The inheritance of node number and rate of node production in Brussels sprouts.

The total vegetative node number, rate of node production and number of sprouts over 13 mm diameter were recorded for 10 F1 Brussels sprout cultivars and 45 progenies derived by intercrossing and selfing them. Significant differences, resulting from additive gene action, were found between the 10 cultivars and between their progenies for both characters. For total node number there was also evidence of dominant gene action.

The inheritance of partial self-compatibility in Brassica oleracea L. inbreds homozygous for different S-alleles.

In a study of partial self-compatibility in Brassica oleracea, flower number, seeded siliqua and seed production were recorded on self and cross-pollinated inflorescences of 32 progenies obtained by inter-crossing and selfing 8 plants homozygous for the incompatibility alleles S2, S5, S15 and S45.Progeny differences for both self-and out-cross seed production could be largely attributed to G.C.

The inheritance of partial self-compatibility in Brassica oleracea L.: results from a half diallel homozygous for a highly recessive S-allele.

In a study of partial self-compatbility in Brassica oleracea, flower number, seeded siliqua and seed production were recorded on self- and cross-pollinated inflorescences of the progenies of a half diallel between five unrelated inbred plants homozygous for the same recessive S-allele.On cross-pollinated inflorescences significant amounts of additively controlled genetic variation were found for seed set per flowering site and its two components, seeded siliquae per flower and seeds per seeded siliquae. Considerable heterosis and gene interaction were also present and a simple additive dominance model did not fully explain the observed variation.

Identification of (+)-abscisic acid in strawberry leaves.

The acidic ether extract of leaves collected in October from dormant strawberry plants outdoors at Invergowrie inhibited coleoptile growth in germinating wheat embryos. On paper chromatograms developed either with isopropanol: ammonium hydroxide: water (10:1:1) or isopropanol: 1% ammonium hydroxide (4:1), the zones possessing inhibitory activity had Rf's 0.6-0.