Articles
Volatile compounds inheritance in tetraploid rose
Article number
1461_13
Pages
119 – 128
Language
English
Abstract
The fragrance of roses comes from a complex blend of volatile organic compounds (VOCs) that can be classified into different families, according to their biosynthesis pathways.
Monoterpenoids, sesquiterpenoids, phenylpropanoids, apocarotenoids, and fatty acid derivatives are the main biochemical families.
In roses, among these VOCs, monoterpenoids, 2-phenylethanol, and 3,5-dimethoxytoluene, are frequently found in modern roses.
Compared to the available biochemical information, little is known about the inheritance of these VOCs in rose.
In this study, we analysed the inheritance of rose fragrance in three tetraploid segregating populations.
We found that each volatile compound should be considered as a single selection trait and that fragrance was not a binary character.
The observed quantitative segregation indicates the involvement of many genes in the biosynthesis of each VOC. Transgressive segregation was observed in both directions, with offspring displaying extreme phenotypes, mostly more pronounced than those of the parental lines.
Moreover, a given compound could show different segregation patterns in different populations.
Interestingly, within a given population, VOCs belonging to the same biochemical families appeared to have similar segregation patterns and were generally strongly correlated with each other.
Targeting different biosynthetic pathways in breeding programs may help to produce VOCs of interest, leading to the creation of a specific blend of fragrance.
A better understanding of the inheritance of the fragrant character of tetraploid roses could lead to further genetic analyses and future rose breeding programs.
Monoterpenoids, sesquiterpenoids, phenylpropanoids, apocarotenoids, and fatty acid derivatives are the main biochemical families.
In roses, among these VOCs, monoterpenoids, 2-phenylethanol, and 3,5-dimethoxytoluene, are frequently found in modern roses.
Compared to the available biochemical information, little is known about the inheritance of these VOCs in rose.
In this study, we analysed the inheritance of rose fragrance in three tetraploid segregating populations.
We found that each volatile compound should be considered as a single selection trait and that fragrance was not a binary character.
The observed quantitative segregation indicates the involvement of many genes in the biosynthesis of each VOC. Transgressive segregation was observed in both directions, with offspring displaying extreme phenotypes, mostly more pronounced than those of the parental lines.
Moreover, a given compound could show different segregation patterns in different populations.
Interestingly, within a given population, VOCs belonging to the same biochemical families appeared to have similar segregation patterns and were generally strongly correlated with each other.
Targeting different biosynthetic pathways in breeding programs may help to produce VOCs of interest, leading to the creation of a specific blend of fragrance.
A better understanding of the inheritance of the fragrant character of tetraploid roses could lead to further genetic analyses and future rose breeding programs.
Authors
S.N. Paramita, J.C. Caissard, D. Saint-Marcoux, G. Beaugey, J. Einhorn, B. Boachon, M. Lopez, A. Rius-Bony, F. Foucher, L. Hibrand-Saint Oyant, S. Meilland, S. Baudino
Keywords
rose, floral scent, volatiles, inheritance
Online Articles (23)