In vitro induction of tetraploid ginger (Zingiber officinale Roscoe) and its pollen fertility and germinability

被引:76
作者
Adaniya, S [1 ]
Shirai, D [1 ]
机构
[1] Univ Ryukyus, Coll Agr, Okinawa 9030213, Japan
关键词
Zingiber officinale; tetraploids; in vitro culture; pollen fertility; pollen germination;
D O I
10.1016/S0304-4238(00)00212-0
中图分类号
S6 [园艺];
学科分类号
0902 ;
摘要
In vitro induction of tetraploid ginger (Zingiber officinale Roscoe) and its pollen fertility and germinability were investigated. The growth of shoot tip cultures on agar MS medium containing 2.0 mg 1(-1) BA was greater than that of similar cultures in liquid MS medium with the same Bq concentration. In liquid medium, the combinations of 0.5, 1.0, or 2.0 mg 1(-1) BA with 0.05 mg 1(-1) NAA tended to enhance the growth of the cultures. The efficiency of tetraploid induction was assessed by treating shoot tip explants on agar or in liquid MS medium containing 2.0 mg 1(-1) BA, 0.05 mg 1(-1) NAA, and 0.2% (w/v) colchicine for 4, 8, 12, and 14 days. The total number of tetraploids induced on solid medium was 18, but only five in liquid medium. On both media, the colchicine treatment for 8 days gave the maximum level of tetraploid induction. Therefore, it was found that the treatment of shoot tip explants on agar medium containing 2.0mg 1(-1) BA, 0.05 mg 1(-1) NAA, and 0.2% (w/v) colchicine for 8 days was the most efficient way of inducing tetraploid ginger. Induced tetraploid strains,'4x Kintoki', '4x Sanshu', and '4x Philippine cebu 1', had higher pollen fertility and germinability than the diploid counterparts, i.e., in the diploid strains, pollen fertility ranged from 0.3 to 6.2% and the germination rate from 0.0 to 0.1%, while in the tetraploid strains, pollen fertility ranged from 27.4 to 74.2% and the germination rate from 4.8 to 12.9%. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:277 / 287
页数:11
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