Research Notes: Observations and evaluation of G. gracilis and G. soja forms for crossing within the Glycine genus under climatic conditions in Poland

Wild species of cultivated plants are well known to possess a high potential of adaptability manifested by high tolerance to unfavorable environmental conditions and to pathogens. They are often carriers of valuable biochemical properties. To have these properties transmitted to cultivated species would no doubt be advantageous from the point of view of agriculture

Research Notes : Poland : Analysis of variation and relationship between soybean traits in F3 and F4 in two cross combinations

Qualities and traits of soybean are reported to produce a considerable variation under conditions of long-day environment (Jaranowski et al., 1980, 1983). An outline of genetic bases for soybean breeding in a latitude above 50°N calls for establishing the least environment-modified traits and relationships. Materials and methods: This study carries a presentation of relationships and heritability of traits in early hybrid generations (F3-F4) from two cross combinations, i.e., a medium-early semi-determinate line (PI 238920) and a somewhat later maturity semi-determinate line (PI 180517) --cross combination A , in addition to a Japanese cultivar Oyachi No. 2, classified in our conditions to late semi-determinate lines --cross combination B

Research Notes : Osmia rufa L. (Apoidea, Megalichiae) -A potential pollenator in the subgenus Glycine

Studies on the biology of flowering of wild forms of the subgenus Glycine conducted in a controlled environment demonstrated a conspicuous drop-off of chasmogamic flowers within racemes (Skorupska et al., in press). For pollination, a small-sized insect was employed, viz., a wild bee Osmia rufa L. (0. bicornis L.). The selected wild bee of the family Mechali-chidae is described as the garden mason bee (W6jtowski, 1979)

Research Notes : United States : A new mutation at the ms1 locus

Five different populations have been recognized as sources of ms1 alleles. Genetic studies of male-sterile, female-fertile mutations conducted by Palmer et al. (1978) showed that ms1-North Carolina (T260), ms1-Urbana (T266), ms1-Tonica (T267), and ms1-Ames (T268) are independent mutations at the ms1 locus. Yee and Jian (1983) reported another mutation at the ms1 locus, designated Shennong Male-Sterile Soybean L-78-387

Research notes: Soybean research and breeding in Poland

Soybean has been subjected to research and breeding in Poland for dozens of years . Despite development of native varieties, soybean has not yet been cultivated on a large scale. The evergrowing demand for commercial protein intensified interest in this plant

Research Notes : Evaluation of soybean germplasm collection for climatic conditions in Poland

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: Screening the USDA soybean gennplasm collection for Sp1 variants.

Orf and Hymowitz (1976) using polyacrylamide gel electrophoresis revealed that the seed protein band called A by Larsen and Caldwell (1968) occurs at Rf 0.36 and the seed protein band called B occurs at Rf 0.42 (Rf= mobility relative to a bromophenol blue dye front in a 10% polyacrylamide gel anodic system using a pH 8.3 Tris-glycine buffer). The inheritance of these proteins (although the proteins were not characterized) was reported as being controlled by two codominant alleles at a single locus (Larsen and Caldwell, 1968). Orf and Hymowitz (1976) proposed the gene symbols Sp1a and Sp1b for the electrophoretic forms that occur at Rf 0.36 and Rf 0.42, respectively

Phase coexistence of multiple copper oxides on AgCu catalysts during ethylene epoxidation

Alloy catalysts under reaction conditions are complex entities. In oxidizing atmospheres, multiple phases can coexist on a catalyst s surface as a result of phase segregation and preferential oxidation. Such a scenario can result in unusual substoichiometric and metastable phases that could play important roles in catalytic processes. For instance, AgCu alloys known to exhibit enhanced epoxide selectivity in partial oxidation of ethylene form an oxide like surface structure under reaction conditions. Under these conditions, copper oxides are stable, while silver oxides are not. Consequently, copper segregates to the alloy s surface and forms an oxide overlayer. Little is known about the structure or function of such overlayers, and it is unknown whether they play an active role in the catalyst s enhanced selectivity. In order to develop a clearer picture of such catalysts, the current work utilizes several in situ spectroscopic and microscopic techniques to examine the copper oxide phases that form when AgCu is exposed to epoxidation conditions. It is found that several forms of oxidic Cu coexist simultaneously on the active catalyst s surface, namely, CuO, Cu2O, and some previously unreported form of oxidized Cu, referred to here as CuxOy. Online product analysis, performed during the in situ spectroscopic measurements, shows that increased epoxide selectivity is correlated with the presence of mixed copper oxidation states and the presence of the CuxOy species. These results support previous theoretical predictions that oxidic copper overlayers on silver play an active role in epoxidation. These results furthermore emphasize the need for in situ spectromicroscopic methods to understand the complexity of alloy catalyst

Quorum Sensing Primes the Oxidative Stress Response in the Insect Endosymbiont, Sodalis glossinidius

quorum sensing system relies on the function of two regulatory proteins; SogI (a LuxI homolog) synthesizes a signaling molecule, characterized as N-(3-oxohexanoyl) homoserine lactone (OHHL), and SogR1 (a LuxR homolog) interacts with OHHL to modulate transcription of specific target genes. and SOPE. and SOPE indicates the potential for neofunctionalization to occur during the process of genome degeneration