Influence of stock plant pretreatment on gynogenic embryo induction from flower buds of onion

被引:23
作者
Puddephat, IJ [1 ]
Robinson, HT [1 ]
Smith, BM [1 ]
Lynn, J [1 ]
机构
[1] Hort Res Int, Wellesbourne CV35 9EF, Warwick, England
关键词
Allium cepa L; double haploid; gynogenesis; stock-plant-pre-treatment;
D O I
10.1023/A:1006312614874
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The gynogenic response of a range of onion genotypes to flower bud culture was compared using a two-step culture system. Embryogenic cultures and plantlets were produced from unpollinated ovules in whole flower bud explants 6 to 19 weeks after culture initiation. Preconditioning stock plants significantly influenced gynogenic embryogenesis. A ten-fold increase in embryogenesis was obtained when flower buds were cultured from stock plants maintained at 15 degrees C compared to 10 degrees C or the ambient temperature conditions of a glasshouse (maximum-minimum of 25-12.7 degrees C). A total of 49 embryos was obtained from 2660 cultured flower buds and 45% of plantlets were successfully acclimatised to glasshouse conditions. The majority of acclimatised plantlets were haploid (68%) but spontaneous double haploid plants (23%) were obtained from three genotypes.
引用
收藏
页码:145 / 148
页数:4
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