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Phenotypic variation of wild radishes Raphanus pugioniformis and R. raphanistrum associated with local conditions in the southeast Mediterranean
Year:
2022
Source of publication :
Flora
Authors :
Barazani, Oz
;
.
Barzilai, Michal
;
.
Volume :
287
Co-Authors:

Hagga iWasser strom
Jotham Ziffer Berger
Michal Barzilai
Klaus Mummenhoff
Oz Barazani

Facilitators :
From page:
0
To page:
0
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Total pages:
1
)
Abstract:

The geographical distribution of Raphanus pugioniformis (Brassicaceae), endemic to the southeast Mediterranean, covers distinct and heterogeneous habitats over a slight rainfall and elevation gradients. In contrast, the closely related R. raphanistrum is widely distributed only in well-drained sandy soils along the Mediterranean coastal plain. Here we hypothesize that the allopatric distribution of the two species, assisted by short- and long-seed dispersal of R. pugioniformis and R. raphanistrum, respectively, is also associated with inter- and intra-species phenotypic variation. In a common garden experiment, we assessed various phenological, morphological and fitness-related traits in five populations of each species. The results showed significant differences between the two species, generally in phenological and fitness-related traits. The results point to the role of early flowering and large reproductive output in the wide distribution of R. raphanistrum. In contrast, phenotypic variation in most of the measured traits among populations of R. pugioniformis suggests that short dispersal distance contributed to increased phenotypic differentiation among populations. Moreover, significant correlations between several of the measured traits with rainfall and elevation (e.g., bolting date and duration of flowering) suggest adaptive phenotypic differentiation. In R. raphanistrum, differences in most phenotypic traits were not found between populations, supporting the hypothesis that long distance dispersal of single seeded units contributes to relatively low genetic variation. Finally, we suggest that it is also possible that R. raphanistrum exhibits strong plastic responses, explaining its worldwide distribution, although this remained to be investigated.

Note:
Related Files :
Aridity
Ecotypic differentiation
fitness
Flowering time
rainfall
Wild radishes
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Related Content
More details
DOI :
10.1016/j.flora.2021.151997
Article number:
151997
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
57799
Last updated date:
02/03/2022 17:27
Creation date:
03/02/2022 23:06
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Scientific Publication
Phenotypic variation of wild radishes Raphanus pugioniformis and R. raphanistrum associated with local conditions in the southeast Mediterranean
287

Hagga iWasser strom
Jotham Ziffer Berger
Michal Barzilai
Klaus Mummenhoff
Oz Barazani

Phenotypic variation of wild radishes Raphanus pugioniformis and R. raphanistrum associated with local conditions in the southeast Mediterranean

The geographical distribution of Raphanus pugioniformis (Brassicaceae), endemic to the southeast Mediterranean, covers distinct and heterogeneous habitats over a slight rainfall and elevation gradients. In contrast, the closely related R. raphanistrum is widely distributed only in well-drained sandy soils along the Mediterranean coastal plain. Here we hypothesize that the allopatric distribution of the two species, assisted by short- and long-seed dispersal of R. pugioniformis and R. raphanistrum, respectively, is also associated with inter- and intra-species phenotypic variation. In a common garden experiment, we assessed various phenological, morphological and fitness-related traits in five populations of each species. The results showed significant differences between the two species, generally in phenological and fitness-related traits. The results point to the role of early flowering and large reproductive output in the wide distribution of R. raphanistrum. In contrast, phenotypic variation in most of the measured traits among populations of R. pugioniformis suggests that short dispersal distance contributed to increased phenotypic differentiation among populations. Moreover, significant correlations between several of the measured traits with rainfall and elevation (e.g., bolting date and duration of flowering) suggest adaptive phenotypic differentiation. In R. raphanistrum, differences in most phenotypic traits were not found between populations, supporting the hypothesis that long distance dispersal of single seeded units contributes to relatively low genetic variation. Finally, we suggest that it is also possible that R. raphanistrum exhibits strong plastic responses, explaining its worldwide distribution, although this remained to be investigated.

Scientific Publication
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