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园艺学报 ›› 2012, Vol. 39 ›› Issue (11): 2175-2181.

• 蔬菜 • 上一篇    下一篇

芥蓝部分初级三体的选育及细胞学研究

罗双霞, 申二巧, 张成合, 申书兴   

  1. (河北农业大学园艺学院,河北保定071001)
  • 出版日期:2012-11-25 发布日期:2012-11-25

Generation and Cytological Research of Four Primary Trisomics in Chinese Kale(Brassica alboglabra L. H. Bailey)

LUO  Shuang-Xia, SHEN  二Qiao, ZHANG  Cheng-He, SHEN  Shu-Xing   

  1. (College of Horticulture,Agricultural University of Hebei,Baoding,Heibei 071001,China)
  • Online:2012-11-25 Published:2012-11-25

摘要: 初级三体是用于基因染色体定位的基础材料。以芥蓝自交系‘9501’为试材,采用根尖细胞染色体计数法,从其三倍体与二倍体回交子代中筛选出了34个2n + 1植株,利用无性快繁技术建成可持续利用的单株试管无性系,经核型分析从中初步获得了4个初级三体(1号初级三体,6号初级三体,8号初级三体和随体—初级三体)。各初级三体在株高、株形、叶形等形态特征上表现出一定差异,在减数分裂终变期均以8Ⅱ + 1Ⅲ的联会方式为主,后期Ⅰ染色体呈9/10分离的占绝大多数,额外染色体通过雌配子的传递率为10.15% ~ 27.63%,通过雄配子的传递率为4.91% ~ 11.86%。

关键词: 芥蓝, 初级三体, 核型分析

Abstract: Primary trisomics are important materials for gene assignment. Chinese kale(Brassica alboglabra L. H. Bailey)inbred line‘9501’was used as material,by root tip cell chromosome number examination,34 plants with a extra chromosome(2n + 1 = 19)were selected from the progenies of triploid(2n = 3x = 27)back-crossing with diploid parent(2n = 2x = 18);via propagation in vitro and karyotype analysis,four primary trisomics(Tri-1,Tri-6,Tri-8 and Tri-SAT)were obtained from the 2n + 1 plants. Each trisomic showed some special characters in morphological traits,and mainly formed 8 bivalents and 1 trivalent(8Ⅱ+ 1Ⅲ)at meiotic diakinesis,and most cells got 9 chromosomes in a pole and 10 chromosomes in another pole(9/10)at meiotic anaphaseⅠ. The extra chromosomes of the four trisomics can transmit through female and male gametes,and the transmission rates ranged from 10.15% to 27.63% for female and 4.91% to 11.86% for male.

Key words: Chinese kale, Brassica alboglabra L. H. Bailey, trisomics, karyotype analysis

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