文献类型： 外文期刊

作者： Zhou, N. N. ¹ ; Tang, K. X. ² ; Jeauffre, J. ¹ ; Thouroude, T. ¹ ; Arias, D. C. Lopez ¹ ; Foucher, F. ¹ ; Hibrand-Sain ¹ ;

作者机构： 1.Univ Angers, Inst Rech Hort & Semences, Agrocampus Ouest, GDO IRHS Genet & Divers Ornamental Plants,INRAE, SFR 4207 QUASAV, F-49071 Angers, France

2.Yunnan Acad Agr Sci, Natl Engn Res Ctr Ornamental Hort, Kunming 650231, Yunnan, Peoples R China

3.Yunnan Acad Agr Sci, Flower Res Inst, Kunming 650231, Yunnan, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2020 年 133 卷 11 期

页码：

收录情况： SCI

摘要： Key message The genetic determinism of prickle in rose is complex, with a major locus on LG3 that controls the absence/presence of prickles on the rose stem. Rose is one of the major ornamental plants. The selection of glabrous cultivars is an important breeding target but remains a difficult task due to our limited genetic knowledge. Our objective was to understand the genetic and molecular determinism of prickles. Using a segregating diploid rose F(1)population, we detected two types of prickles (glandular and non-glandular) in the progeny. We scored the number of non-glandular prickles on the floral and main stems for three years. We performed QTL analysis and detected four prickle loci on LG1, 3, 4 and 6. We determined the credible interval on the reference genome. The QTL on LG3 is a major locus that controls the presence of prickles, and three QTLs (LG3, 4 and 1) may be responsible for prickle density. We further revealed that glabrous hybrids are caused by the combination of the two recessive alleles from both parents. In order to test whether rose prickles could originate from a 'trichome-like structure,' we used a candidate approach to characterize rose gene homologues known in Arabidopsis, involved in trichome initiation. Four of these homologues were located within the overlapping credible interval of the detected QTLs. Transcript accumulation analysis weakly supports the involvement of trichome homologous genes, in the molecular control of prickle initiation. Our studies provide strong evidence for a complex genetic determinism of stem prickle and could help to establish guidelines for glabrous rose breeding. New insights into the relationship between prickles and trichomes constitute valuable information for reverse genetic research on prickles.