scholarly journals The genetic diversity of reed canarygrass (Phalaris arundinaceae L.) assessed by isozyme markers

2016 ◽  
Vol 20 (3) ◽  
pp. 364-369
Author(s):  
R. S. Yudina ◽  
E. K. Khlestkina
Keyword(s):  
Genetic Diversity ◽  
Reed Canarygrass ◽  
Isozyme Markers

Genetic diversity in mulberry (Morusspp.) revealed by isozyme markers

2011 ◽  
Vol 86 (3) ◽  
pp. 291-297 ◽  
Author(s):  
A. Ananda Rao ◽  
K. Vijayan ◽  
M. Krubakaran ◽  
M. M. Borpujari ◽  
C. K. Kamble
Keyword(s):  
Genetic Diversity ◽  
Isozyme Markers

Genetic diversity of nine faba bean (Vicia faba L.) populations revealed by isozyme markers

2011 ◽  
Vol 33 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Ali Ouji ◽  
Maria José Suso ◽  
Mustapha Rouaissi ◽  
Raoudha Abdellaoui ◽  
Mohamed El Gazzah
Keyword(s):  
Genetic Diversity ◽  
Vicia Faba ◽  
Faba Bean ◽  
Isozyme Markers ◽  
Vicia Faba L

scholarly journals Morphological and Isozyme Variation in Natural Populations of the Genus Medicago L. Prospected in Northern Algeria

2015 ◽  
Vol 43 (1) ◽  
pp. 86-95 ◽  
Author(s):  
Imane MEDOUKALI ◽  
Ines BELLIL ◽  
Douadi KHELIFI
Keyword(s):  
Genetic Diversity ◽  
Natural Populations ◽  
Morphological Characteristics ◽  
Genetic Distances ◽  
Glutamate Oxaloacetate Transaminase ◽  
High Genetic Diversity ◽  
Isozyme Markers ◽  
Northern Algeria ◽  
Isozyme Variability ◽  
High Level

As part of the evaluation and enhancement of genetic resources, morphological and isozyme variability within and among 169 accessions, representing 14 species of the genus Medicago L. collected in northern Algeria, was assessed using twelve quantitative traits and two enzymatic systems. Phenotype frequencies were scored in six enzyme zones to determine isozyme variability within and among populations. The data analysis resolved a high level of genetic diversity. Ten morphometric characteristics contributed to the discrimination of the species. The relationship between the collection site environment and phenotypic characteristics was also studied. Esterase (EST) enzyme system was more polymorphic than glutamate oxaloacetate transaminase (GOT) system. Were scored 2 zones with 10 bands and 21 phenotypes for GOT (glutamate oxaloacetate transaminase) and 4 zones with 22 bands and 71 phenotypes for EST (esterase) Polymorphism index and Jaccard’s genetic distances revealed the existence of a high genetic diversity within and among the studied populations. The annual species M. polymorpha presented an intraspecific polymorphism index of 0.57, which was higher than all other species indices. Clustering of the species based on isozyme markers was in agreement with taxonomic criteria and showed no significant correlation with morphological characteristics. Conservation programs should take into account the level of genetic diversity within and between populations revealed by isozyme markers.

scholarly journals Cultivar Identification and Genetic Diversity within a Hatiora (Cactaceae) Clonal Germplasm Collection Using Isozymes

1999 ◽  
Vol 124 (4) ◽  
pp. 373-376
Author(s):  
Maureen C. O'Leary ◽  
Thomas H. Boyle
Keyword(s):  
Genetic Diversity ◽  
Aspartate Aminotransferase ◽  
Triosephosphate Isomerase ◽  
Leucine Aminopeptidase ◽  
Cultivar Identification ◽  
Germplasm Collection ◽  
Shikimate Dehydrogenase ◽  
Isozyme Markers ◽  
Enzyme Systems ◽  
Entire Collection

Isozyme markers were used to identify cultivars and assess the genetic diversity within a germplasm collection of 49 Hatiora Britt. & Rose clones. The collection included accessions of Easter cactus [H. gaertneri (Regel) Barthlott, H. graeseri Barthlott ex D. Hunt, and H. rosea (Lagerheim) Barthlott] plus H. herminiae (Campos-Porto & Castellanos) Backeberg ex Barthlott and H. salcornioides (Haworth) Britton & Rose. Seven enzyme systems were analyzed: aspartate aminotransferase, glucose-6-phosphate isomerase, leucine aminopeptidase, malate dehydrogenase, phosphoglucomutase, shikimate dehydrogenase, and triosephosphate isomerase. Thirteen loci and 42 alleles were identified. Twenty-one clones (43%) displayed unique isozyme profiles, but the remaining 28 clones shared isozyme profiles with one to three other clones. Percent polymorphic loci, mean number of alleles per locus, and mean heterozygosity were 69, 3.23, and 0.30, respectively, for the entire collection. Isozymes also proved useful for verifying that some progeny were genuine F1 hybrids.

Evidence of genetic drift in chestnut populations

1996 ◽  
Vol 26 (5) ◽  
pp. 905-908 ◽  
Author(s):  
N. Machon ◽  
L. Burel ◽  
M. Lefranc ◽  
N. Frascaria-Lacoste
Keyword(s):  
Genetic Diversity ◽  
Genetic Drift ◽  
Isozyme Markers ◽  
Human Interference ◽  
Subsequent Propagation

The genetic diversity and differentiation of six French populations of chestnut, Castaneasativa Mill., were analysed with isozyme markers. This work extends previous studies on Italian and Turkish populations. Results suggest that human interference has dramatically reduced the number of alleles per locus. This reduction is probably due to the process of genetic drift, as successively smaller numbers of genotypes were sampled in the course of reforestation and subsequent propagation of this species.

scholarly journals Assessing the genetic structure of Oryza glumaepatula populations with isozyme markers

2008 ◽  
Vol 51 (5) ◽  
pp. 873-882 ◽  
Author(s):  
Elizabeth Ann Veasey ◽  
Daruska Cardin ◽  
Rainério Meireles Silva ◽  
Eduardo de Andrade Bressan ◽  
Roland Vencovsky
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Genetic Differentiation ◽  
Mating System ◽  
Outcrossing Rate ◽  
Structure Parameters ◽  
Mato Grosso ◽  
Isozyme Markers ◽  
Self Fertilization ◽  
Oryza Glumaepatula

To assess the genetic diversity and genetic structure parameters, nine populations of Oryza glumaepatula from the Amazon biome, four from the Pantanal biome, and one collected at Rio Xingu, Mato Grosso, totaling 14 populations and 333 individuals were studied with isozyme markers. Six loci were evaluated showing a moderate allozyme variability (A = 1.21, P = 20.7%, Ho = 0.005, He = 0.060). The populations from the Pantanal biome showed higher diversity levels than the Amazon biome. High genetic differentiation among the populations, expected for self-fertilizing species, was observed (F ST=0.763), with lower differentiation found among the Pantanal populations (F ST=0.501). The average apparent outcrossing rate was higher for the Pantanal populations (t a = 0.092) than for the Amazonian populations (t a = 0.003), while the average for the 14 populations was 0.047, in accordance with a self-fertilization mating system.

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