Department of Horticulture, Oregon State University, 97331, Corvallis, OR, USA.
Theor Appl Genet. 1985 Sep;70(6):687-92. doi: 10.1007/BF00252298.
Nondormant mutants in hazelnut (Corylus avellana L.) are described. In contrast to normal trees in which physiological rest, or dormancy, is induced by short days, mutants fail to respond to this stimulus. Shoot tips continue to grow, old leaves are retained until midwinter when they are frozen and/or pushed off by developing axillary buds, axillary buds begin to grow in December, 2-3 months before normal spring bud break, and cold hardiness does not develop. Nondormancy is controlled by a single recessive gene (dd). The mutation is not uncommon since eight cultivars, including the world's most important commercial cultivars, are heterozygous for this trait. The implications of nondormancy in a temperate tree species are discussed in relation to evolution, extension of the range of cultivation, breeding, and value for basic studies of fundamental mechanisms of dormancy.
榛树（Corylus avellana L.）的非休眠突变体被描述。与正常树木不同，正常树木的生理休眠或休眠是由短日照诱导的，而突变体对这种刺激没有反应。芽尖继续生长，老叶保留到仲冬，然后被发育中的腋芽冻坏和/或推掉，腋芽在 12 月开始生长，比正常的春季芽突破早 2-3 个月，并且不会产生抗寒性。非休眠性由单个隐性基因（dd）控制。由于包括世界上最重要的商业品种在内的八个品种都是这种性状的杂合体，因此这种突变并不罕见。本文讨论了在温带树种中，非休眠性在进化、栽培范围的扩展、繁殖以及休眠基本机制的基础研究方面的意义。
