中国矮生刺黄瓜品系特性的研究初报

STUDIES ON CHARACTERS AND GENETIC EFFECTS OF DETERMINATE CUCUMBER

本文利用由中国蔓生刺黄瓜自然突变产生的矮生型黄瓜为材料,通过多代自交选育及性状观察,初步了解该矮生黄瓜植物学性状除具有自封顶、植株矮化性状外,与蔓生型黄瓜无明显差异。在生物学方面,该矮生黄瓜具有早熟、雌花节率高、结果集中、生长期短等特性。通过对中国矮生刺黄瓜与不同品种蔓生黄瓜杂交后代的观察、分析,初步认为黄瓜植株高度是由单基因体系和多基因体系共同作用决定的。

Seven lines of determinate cucumber were developed from the mutant of trailing cultivar Jinyan No. 1 by selecting for several generations through its successive self-fertilization. Some characters were inves-tigated, all of the lines with early maturity, high rate of female flowers and short growing season,especially the traits of determinate of flowering and dwarf plants were different from the trailing cucumber. Based on the genetic analyses, the height of cucumber were controlled by two genetic systems, the single gene and the polygene system. The former resulted in dwarf or determinate phenotype of cucumber when its recessive genes were in homozygote, dede, whereas dominate genes in homozygote, DeDe, produced trailer type of plant. When the interaction of single genes in heterozygote, Dede, with polygenes, happened the phenotype of height of cucumber was different depended on its genetic background.