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草业学报  2011 

两个高羊茅品种成熟种子再生体系的建立

, PP. 210-218

Keywords: 高羊茅,成熟种子,再生体系

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Abstract:

以2个高羊茅品种(“Plantation”和“沪坪1号”)的成熟种子为外植体,在MS培养基上分别添加不同浓度的2种植物生长调节剂,探索其愈伤组织的诱导、继代和分化的最佳激素配比及其相互间的影响,以建立简便高效的再生体系。结果表明,完整高羊茅种子最佳的愈伤诱导培养基为MS+2,4-D3mg/L,诱导率为71%;而把成熟种子进行纵切后得到的半粒种子的较优的愈伤诱导培养基为MS+2,4-D2.5mg/L,诱导率占半粒种子外植体的60%,占完整种子(2个半粒种子)外植体的90%以上;在最优诱导培养基上产生的愈伤组织的最佳继代培养基为MS+2,4-D3mg/L,其胚性愈伤诱导率为70%,而添加6-BA则抑制2,4-D对胚性愈伤组织的诱导;不同品种的最优的分化培养基不同——“Plantation”的最优分化培养基为MS+2,4-D1mg/L+6-BA1mg/L,而“沪坪1号”的最佳组合是MS+2,4-D2mg/L+6-BA1mg/L,分化率分别达到50%和56%。生根培养基采用已报道的组合1/2MS+NAA0.5mg/L,生根率达100%。

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