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Iowa State University

Plant Sciences

Soybean Genetics Newsletter

1975

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Research Notes: U.S. Regional Soybean Laboratory, Usda-Ars, University Of Illinois, Urbana-Champaign, And Agriculture Canada, R. L. Bernard, R. I. Buzzel Apr 1975

Research Notes: U.S. Regional Soybean Laboratory, Usda-Ars, University Of Illinois, Urbana-Champaign, And Agriculture Canada, R. L. Bernard, R. I. Buzzel

Soybean Genetics Newsletter

Bernard (1971) reported on two major genes, E1 and E2, that affect the time of flowering and maturity of soybeans. Buzzell (1971) reported another maturity gene, E3; the recessive allele did not respond to fluorescent-daylength treatment. Kilen and Hartwig (1971) reported a recessive gene for a similar character in southern varieties.


Index Of Contributors, Soybean Genetics Newsletter Apr 1975

Index Of Contributors, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes: Agriculture Canada, R. I. Buzzell, J. H. Haas Apr 1975

Research Notes: Agriculture Canada, R. I. Buzzell, J. H. Haas

Soybean Genetics Newsletter

Powdery mildew was introduced into a Station greenhouse in 1968, apparently with seed of Glycine falcata (PI 246.591). This accession was very susceptible; there was abundant conidia production. The mildew spread to G.max and, before control measures could be instituted, varietal differences in resistance and susceptibility were observed.


Research Notes: International Soybean Program (Intsoy), University Of Illinois, Urbana-Champaign, And U.S. Regional Soybean Laboratory, Usda-Ars, C. R. Nissly, R. L. Bernard, C. N. Hittle Apr 1975

Research Notes: International Soybean Program (Intsoy), University Of Illinois, Urbana-Champaign, And U.S. Regional Soybean Laboratory, Usda-Ars, C. R. Nissly, R. L. Bernard, C. N. Hittle

Soybean Genetics Newsletter

All available soybean genotypes of Maturity Group III (515 lines) from the USDA soybean germplasm collection were evaluated for degree of daylength sensitivity at Urbana, Illinois, during the summer of 1973. Each genotype (planted May 19) was grown in four-plant hills, spaced 24 x 40 inches, under both natural daylength and natural daylength extended by 5 hrs incandescent lighting. The incandescent lights were placed 5 feet above ground surface and provided illumination during the night period in the intensity range of 5 to 10 ft-c (50 to 100 lux).


Research Notes: G. B. Pant University Of Agriculture And Technology, A. B. Patil, B. B. Singh Apr 1975

Research Notes: G. B. Pant University Of Agriculture And Technology, A. B. Patil, B. B. Singh

Soybean Genetics Newsletter

Singh et al. (1974) reported the inheritance as well as the pollen behaviour of 3 male-sterile lines of soybean , viz: 'Semmes M.S.1' , 'Semmes M.S.2' and 'N 69-2774'. They observed monogenic inheritance with sterility being the recessive trait in all these lines. Semmes M.S.1 had nonfunctional pollen but of the same size as that of normal pollen grains; Semmes M.S.2 had no pollen at all, whereas N 69-2774 had nonfunctional pollen but these were much bigger as compared to the normal pollen grains.


Research Activities, Soybean Genetics Newsletter Apr 1975

Research Activities, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes: Iowa State University, Ames, And United States Department Of Agriculture, Reid G. Palmer, Marc C. Albertsen, Carol L. Winger, Monica Sheridan, Reid Palmer Apr 1975

Research Notes: Iowa State University, Ames, And United States Department Of Agriculture, Reid G. Palmer, Marc C. Albertsen, Carol L. Winger, Monica Sheridan, Reid Palmer

Soybean Genetics Newsletter

The male-sterile (female-fertile) mutant ms1 is identified by three characteristic features. Kenworthy et al. (1973) reported occurrence of twin seedlings, at a low frequency. We are reporting the two additional characteristics: failure of cytokinesis following telophase II; and production of twice as many pollen mother cells as are found in male-fertile sibs.


Research Notes: Kasetsart University, Sumin Smutkupt Apr 1975

Research Notes: Kasetsart University, Sumin Smutkupt

Soybean Genetics Newsletter

Some mutants and mutation-derived lines of 'S.J.2' and 'Sansai' soybean varieties were obtained after seed irradiation with gamma rays (Smutkupt, 1973; Smutkupt and Gypmantasiri, 1974). Among .them, three of S.J.2 lines, three of Sansai lines, including each control and one 'S.J.l' line (see Table 1) were selected to evaluate for seed yield, protein, oil, fatty acid composition, and other characteristics. Certain plant characteristics of these selected lines are shown in Table 1.


Research Notes: U.S. Regional Soybean Laboratory, Usda-Ars, University Of Illinois, Urbana-Champaign, And University Of Georgia, R. L. Cooper, H. R. Boerma Apr 1975

Research Notes: U.S. Regional Soybean Laboratory, Usda-Ars, University Of Illinois, Urbana-Champaign, And University Of Georgia, R. L. Cooper, H. R. Boerma

Soybean Genetics Newsletter

Segregation for male sterility was observed in an F3 row from the cross of L67-533 (Clark-S, short internode) x SRF300 at Urbana, Illinois in 1971. The observed segregation was 63 fertile: 21 sterile (expected 63:21, 50 assuming sterility controlled by a single recessive gene). This hypothesis was confirmed in 1972, when, totaled over 49 segregating rows, the observed segregation was 1,551 fertile : 528 sterile plants (expected 1,559:520) .


