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中国农学通报 ›› 2024, Vol. 40 ›› Issue (5): 122-126.doi: 10.11924/j.issn.1000-6850.casb2023-0172

• 畜牧·动物医学·蚕·蜂 • 上一篇    下一篇

苜蓿抗寒突变体生理生化及性状指标分析

李如来1(), 冯鹏1(), 郑海燕1, 牛忠林1, 靳晓春1, 吴丽丽1, 蒋佰福1, 姜雪琪2   

  1. 1 黑龙江省农业科学院佳木斯分院/三江平原主要作物育种栽培重点实验室,黑龙江佳木斯 154007
    2 佳木斯市第九中学,黑龙江佳木斯 154007
  • 收稿日期:2023-03-03 修回日期:2023-06-15 出版日期:2024-02-01 发布日期:2024-02-01
  • 通讯作者:
    冯鹏,男,1980年出生,内蒙古乌兰察布人,研究员,博士研究生。通信地址:154007 黑龙江省佳木斯市东风区安庆街531号 黑龙江省农业科学院佳木斯分院,E-mail:
  • 作者简介:

    李如来,男,1987年出生,助理研究员,硕士,研究方向:牧草育种。通信地址:154007 黑龙江省佳木斯市东风区安庆街531号 黑龙江省农业科学院佳木斯分院,E-mail:

  • 基金资助:
    黑龙江省自然科学基金项目“苜蓿诱变抗寒突变体lm1609遗传特性分析及基因定位”(LH2019C061)

Alfalfa Cold-resistant Mutant: Analysis of Physiological and Biochemical Characteristics

LI Rulai1(), FENG Peng1(), ZHENG Haiyan1, NIU Zhonglin1, JIN Xiaochun1, WU Lili1, JIANG Baifu1, JIANG Xueqi2   

  1. 1 Jiamusi Branch of Heilongjiang Academy of Agricultural Sciences/Key Laboratory of Main Crop Breeding and Cultivation in Sanjiang Plain, Jiamusi, Heilongjiang 154007
    2 Jiamusi No. 9 Middle School, Jiamusi, Heilongjiang 154007
  • Received:2023-03-03 Revised:2023-06-15 Published-:2024-02-01 Online:2024-02-01

摘要:

为选育在黑龙江省可越冬的理想紫花苜蓿品种。以‘龙牧806’零磁空间诱变处理后二代群体中获得的lm1609、lm1625、lm1704三个抗寒突变体为实验材料,通过测定发芽指标、越冬率、产量特性指标及根系生理生化指标,进行抗寒性能鉴定。3个突变体发芽指数与对照差异不显著;发芽势、简化活力指数lm1609显著高于lm1625、lm1704,分别为82.05%、469.82 (P<0.05);3个突变体的越冬率都显著低于对照组;突变体和对照6月6日起始株高差异不显著,随着植株生长,7月6日和8月6日lm1609、lm1704显著高于lm1625和对照;突变体lm1609、lm1625、lm1704三者鲜草产量差异不显著,但显著高于对照(P<0.05);三个苜蓿突变体植株根系过氧化物酶、超氧化物歧化酶均显著高于对照,并且突变体lm1609 POD、SOD最高,分别达到304.85 OD470/(min·g)、208.41 U/g (P<0.05)。lm1609突变体具有较高的抗寒特性及产量特性,是为理想的抗寒突变体材料。

关键词: 零磁空间, 紫花苜蓿, 诱变突变体, 抗寒性

Abstract:

The aim of this study was to select an ideal alfalfa variety that could overwinter in Heilongjiang Province. Three cold-resistant mutants, lm1609, lm1625 and lm1704, were obtained from the second-generation population of ‘Longmu 806’ after magnetic field free space treatment, and their cold-resistant performance was identified by measuring germination index, wintering rate, yield characteristic index and root physiological and biochemical index. There was no significant difference in germination index between the three mutants and the control. The germination potential and simplified activity index of lm1609 were significantly higher than those of lm1625 and lm1704 (82.05% and 469.82, respectively) (P<0.05). The overwintering rate of the three mutants was significantly lower than that of the control group. There was no significant difference in plant height between mutants and control on June 6. With plant growth, lm1609 and lm1704 on July 6 and August 6 were significantly higher than those of lm1625 and control. The difference in fresh grass yield among the mutants lm1609, lm1625 and lm1704 was not significant, but significantly higher than that of the control (P<0.05). The root peroxidase and superoxide dismutase of the three alfalfa mutants were significantly higher than those of the control, and the highest POD and SOD of the mutants were 304.85 OD470/(min·g) and 208.41 U/g, respectively (P<0.05). lm1609 mutant was an ideal cold resistant mutant material that has high cold resistance and yield characteristics.

Key words: magnetic field free space, alfalfa, mutagenic mutant, cold resistant