נגישות
menu      
חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
From mesic to arid environments: Morphological and genetic divergence in Asphodelus aestivus Brot. populations
Year:
2009
Source of publication :
Israel Journal of Plant Sciences
Authors :
קורול, ליאוניד
;
.
שקליאר, גלינה
;
.
Volume :
57
Co-Authors:

Samocha, Y., Department of Plant Sciences, Tel Aviv University, Tel Aviv 69978, Israel
 

Facilitators :
From page:
91
To page:
102
(
Total pages:
12
)
Abstract:
We studied the effects of different environmental conditions on morphological and genetic variations in the Mediterranean geophyte Asphodelus aestivus in Israel. The study included six populations, ranging from mesic Mediterranean to arid ecosystems. The results showed important differential morphological traits in one population of the Mediterranean ecosystem (M1). They included longer leaves, longer inflorescences-stalks, and larger number of flower buds than those found among the other populations. We used RAPD analysis to get a genetic profile for all studied populations: 30 loci revealed by the use of 11 primers were studied on 30 plants from each study site. No unique allele was found. Nevertheless, the MI population was always different from the others in several molecular markers, and even created a different clade on the phylogenetic tree. Abiotic factors were considered to have caused the differentiation of the M1 population. A contingency χ2 test for heterogeneity of RAPD frequencies across all locations revealed significant differences in 17 RAPD loci (57%). The estimated genetic diversity within populations was 0.287 according to Nei's gene diversity and 0.432 according to Shannon's genetic diversity index. Differentiation among six populations of the RAPD loci (GST) ranged from 0.014 to 0.354 with a mean of 0.096. Principal coordinate analysis indicated the presence of genetically distinct sub-regional groups. Genetic and geographical distances among A. aestivus populations along the environmental gradient were found to be correlated, with the exception of the M1 population. In the present study, levels of gene variability within populations were higher than those between populations. Nevertheless, if we discard the unique M1 population, a clear genetic pattern linked to aridity and geographical distance was discerned. © 2009 Science From Israel/LPPLtd., Jerusalem.
Note:
Related Files :
Aridity
desert
genetic analysis
geophyte
heterogeneity
Israel
Mediterranean
Middle East
plant community
Plant traits
עוד תגיות
תוכן קשור
More details
DOI :
10.1560/IJPS.57.1-2.91
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
27214
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:29
You may also be interested in
Scientific Publication
From mesic to arid environments: Morphological and genetic divergence in Asphodelus aestivus Brot. populations
57

Samocha, Y., Department of Plant Sciences, Tel Aviv University, Tel Aviv 69978, Israel
 

From mesic to arid environments: Morphological and genetic divergence in Asphodelus aestivus Brot. populations
We studied the effects of different environmental conditions on morphological and genetic variations in the Mediterranean geophyte Asphodelus aestivus in Israel. The study included six populations, ranging from mesic Mediterranean to arid ecosystems. The results showed important differential morphological traits in one population of the Mediterranean ecosystem (M1). They included longer leaves, longer inflorescences-stalks, and larger number of flower buds than those found among the other populations. We used RAPD analysis to get a genetic profile for all studied populations: 30 loci revealed by the use of 11 primers were studied on 30 plants from each study site. No unique allele was found. Nevertheless, the MI population was always different from the others in several molecular markers, and even created a different clade on the phylogenetic tree. Abiotic factors were considered to have caused the differentiation of the M1 population. A contingency χ2 test for heterogeneity of RAPD frequencies across all locations revealed significant differences in 17 RAPD loci (57%). The estimated genetic diversity within populations was 0.287 according to Nei's gene diversity and 0.432 according to Shannon's genetic diversity index. Differentiation among six populations of the RAPD loci (GST) ranged from 0.014 to 0.354 with a mean of 0.096. Principal coordinate analysis indicated the presence of genetically distinct sub-regional groups. Genetic and geographical distances among A. aestivus populations along the environmental gradient were found to be correlated, with the exception of the M1 population. In the present study, levels of gene variability within populations were higher than those between populations. Nevertheless, if we discard the unique M1 population, a clear genetic pattern linked to aridity and geographical distance was discerned. © 2009 Science From Israel/LPPLtd., Jerusalem.
Scientific Publication
You may also be interested in