Japonicum Strain S32, S. Sawada, A. Ito, T. Takahashi

Soybean Genetics Newsletter

Slow-growing Bradyrhizobium japonicum strain S32 formed effective nodules on tap and lateral roots of Glycine max cv. 'Kitamusume'. In contrast, strain S32 formed a few large nodules with pink interior and several small nodule-like structures only on the lateral roots of 'Toyosuzu' cultivars. Although acetylene-reduction activity was detected in the nodules of Toyosuzu, the top of the plant showed no response. A color difference between the two cultivars with S32 was observed 25 days after seeding and inoculating.


Research Notes : Turkey : Double-Crop Soybean Production Techniques In Turkey, H. Halis Arioglu Apr 1987

Research Notes : Turkey : Double-Crop Soybean Production Techniques In Turkey, H. Halis Arioglu

Soybean Genetics Newsletter

Turkey is located between 36° and 42° N latitude. Syria, Iraq, and the Mediterranean Sea border Turkey on the south; the Black Sea on the north; Russia and Iran on the east; and the Aegean Sea, Greece and Bulgaria on the west. The country has a total area of 77.9 million hectares. Approximately 36% is cultivated, 26% is pasture and meadow land, and the remaining 38% is forest or unproductive land (Tarimsal Yapi ve Uretim, 1984).