C-banding analysis on wild Emmer (Triticum dicoccoides Körn) strains with and without spontaneous reciprocal translocations

1996 ◽  
Vol 92 (2) ◽  
pp. 173-178 ◽  
Author(s):  
S. Taketa ◽  
T. Kawahara
2009 ◽  
Vol 35 (5) ◽  
pp. 761-767 ◽  
Author(s):  
Gen-Qiao LI ◽  
Ti-Lin FANG ◽  
Hong-Tao ZHANG ◽  
Chao-Jie XIE ◽  
Zuo-Min YANG ◽  
...  

2017 ◽  
Vol 8 ◽  
Author(s):  
Jing Ren ◽  
Liang Chen ◽  
Xiaoli Jin ◽  
Miaomiao Zhang ◽  
Frank M. You ◽  
...  

2016 ◽  
Vol 76 (2) ◽  
pp. 360-366 ◽  
Author(s):  
P. B. Nishiyama ◽  
M. M. R. Vieira ◽  
F. E. Porto ◽  
L. A. Borin ◽  
A. L. B. Portela-Castro ◽  
...  

Abstract The group Incertae sedis within the Characidae family currently includes 88 genera, previously included in the subfamily Tetragonopterinae. Among them is the genus Astyanax comprising a group of species with similar morphology and widely distributed in the Neotropics. Thus, the present study aimed to analyze the karyotype diversity in Astyanax species from different watersheds by conventional Giemsa staining, C-banding and fluorescence in situ hybridization (FISH rDNA 18S) probe.specimens of Astyanax aff. paranae belonging to the “scabripinnis complex”, Astyanax asunsionensis and Astyanax aff. bimaculatus were analyzed”. Two sympatric karyomorphs were observed in Astyanax.aff paranae, one of them having2n=48andthe other one with 2n=50 chromosomes. Other population of this same species also presented 2n=50 chromosomes, but differing in the karyotype formula and with macro supernumerary chromosome found in 100% of the cells in about 80%of females analyzed. Two population of A. asuncionensis and one population of Astyanax. aff. bimaculatus, also showed a diploid number of 50 chromosomes, but also differing in their karyotype formulas. Therefore, A. asuncionensis was also characterized by intraspecific chromosome diversity. The C-banding analysis was able to demonstrate a distinctable to demonstrate a distinct pattern of heterochromatin differing A. asuncionensis from Astyanax aff. paranae and Astyanax aff. bimaculatus. The supernumerary chromosome of Astyanax aff. paranae proved completely heterochromatic. Only Astyanax.aff. bimaculatus multiple showed multiple sites of nucleolar organizing regions. The other species were characterized by having a simple system of NOR. These data contributes to the know ledge of the existing biodiversity in our fish fauna, here highlighted by the inter- and intraspecific chromosomal diversity in the genus Astyanax.


2010 ◽  
Vol 58 (1) ◽  
pp. 11-53 ◽  
Author(s):  
Hakan Özkan ◽  
George Willcox ◽  
Andreas Graner ◽  
Francesco Salamini ◽  
Benjamin Kilian

1997 ◽  
Vol 45 (1) ◽  
pp. 31-37 ◽  
Author(s):  
A.A. Jaradat

Univariate and multivariate analyses and numerical taxonomy procedures were utilized on the standardized mean values of 17 quantitative traits in the base collection of wild emmer wheat,Triticum dicoccoidesKorn., from Jordan, in an effort to identify ecotypes by trait measurements. Five ecotypes were identified on the basis of morphological, developmental, and productive traits. The five ecotypes exhibited different adaptive trait complexes as revealed by principal component and pairwise correlation analyses. It is postulated that particular environmental conditions across the distributional ranges of the species in Jordan resulted in the evolution of adaptive gene complexes which are conserved by genetic linkage or natural selection. The five ecotypes represented the marginal, peripheral, and central distributional range of the species in the country. Two extreme and three intermediate ecotypes were recognized. The extreme ecotypes represent the “grassy” and “robust” types recognized earlier. The three intermediate ecotypes differed markedly from the former two and from each other. They exhibited different patterns of trait associations. A gradual increase in Euclidean distances among these ecotypes was observed as their collection sites moved from marginal to peripheral, and then to central regions of the species' distributional range in Jordan.


2002 ◽  
Vol 104 (1) ◽  
pp. 17-29 ◽  
Author(s):  
T. Fahima ◽  
M. S. Röder ◽  
K. Wendehake ◽  
V. M. Kirzhner ◽  
E. Nevo

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