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园艺学报 ›› 2009, Vol. 36 ›› Issue (11): 1681-1684.

• 研究报告 • 上一篇    下一篇

秋水仙素离体诱导同源四倍体青花菜

张蜀宁*; 张丽丽;唐君;孔艳娥;侯喜林   

  1. (南京农业大学园艺学院, 作物遗传与种质创新国家重点实验室, 南京210095)
  • 收稿日期:2009-06-15 修回日期:2009-09-07 出版日期:2009-11-25 发布日期:2009-11-25
  • 通讯作者: 张蜀宁

In Vitro Induction of Autotetraploid Broccoli with Colchicine

ZHANG Shu-ning*;ZHANG Li-li;TANG Jun;KONG Yan-e;HOU Xi-lin   

  1. (College Horticulture State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agriculture University, Nanjing 210095, China)
  • Received:2009-06-15 Revised:2009-09-07 Online:2009-11-25 Published:2009-11-25
  • Contact: ZHANG Shu-ning

摘要: 以青花菜品种‘海兹’高频再生试管苗为外植体, 利用秋水仙素离体诱导四倍体。结果表明: 用含秋水仙素200 mg·L - 1的MS + 0.1 mg·L -1NAA + 6.0 mg·L - 1 6-BA液体培养基处理2 cm长的再生苗48 h, 每个外植体平均可产芽2.1个, 再生植株变异率为83.33% , 四倍体诱导率达79.17%。与二倍体相比, 四倍体植株叶片、花冠、气孔等均表现巨大性; 流式细胞仪倍性鉴定显示, 对照DNA相对含量为200, 四倍体再生植株为400。四倍体根尖染色体2n = 4x = 36。

关键词: 青花菜, 离体培养, 秋水仙素, 四倍体

Abstract: In this study, the tube plantlets of broccoliwere cultured on Murashige and Skoog fluid medium supplemented 6-BA and NAA in combinationswith different concentrations of colchicine and treatment time to induce tetraploid. The results showed that the treatmentwith 200 mg· L - 1 colchicines inMS + 011 mg·L - 1 NAA + 6.0 mg·L - 1 6-BA for 48 hours yielded doubled chromosomes at highest rates, the number of shoots per exp lant was 2.1, the variation efficiency was 83.33% , and the variational rate of tetrap loid was 79.17 %. Compared with the dip loid, the tetrap loid plants possessed gigantism in leaves, floral, stomata of plantlets. The flow cytometry was used to identify the ploidy of induced plants. The result suggested that the relative DNA content of controlwas 200 and the number of chromosome was 2n = 2x = 18, and tetrap loid relative DNA contentwas 400 and the number of chromosome was 2n = 4x = 36. The identification of the chromosome analysis indicated the regeneration plantletswere tetraploid.

Key words: Brassica oleracea L. var. italica Planch., in vitro culture, colchicines, tetraploid

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