不同驯化年限野生线叶野豌豆种子特性及幼苗耐寒性

Seed characteristics and seedling's cold tolerance of wild Vicia tenuifolia with different domestication years

采用不同驯化年限线叶野豌豆(Vicia tenuifolia)作为研究对象,分别对其种子特性和幼苗耐寒性变化进行分析。结果表明,随着驯化年代的延长,种子千粒重、硬实率下降,发芽势、发芽率有所提高,同时幼苗也表现出随驯化年代的延长生长变快的趋势。通过综合可溶性蛋白、丙二醛和可溶性糖3个指标的分析可以得出,随着驯化年限的延长,幼苗耐寒性随之下降。各种变化规律表明,驯化可以使野生线叶野豌豆向着人们需求的方向变异。这一研究结果可为野生豆科牧草线叶野豌豆的驯化和培育提供科学依据。

Taking Vicia tenuifolia with different domestication years as objects, their seed characteristics and seedling＇s cold tolerance were analyzed in this study. The results showed that, with the increasing of domestication years, the 1 000 seed-weight and hard seeds rate declined, while seed germination energy, seed germination rate and growth rate of seedling trended to increase. Results of analysis on soluble protein（SP）, malondialdehyde（MDA） and water-soluble sugar（WSS） indicated that, cold tolerance of V. tenuifolia seedling decreased with the increasing of domestication years. So domestication can make mutations of V. tenuifolia go along with the direction of what people need. This study can provide scien- tific foundation for domestication breeding of V. tenuifolia.