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  • Author or Editor: L. H. Pollard x
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Abstract

Measurable differences in length, width, and depth of seeds of bean (Phaseolus vulgaris L.), from normal and flat-podded “rogues” were observed. Selective milling removed more than half of the seeds that would have given rise to flat pods, resulting in faster and easier field roguing in subsequent crops. The method is suitable only for stock seed purification because of the high loss (60 to 90%) of normal seeds.

Open Access

Abstract

The effect of imbibition and drying rates on colyledon cracking in snap beans, Phaseolus vulgaris L., was studied. Six snap bean cultivars, representing various degrees of susceptibility to cotyledon cracking, were compared. Data indicated that differences in the rate of imbibition and drying were not responsible for differences in susceptibility to cotyledon cracking. The crack-resistant ‘Improved Higrade’ and moderately-resistant ‘Earliwax’ imbibed water faster than the crack-susceptible cultivars. Anatomical studies indicated that cracking was more frequent across the cell walls of the cotyledon cells than along the middle lamellae in all cultivars.

Open Access

Abstract

Two species of Zinnia (Z. elegans Jacq. 2n = 24 and 4n = 48; and Z. peruviana (L.) L. 2n = 24) were utilized in a series of crosses in an attempt to develop new types of Zinnia. Embryos were apparently normal and increased in size during the early stages of development, however, during the second week after pollination there was a breakdown of the endosperm cells followed shortly by degeneration of the embryos. By using IAA and embryo culture techniques, mature F1 plants were produced. The F1 hybrids, which resembled Z. elegans more than Z. peruviana, were more vigorous than either parent. They were sterile.

Open Access