Mailing List, Soybean Genetics Newsletter Apr 1975

Mailing List, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Genetic Stocks Available, Soybean Genetics Newsletter Apr 1975

Genetic Stocks Available, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes: University Of Illinois, T. Hymowitz, C. A. Newell Apr 1975

Research Notes: University Of Illinois, T. Hymowitz, C. A. Newell

Soybean Genetics Newsletter

A soybean germplasm data bank has been set up by members of the Department of Agronomy at the University of Illinois, Urbana-Champaign . Information on named soybean varieties, Plant Introductions, Genetic Type Collection lines, Forage Collection varieties, and species collections, has been compiled and computerized so that it is readily available as a reference source. An information retrieval system enables queries concerning various aspects of the germplasm bank to be answered with a minimum of human effort .


Research Notes: United States Department Of Agriculture And Mississippi Experiment Station, Edgar E. Hartwig Apr 1975

Research Notes: United States Department Of Agriculture And Mississippi Experiment Station, Edgar E. Hartwig

Soybean Genetics Newsletter

Extending number of days to first bloom is a positive means for increasing total growth for short-season, determinate growth habit soybeans . Increasing number of days to first bloom is also effective in increasing the height of lowest pods. In an attempt to develop productive strains of Group IV maturity with good quality seed, we used PI 171.450 as a parent.


Report Of Soybean Genetics Committee, R. L. Bernard, R. I. Buzzel, R. L. Cooper, H. H. Hadley, E. E. Hartwig, K. Hinson, R. G. Palmer Apr 1975

Report Of Soybean Genetics Committee, R. L. Bernard, R. I. Buzzel, R. L. Cooper, H. H. Hadley, E. E. Hartwig, K. Hinson, R. G. Palmer

Soybean Genetics Newsletter

No abstract provided.


Announcement, Soybean Genetics Newsletter Apr 1975

Announcement, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes: University Of Maryland, Eastern Shore, J. M. Joshi, J. G. Wutoh Apr 1975

Research Notes: University Of Maryland, Eastern Shore, J. M. Joshi, J. G. Wutoh

Soybean Genetics Newsletter

In screening experiments** to determine resistance of several commercial as well as introduced soybean germplasms, it was observed that European corn borer (Ostrinia nubilalis - Hbn), which is a major pest of sweet and field corn, was also infesting soybeans towards the end of the growing season in 1974. Generally the soybeans which were planted late (later than first week of June) were damaged. The larvae were found to bore into the stem, creating tunnels which consequently rendered the stem very brittle.


Research Notes: Asian Vegetable Research And Development Center, S. Shanmugasundaram Apr 1975

Research Notes: Asian Vegetable Research And Development Center, S. Shanmugasundaram

Soybean Genetics Newsletter

In 1971, the Asian Vegetable Research and Development Center (AVRDC) was created as an international research organization responsible for improving the production and nutritional qua lity of vegetable crops in the humid tropics. The Center is located to the north of Tainan City in southern Taiwan (between 23°07'07'' and 23°06'36" north latitude, and between 120°16'45'' and 120°17'28'' east longitude at an elevation of nine meters AMSL). In March 1973, AVRDC selected the soybean as one of the six crops to receive initial emphasis in its research program.


Recent Soybean Genetics And Breeding Publications, Soybean Genetics Newsletter Apr 1975

Recent Soybean Genetics And Breeding Publications, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.


Research Notes: University Of Wisconsin, W. D. Beversdorf, S. L. Kimball, E. T. Bingham, G. L. Cutter Apr 1975

Research Notes: University Of Wisconsin, W. D. Beversdorf, S. L. Kimball, E. T. Bingham, G. L. Cutter

Soybean Genetics Newsletter

Regeneration of whole plants from cell cultures has been a primary objective . Several cultivars cultured in a liquid medium (Miller, 1965) with 0.5 mg/liter IAA and kinetin and 1.0 mg/liter 2, 4-D have developed compact spherical structures , 0. 5 to 2.0 mm in diameter, composed of vascular elements enclosed in a compact sheath of parenchyma cells. These structures readily develop roots but not shoots. Altered levels and combinations of plant growth regulators have not promoted shoot differentiation in these cultures .


Research Notes: U.S. Regional Soybean Laboratory And University Of Illinois, Urbana-Champaign, R. L. Bernard, C. R. Cremeens, M. W. Rode, L. M. Wax Apr 1975

Research Notes: U.S. Regional Soybean Laboratory And University Of Illinois, Urbana-Champaign, R. L. Bernard, C. R. Cremeens, M. W. Rode, L. M. Wax

Soybean Genetics Newsletter

Chief', a very tall Maturity Group IV variety, was used as a donor parent in backcrossing to 'Clark' to transfer Np (a gene for high phosphorus tolerance). In the field in 1963, I grew progenies from 40 selected Np F2 plants from Clark BC5 and was surprised to see 2 of the progenies uniformly very tall and 3 of them segregating approximately 1/4 tall plants. The Np gene appears to have no effect on field-grown plants in normal soils.


Foreword, Soybean Genetics Newsletter Apr 1975

Foreword, Soybean Genetics Newsletter

Soybean Genetics Newsletter

No abstract provided.