引用本文
  • 罗双霞.埃塞俄比亚芥与芥蓝杂交获得异源三倍体及其细胞学研究[J].植物遗传资源学报,2013,14(2):361-366.    [点击复制]
  • luoshuangxia.Synthesis and cytological studies of allotriploid interspecies between Brassica carinata and Chinese kale[J].植物遗传资源学报,2013,14(2):361-366.   [点击复制]
【打印本页】 【在线阅读全文】【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 1159次   下载 19623 本文二维码信息
码上扫一扫!
埃塞俄比亚芥与芥蓝杂交获得异源三倍体及其细胞学研究
罗双霞
0
(河北农业大学园艺学院)
摘要:
以埃塞俄比亚芥(2n=4x=BBCC=34)和芥蓝(2n=2x=CC=18)为材料,通过相互杂交获得了异源三倍体(2n=3x=BCC=26)。该异源三倍体生长势较强;叶色等介于双亲之间;株型、花型和花大小偏向于埃塞俄比亚芥;花色与芥蓝的相同,白花。减数分裂观察表明:在终变期,一般形成9个二价体和8个单价体(9Ⅱ 8Ⅰ),且B、C两组染色体表现出一定程度的分群现象;中期Ⅰ,CC基因组的9个二价体排列在赤道板上,而B组的8个单价体游离在赤道板周围;后期Ⅰ分到两极的染色体以13/13和12/14占多数,偶见落后的染色体。该BCC异源三倍体的获得为创建CC B染色体的异附加系和研究B、C基因组间的亲缘关系奠定了基础。
关键词:  埃塞俄比亚芥  芥蓝  异源三倍体  减数分裂
DOI:
投稿时间:2012-04-22修订日期:2012-11-20
基金项目:
Synthesis and cytological studies of allotriploid interspecies between Brassica carinata and Chinese kale
luoshuangxia
()
Abstract:
The allotriploid interspecies (BCC) were obtained by reciprocal crosses between Brassica carinata (2n=4x=BBCC=34) and Chinese kale (2n=2x=CC=18). The interspecies displayed a stronger growth than parents; the plant and flower type tended to parent B. carinata; and the flower color was the same as parent Chinese kale. Meiosis observation of the allotriploid showed that 9 bivalents and 8 univalents (9Ⅱ 8Ⅰ) were formed at diakinesis, and the two kind of chromosomes (B and C) tended to separate into two groups; at metaphaseⅠ, 9 bivalents of CC genome arranged on equatorial plane and 8 univalents of B genome distributed around the equatorial plane ; and at anaphaseⅠ, the distributions of chromosomes with 13/13 or 12/14 were in the majority. The obtain of this allotriploid (BCC) provides an important material for production of CC B alien addition lines and for study of chromosome homology between B and C genome.
Key words:  Brassica carinata  Chinese kale  Allotriploid  Meiosis

用微信扫一扫

用微信扫一扫