Genetic diversity, population structure, pollen morphology and cross‐compatibility among Chinese Cymbidiums. Issue 1 (5th December 2013)

• Record Type: Journal Article
• Authors: Li, Xiaobai; Xiang, Lin; Wang, Yan; Luo, Jie; Wu, Chao; Sun, Chongbo; Xie, Ming; Debener, T.
• Is Part Of: Plant breeding. Volume 133:Issue 1(2014)
• Page Start: 145
• Page End: 152
• Publication Date: 2013-12-05
• Subjects: Plant breeding -- Periodicals; 631.52
• DOI: 10.1111/pbr.12125
• Languages: English
• ISSNs: 0179-9541

Abstract

<abstract abstract-type="main" id="pbr12125-abs-0001"> <title>Abstract</title> <p>A total of 85 Chinese <italic>Cymbidiums</italic> and one <italic>Zygopetalum</italic> were collected and analysed using 29 simple sequence repeats (SSRs) and 12 intersimple sequence repeats (ISSRs). These Chinese <italic>Cymbidiums</italic> are some of the most popular cultivars in market. The pairwise genetic distance between these accessions averaged 0.897, ranging from 0.259 to 1.000. A model‐based clustering analysis revealed five genetic groups with serious admixture ancestry, as indicated by a fixation index of 0.156 and only 10.67% genetic variation among groups. By analysing the cross‐compatibility and pollen morphology, Chinese <italic>Cymbidiums</italic> are revealed to have high compatibility for intra‐ and interspecific crosses. Notably, <italic>Zygopetalum mackayi</italic> had high compatibility with Chinese <italic>Cymbidiums</italic> and shared similar morphologies in terms of pollinia and pollen grain. This study is the first to report a successful cross between <italic>Zygopetalum</italic> and Chinese <italic>Cymbidiums</italic>. The high compatibility offers the potential for introducing <italic>Zygopetalum mackayi</italic>'s superior traits into Chinese <italic>Cymbidiums</italic>. The similar pollen morphology as well as the low genetic differentiation might be related to the high cross‐compatibility among these accessions.</p> </abstract>