Study on the phylogenetic position and hybrid origination of Rosa praelucens Byhouwer

doi:10.13430/j.cnki.jpgr.20180109001

Home > Archive>Volume 19, Issue 5, 2018 >1006-1015. DOI:10.13430/j.cnki.jpgr.20180109001

Study on the phylogenetic position and hybrid origination of Rosa praelucens Byhouwer
DOI:
                        10.13430/j.cnki.jpgr.20180109001
                    
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Affiliation:1Flower Research Institute, Yunnan Academy of Agricultural Sciences / Yunnan Key Laboratory for Flower Breeding / National Engineering Research Center of Ornamental Horticulture, Kunming 650205;2 Life School of Yunnan University, Kunming 650091,1Flower Research Institute, Yunnan Academy of Agricultural Sciences / Yunnan Key Laboratory for Flower Breeding / National Engineering Research Center of Ornamental Horticulture, Kunming 650205;,1Flower Research Institute, Yunnan Academy of Agricultural Sciences / Yunnan Key Laboratory for Flower Breeding / National Engineering Research Center of Ornamental Horticulture, Kunming 650205;,1Flower Research Institute, Yunnan Academy of Agricultural Sciences / Yunnan Key Laboratory for Flower Breeding / National Engineering Research Center of Ornamental Horticulture, Kunming 650205;,1Flower Research Institute, Yunnan Academy of Agricultural Sciences / Yunnan Key Laboratory for Flower Breeding / National Engineering Research Center of Ornamental Horticulture, Kunming 650205;,1Flower Research Institute, Yunnan Academy of Agricultural Sciences / Yunnan Key Laboratory for Flower Breeding / National Engineering Research Center of Ornamental Horticulture, Kunming 650205;,1Flower Research Institute, Yunnan Academy of Agricultural Sciences / Yunnan Key Laboratory for Flower Breeding / National Engineering Research Center of Ornamental Horticulture, Kunming 650205;,1Flower Research Institute, Yunnan Academy of Agricultural Sciences / Yunnan Key Laboratory for Flower Breeding / National Engineering Research Center of Ornamental Horticulture, Kunming 650205;,1Flower Research Institute, Yunnan Academy of Agricultural Sciences / Yunnan Key Laboratory for Flower Breeding / National Engineering Research Center of Ornamental Horticulture, Kunming 650205;
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Abstract:

Rosa praelucens Byhouwer is a famous alpine flower and rose germplasm resource highly tolerant to coldness endemic to Yunnan. It is also the only decaploid wild rose once reported. However, its phylogenetic position is still a debatable point and its origination is unclear yet. In this study, its phylogenetic position was explicated by reconstructing the phylogeny of 49 rose species based on 5S rDNA and 4 chloroplast DNA fragments, i. e. psbA-atpH, rbcL, rpl16 and trnL-F. Its original ancestors were postulated by sequence alignment and base comparison with its closely related species. The results were as the follows. Firstly, the sequence length of 5S rDNA was 498-573 bp and varied significantly among species. The combined alignment of 4 cpDNA fragments had 2969 bases, 170 of which were polymorphic. Secondly, both phylogenetic tree based on 5S rDNA and cpDNA supported that R. praelucens clustered with species from Sect. Cinnamomeae, rather than R. roxburghii of Sect. Microphyllae. Thus, it should be placed in Sect. Cinnamomeae rather than Sect. Microphyllae. Thirdly, the origination of R. praelucens was very complex. Rosa murielae was its most possible maternal ancestor. Both R. gracilifolia and R. moyesii were its paternal ancestors, but R. caudata and R. davidii might also have participated the hybrid origination of R. praelucens as paternal parent.

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Received:January 09,2018
Revised:May 08,2018
Adopted:February 11,2018
Online: September 14,2018
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