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Nineteenth century French rose Rosa sp.) germplasm shows a shift over time from a European to an Asian genetic background

文献类型： 外文期刊

作者： Liorzou, Mathilde 1 ; Pernet, Alix 1 ; Li, Shubin 1 ; Chastellier, Annie 1 ; Thouroude, Tatiana 1 ; Michel, Gilles; 1 ;

作者机构： 1.Univ Angers, IRHS, Agrocampus Ouest, INRA,SFR QuaSaV 4207, F-49071 Beaucouze, France

2.Yunnan Acad Agr Sci, Flower Res Inst, Kunming 650205, Peoples R China

3.Univ An

关键词： Diversity;genetic structure;historical resources;hybridization;ornamental plant;ploidy level;Rosa sp;SSR markers

期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：6.992； 五年影响因子：7.86 ）

ISSN：

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收录情况： SCI

摘要： The impact of breeding on the genetic diversity and structure of roses, during the 19th century in Europe, was studied using a genetic and historical interdisciplinary approach.Hybridization with introduced genetic resources is commonly practiced in ornamental plant breeding to introgress desired traits. The 19th century was a golden age for rose breeding in France. The objective here was to study the evolution of rose genetic diversity over this period, which included the introduction of Asian genotypes into Europe. A large sample of 1228 garden roses encompassing the conserved diversity cultivated during the 18th and 19th centuries was genotyped with 32 microsatellite primer pairs. Its genetic diversity and structure were clarified. Wide diversity structured in 16 genetic groups was observed. Genetic differentiation was detected between ancient European and Asian accessions, and a temporal shift from a European to an Asian genetic background was observed in cultivated European hybrids during the 19th century. Frequent crosses with Asian roses throughout the 19th century and/or selection for Asiatic traits may have induced this shift. In addition, the consistency of the results with respect to a horticultural classification is discussed. Some horticultural groups, defined according to phenotype and/or knowledge of their pedigree, seem to be genetically more consistent than others, highlighting the difficulty of classifying cultivated plants. Therefore, the horticultural classification is probably more appropriate for commercial purposes rather than genetic relatedness, especially to define preservation and breeding strategies.

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