核桃为异花授粉树种,由于长期天然杂交和人工栽培世代种子繁殖,其后代多为异交系,变异很大,形成了多样化品种类型,但种的变异,给选优研究提供了有利条件,通过选种,提高了良种研究的有效途径。 新疆核桃的早实、丰产、优质的特性,在国内各地曾享有盛誉。特别是阿克苏的早实核桃,更为人们所重视。 一、早实核桃的发现 Walnut is cross-pollinated tree species, because of long-term natural hybrid and artificial generation of seed breeding, mostly offspring of offspring, the variation is large, the formation of a variety of varieties, but species variation, to provide favorable conditions for the research , Through the selection of seeds, improve the effective way of research. Xinjiang walnut early real, high yield, high-quality features, have enjoyed prestigious throughout the country. Especially Aksu’s premature walnut, more people attach importance. First, the discovery of premature walnut