The influence of the cytoplasms on ear number expression on the main stalk was studied in the progeny of five inbred lines of corn (Zea mays L.). The F₁, F₂, and both reciprocal backcross generations were grown in two environments. The ears on the main stalk of each plant were visually enumerated using a scale of zero to six ears per plant. The nubbins were classified as a full ear when seed had developed to cover half of the cob and as zero if the cob was not half covered. By the use of Duncan's New Multiple Range Test, it was possible to demonstrate statistical differences between seven reciprocal pairs. On the basis of these comparisons it is suggested that the plant breeder interested in increasing ear number per plant could enhance the possibility for success by screening for beneficial cytoplasmic-genotypic interactions.

In 27 local varieties of bambara groundnut, there was some association between the number of days from sowing to germination, earliness, internode length, petiole length, number of stems per plant, terminal leaf area, shell thickness, number of pods per plant,number of seeds per pod, seed size, and yield of seeds per plant. Fifty-five coefficients show the degree of correlation between 11 agronomic characters. Yield was highly significantly and positively correlated with days to first germination and maturity, number of pods per plant, number of seeds per pod and 100 seeds weight,and negatively correlated with the other characters. Although yield is highly correlated with all 10 characters, earliness in germination and maturity, number of pods per plant, number of seeds per pod, number of stems per plant and

Some growth regulators studied for morphological and yield effects on soybeans [Glycine max (L.) Merr.] have not been studied for chemical compositional effects, particularly under Great Plains conditions. The objective of this study was to compare morphological aud mature seed compositional responses of 11 growth regulators. Eleven growth regulators of various modes of action were applied at two rates to foliage of soybeaus at one-tenth bloom stage to study their effects on plant growth and seed composition. The desired rate of each growth regulator was applied in 1 liter of water containing 0.02% (v/v) polyoxyethylene sorbitol monolaurate as a surfactant per plot. Morphological characteristics responded more than did the chemical constituents, oil and protein, to the growth regulators. Responses were changes in the node number subtending the first pod, number of branches, and number of pods per plant. The antiauxin triiodobenzoic acid reduced plant height, node number, and node number subtending first pod; and increased branching and pod set. None of the growth regulators, however, increased yield when compared to no treatment. Although none of the regulators appeared useful by itself for commercial soybean production, some might have a role under stress conditions or combined with other regulators.