Karyotype Analysis and Genome Size Estimation Using Flow Cytometry of the Genus Encyclia Hook. (Orchidaceae: Laeliinae)
文献类型： 外文期刊
作者： Zhou, Chengcheng 1 ; Leng, Qingyun 2 ; Lu, Jinping 2 ; Xu, Shisong 2 ; Peng, Donghui 1 ; Yin, Junmei 2 ; Niu, Junhai 2 ;
作者机构： 1.Fujian Agr & Forestry Univ, Coll Landscape Architecture & Art, Fuzhou 350002, Peoples R China
2.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Natl Key Lab Trop Crop Breeding, Haikou 571737, Peoples R China
3.Engn Technol Res Ctr Trop Ornamental Plant Germpla, Haikou 571737, Peoples R China
4.Minist Agr & Rural Affairs MARA, Key Lab Crop Gene Resources & Germplasm Enhancemen, Haikou 571737, Peoples R China
5.Key Lab Trop Crops Germplasm Resources Genet Impro, Haikou 571737, Peoples R China
6.Chinese Acad Trop Agr Sci, Sanya Res Inst, Sanya 572000, Peoples R China
关键词：
期刊名称：DIVERSITY-BASEL （ 影响因子：2.1； 五年影响因子：2.3 ）
ISSN：
年卷期： 2025 年 17 卷 1 期
页码：
收录情况： SCI
摘要： Encyclia Hook. is a tropical orchid known for its delightful fragrance and distinctive flower shapes, which have been widely used as superior parents for inter and intrageneric breeding. In this study, karyotype analysis shows that the number of chromosomes in diploid plants of Encyclia is 40, with all species exhibiting mesial and central filamentous chromosomes. The karyotype of diploid plants is primarily 2B. Among the three detected intergeneric hybrids, both Enanthleya Circus Lady 'Coastal Star' and Guaricyclia Kyoguchi 'Fumi' are triploid, while Robertsara 'Green Wonder' is tetraploid. By evaluating various lysates and tissues, a flow cytometry system (FCM) is developed with Galbraith's buffer (GLB) and tender leaves. By using Dendrobium officinale as an external reference, the genome size of the Encyclia species and its intra and intergeneric hybrids are assessed, which ranges from 1.07 Gb to 3.23 Gb. These results will establish a foundation for high-throughput identification of germplasms, advance crossbreeding efforts, and enhance the understanding of the genome in Encyclia.
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