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植物研究 ›› 2021, Vol. 41 ›› Issue (4): 540-546.doi: 10.7525/j.issn.1673-5102.2021.04.009

• 研究报告 • 上一篇    

航天诱变白桦生长性状分析

马庆, 李芳蕊, 刘桂丰, 李慧玉   

  1. 东北林业大学林木遗传育种国家重点实验室,哈尔滨 150040
  • 收稿日期:2020-10-08 出版日期:2021-07-20 发布日期:2021-03-24
  • 通讯作者: 李慧玉
  • 作者简介:马庆(1996—),男,硕士研究生,主要从事林木遗传育种的研究。
  • 基金资助:
    国家重点研发课题 桦树高效培育技术研究(2017YFD0600603)

Analysis on the Growth Characters of Betula platyphylla in the Aerospace Mutation

Qing MA, Fang-Rui LI, Gui-Feng LIU, Hui-Yu LI   

  1. Northeast Forestry University State Key Laboratory of Forest Tree Genetics and Breeding,Harbin 150040
  • Received:2020-10-08 Online:2021-07-20 Published:2021-03-24
  • Contact: Hui-Yu LI
  • About author:MA Qing(1996—),male,master’s degree student,Mainly engaged in the research of forest genetics and breeding
  • Supported by:
    National Key Research and Development Project(2017YFD0600603);High-efficiency birch cultivation technology research

摘要:

对15年生白桦航天搭载家系(HT-1、HT-2、HT-3、HT-4)及地面对照(CK-1、CK-2、CK-3、CK-4)的生长性状进行分析,并利用2年生、5年生及15年生的生长性状拟合生长曲线。结果表明:15年生HT-1和HT-4的树高分别与地面对照家系间差异达到了极显著水平和显著水平。其中,HT-1树高高于地面对照,而HT-4树高则低于地面对照。其余2个航天搭载家系的树高也高于对照家系,但未达到显著水平。随树龄的增长,航天搭载家系与地面对照的部分性状由差异显著变为差异不显著,但整体差异趋势依旧与苗期保持一致。航天搭载白桦家系及地面对照重复力除98-3家系外都属于高重复力水准(>0.5),HT-1树高性状的突变增益最高,为7.31%。以xˉ+S为标准在HT-1内选择了4株优良单株,最优单株树高比地面对照家系提高了35.29%。通过拟合树高生长曲线预测了树高生长的趋势。

关键词: 白桦, 航天育种, 生长性状, 方程拟合

Abstract:

The growth characters of 15-year-old Space Mutation families of Betula platyphylla(HT-1, HT-2, HT-3, HT-4) and ground controls(CK-1, CK-2, CK-3, CK-4) were analyzed, and the growth characters of 2-year-old, 5-year-old and 15-year-old B. platyphylla were used to fit the growth curve. The results showed that the heights of 15-year-old HT-1 and HT-4 were significantly different from the ground control, respectively. The HT-1 height was higher than the ground control, while the HT-4 height was lower than the ground control. The heights of the other two families after Space mutagenesis were also higher than those of the control, but did not show a significant level. With the growing, some characters of the Space mutagenesis Birch families compared to the ground controls changed from significant differences to nonsignificant differences, but the overall trend of differences remained consistent with the seedling stage. The value of repeatabilities of the Space mutagenesis families and ground controls were high(>0.5), except the 98-3 family. The favorable mutation on height trait of the HT-1 was the highest, which was 7.31%. Using xˉ+S as the standard, 4 excellent individual plants were selected from HT-1, and the optimal individual height increased by 35.29% compared to the ground control family. The growth trend of tree height was predicted by fitting the tree height growth curve.

Key words: Betula platyphylla, aerospace mutation breeding, growth characters, equation fitting

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