论文部分内容阅读
早熟桃品种和杂种的出苗问题,是桃子育种理论与实践中的一个需待研究解决的课题。H·B·Tukey 在1933年首先进行了桃胚的生长与果实生长和熟期关系的研究,指出果实发育分为三个时期:第一生长期不论成熟早晚都为48天,第二生长期早、中,晚熟品种所需时间各不相同(5—24日),第三生长期所需时间因品种而异。并指出早熟种第二生长期很短,胚正在生长中即进入第三生长期,果实成熟采收时,胚尚未发育完全,故播种不能萌发出
Premature peach varieties and hybrids emergence problems, peach breeding theory and practice of a need to be studied to solve the problem. H · B · Tukey first carried out in 1933 the peach embryo growth and fruit growth and maturity of the relationship that the fruit development is divided into three periods: the first growth period regardless of the maturity of 48 days, the second growth period Early, middle and late varieties vary in time (5-24 days), and the duration of the third growing season varies by breed. And pointed out that the second generation of early maturing species is very short, the embryo is growing into the third growth period, mature fruit harvest, the embryo has not yet fully developed, so the sowing can not germinate