新疆扁桃F1群体抗寒性研究

Study on Cold Resistance of Xinjiang Almond F1 Groups

以4种新疆扁桃的自然杂交后代F1群体的一年生休眠枝为材料,测定自然降温过程中休眠枝的电解质渗出率、丙二醛(MDA)含量、脯氨酸(Pro)含量、过氧化氢酶(CAT)的活性、超氧化物歧化酶(SOD)的活性、过氧化物酶(POD)的活性。结果表明:电解质渗出率、丙二醛含量、脯氨酸含量、过氧化氢酶的活性在自然降温过程中均表现为随温度下降而增加随温度回升而减小的变化趋势,而过氧化物酶活性却与采样时期的气温变化趋势相吻合,超氧化物歧化酶活性则呈现出"M"型变化;采用主成份分析法综合评价不同采样期4种新疆扁桃的自然杂交后代F1群体抗寒性,结果为5次采样时间的抗寒性综合评价结果均为S-2>S-1>S-9>S-13。

This experiment with 4 kinds of Xinjiang almond natural hybrids of F1 Groups annual dormant branch materials, remainly determinates the natural cooling process of the dormant branch of the dormant branch of electrolyte leakage, malondialdehyde （ MDA ） content, proline content （ Pro ）, catalase （ CAT ） activity, superoxide dismutase （ SOD ） activity, peroxidase （ the activity of POD ）. The results show that the electrolyte leakage rate, MDA content, proline content, Hydrogen peroxide enzyme activity, the natural cooling process performes with the temperature droping increased with temperature rising decreased, while Hydrogen peroxide enzyme activity coincides with the sampling period temperature trend, superoxide dismutase activity shows＂ M＂ type change, the principal component analysis method in comprehensive evaluation of 4 kinds of Xinjiang almond natural hybrids of F1 groups cold hardiness, the results of the five sampling times cold resistance evaluation are S -2 〉 S - 1 〉 S -9 〉 S - 13.