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草业学报  2013 

秋水仙素诱导获得自交结实的海滨雀稗体细胞突变体

DOI: 10.11686/cyxb20130626, PP. 205-212

Keywords: 海滨雀稗,二倍体,自交结实,秋水仙素,体细胞突变体

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Abstract:

以海滨雀稗Adalayd幼穗离体诱导获得的胚性愈伤组织为材料,在愈伤组织继代培养基中添加500~2000mg/L秋水仙素,诱变处理24,48和72h后,离体筛选得到浅黄色颗粒状愈伤组织在分化培养基上再生出植株,再生植株结实性调查结果显示,获得的1960株不同秋水仙素处理的再生植株和688株原始对照组织培养再生植株中,经1000mg/L秋水仙素诱变处理24h获得的2个单株上分别收获了4和3粒种子,500mg/L秋水仙素诱变处理24h获得的1个单株上收获到1粒种子;3个单株上收获的M1种子各取1粒播种于盆体,均可发芽成坪,分别记为SP2008-1、SP2008-2和SP2008-3,M1种子苗上分别收获到了自交结实的M2代种子253,38和45粒,种子千粒重分别为0.471,0.440和0.496g。染色体计数结果表明,SP2008-1和SP2008-2染色体数2n=20,与原始对照Adalayd染色体数目相同,为二倍体;SP2008-3的染色体数为20和40条的分别占86.7%和13.3%,是二倍体和四倍体的嵌合体。RAPD检测结果表明,SP2008-1、SP2008-2和SP2008-3在分子水平上均与对照Adalayd存在差异,为自交结实型海滨雀稗体细胞突变体。

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