17个杂交兰及3个大花蕙兰品种的染色体研究

对引进的17个杂交兰及3个大花蕙兰品种进行了染色体数目及倍性分析。结果表明,杂交兰品种染色体倍性多样化程度较高,其中二倍体品种10个、占总数的58.8%,非整倍体品种5个、占总数的29.4%,三倍体品种较少（仅2个）、占总数的11.8%;3个大花蕙兰品种中有2个三倍体和1个四倍体。在二倍体杂交兰FG784和四倍体大花蕙兰DB918的4个杂交F1代个体中,发现3个三倍体和1个六倍体,表明在杂交兰和大花蕙兰的杂交过程中会出现染色体自然加倍的现象,由此可以获得倍性更高的杂交后代。...

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Bibliographic Details
Published in广东农业科学 Vol. 42; no. 8; pp. 26 - 28
Main Author 谢佩吾 李早文 伍爱萍 朱根发 江南
Format Journal Article
LanguageChinese
Published 东莞市农业科学研究中心,广东东莞,523086%广东省农科院环境园艺研究所,广东广州,510640 2015
Subjects
倍性
大花蕙兰
杂交兰
染色体数目
倍性
大花蕙兰
杂交兰
染色体数目
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Summary:对引进的17个杂交兰及3个大花蕙兰品种进行了染色体数目及倍性分析。结果表明,杂交兰品种染色体倍性多样化程度较高,其中二倍体品种10个、占总数的58.8%,非整倍体品种5个、占总数的29.4%,三倍体品种较少（仅2个）、占总数的11.8%;3个大花蕙兰品种中有2个三倍体和1个四倍体。在二倍体杂交兰FG784和四倍体大花蕙兰DB918的4个杂交F1代个体中,发现3个三倍体和1个六倍体,表明在杂交兰和大花蕙兰的杂交过程中会出现染色体自然加倍的现象,由此可以获得倍性更高的杂交后代。
Bibliography:Chromosome numbers and ploidy levels of 17 cultivars of hybrid Cymbidium and three cuhivars of Cymbidium hybridium were analyzed. The hybrid Cymbidium had high degree of chromosome ploidy diversity, among which 10 cuhivars was diploid （58.8%）, five and two cuhivars were aneuploid （29.4%）and triploid （11.8%）respectively. Two triploid and one tetraploid in three cuhivars of C. hybridium were recorded. Three triploid and one hexaploid were found in the four hybrid F1 individuals generated from hybrid Cymbidium ＇FG784＇×C. hybridium ＇DB91S＇ , suggesting that the chromosome of hybrid Cymbidium and C. hybridium would be double spontaneously during their cross breeding, and from which the new cultivars with higher ploidy level might be produced.
44-1267/S
ploidy level; chromosome number; Cymbidium hybridium; hybrid Cymbidium
XIE Pei-wu, LI Zao-wen, WU Ai-ping, ZHU Gen-fa, JIANG Nan （1. Dongguan Agricultural Research Center, Dongguan 523086, China; 2. Environmental Horticulture Research Institute, Guangdong Academy of Ag
ISSN:1004-874X