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Modern rose hybrids have a worrying lack of genetic diversity [View all]
https://www.newscientist.com/article/2428026-modern-rose-hybrids-have-a-worrying-lack-of-genetic-diversity/Modern rose hybrids have a worrying lack of genetic diversity
Intensive breeding since the 19th century has created thousands of varieties of rose, but a reduction in genetic diversity could leave them vulnerable to diseases and climate change
By James Woodford
25 April 2024
Modern commercial roses have lost over a quarter of their genetic diversity compared with older varieties, which could leave them vulnerable to diseases or climate change.
Roses have been admired and grown since antiquity, when people in Asia and Europe began cultivating ancient varieties from a dozen wild rose species. There were less than 100 varieties before 1800, but by 1900 there were around 8000 varieties of crossed Asian and European roses. Now, there are as many as 35,000.
To reconstruct the genetic history of roses, Thibault Leroy at the University of Angers, France, and his colleagues sequenced 15 varieties, including ancient European and ancient Asian cultivars, early Asian-European hybrids and hybrid tea roses.
[...]
Intensive breeding since the 19th century has created thousands of varieties of rose, but a reduction in genetic diversity could leave them vulnerable to diseases and climate change
By James Woodford
25 April 2024
Modern commercial roses have lost over a quarter of their genetic diversity compared with older varieties, which could leave them vulnerable to diseases or climate change.
Roses have been admired and grown since antiquity, when people in Asia and Europe began cultivating ancient varieties from a dozen wild rose species. There were less than 100 varieties before 1800, but by 1900 there were around 8000 varieties of crossed Asian and European roses. Now, there are as many as 35,000.
To reconstruct the genetic history of roses, Thibault Leroy at the University of Angers, France, and his colleagues sequenced 15 varieties, including ancient European and ancient Asian cultivars, early Asian-European hybrids and hybrid tea roses.
[...]
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