By Soybean Genetics Newsletter, Published on 04/01/86
By Soybean Genetics Newsletter, Published on 04/01/86
By Soybean Genetics Newsletter, Published on 04/01/86
By Soybean Genetics Newsletter, Published on 04/01/86
By Soybean Genetics Newsletter, Published on 04/01/86
By Soybean Genetics Newsletter, Published on 04/01/86
By Soybean Genetics Newsletter, Published on 04/01/86
By R. L. Bernard, W. D. Beversdorf, R. I. Buzzell, et al., Published on 04/01/86
By Soybean Genetics Newsletter, Published on 04/01/86
By Soybean Genetics Newsletter, Published on 04/01/85
By Soybean Genetics Newsletter, Published on 04/01/85
Zambia was perhaps the first country to initiate research on the development of promiscuous soybean varieties. Promiscuous soybean varieties have the capability of producing effective nodules with the indigenous rhizobia found in the Zambian soils. Two such varieties, 'Magoye
The major storage protein of llS class of soybean seeds, glycinin, has a complex subunit structure. Each of the six subunits is composed of two pro-tein molecules (acidic and basic), linked via disulphide bonds (Badley et al., 1975). Depending on subunit, the acidic moiety molecular weight varies from 37,000 to 42,000, with one exception (m.w. 10,000).
A single recessive gene designated Jn by Bernard and Weiss (1972) controls the inheritance of the lanceolate trifoliolate in soybean. They state that the narrow-leaf condition is associated with a high number of four-seeded pods, which they attributed to a pleiotropic effect of the Jn gene. No yield differences have been found between narrow and normal leaf types using isolines.
Before hybrid soybeans can become a reality, two requirements should be satisfied: (i) an economical large-scale method of producing hybrid seed must be found, and (ii) heterosis for yield must exist. With the findings of genetic male sterility in soybeans (Brim and Young, 1971) interest has devel-oped in the potential productivity of hybrid soybeans. A method for produc-ing...
Soybean breeders and geneticists may be interested in a soybean popula-tion that we constructed and recently released on 1 February 1985. This popu-lation, called 'SGl', originated from 156 parental matings and has been random-mated for three generations. SGl segregates for male-fertile (MF) and male-sterile (MS) plants due to the presence of the ms2 gene (genetic male sterility...
Iron-deficiency chlorosis in soybean is a persistent problem on calcare-ous soils of the upper Midwest. Substantial genetic variability for tolerance to iron-deficiency chlorosis has been found among popular varieties and in the germplasm collection. Due to significant breeding efforts, high-yielding varieties that are tolerant to iron-deficiency chlorosis are now available.
There are few studies on inheritance and behavior of nucleoli in soybean. Yamaha and Sinoto (1925) reported the behavior of nucleoli in somatic mitosis of 30 species of higher plants including Glycine max [Soja]. Palmer and Heer (1976) observed one large nucleolus and six small nucleoli in a 40-chromosome plant from the st4 st4 synaptic mutant. Folsom and Peterson (1984), in...
In the preceding article, we described several nonfluorescent root lines that had been obtained from induced mutagenesis. Seeds of the cultivar 'Williams
Delannay and Palmer (1982) reported four nonallelic mutants, three re-cessive and one dominant, that controlled root fluorescence in soybean. It was during this investigation that we became interested in looking for mutagen-induced nonfluorescent mutants. In the fall of 1980, we wrote to various soybean researchers who were engaged in mutagenesis programs.
Based upon morphology, geographical distribution, isozyme studies and meiotic chromosome behavior in intra-and interspecific hybrids, we tentatively have assigned the following diploid (2n=40) genome designations to species in the genus Glycine.
One of the many characteristics that makes soybeans a desirable crop is their ability to fix nitrogen. In order to enhance this ability, it is ne-cessary to look at the variation among various cultivars throughout their life cycle. Genetic studies for Spanish clover (Desmodium sandwicense E. Mey) by Pinchbeck et al. (1980) showed a significant difference among genotypes in their...
In 1974, ten white-flowered soybean mutants and other different forms were obtained from approximately 6,894 M2 plants of purple-flowered soybean cultivar 'Wakashirna