scholarly journals DNA markers reveal genetic structure and localized diversity of Ethiopian sorghum landraces

2016 ◽  
Vol 15 (41) ◽  
pp. 2301-2311 ◽  
Author(s):  
Desmae Haile ◽  
R. Jordan David ◽  
D. Godwin Ian
2019 ◽  
Vol 98 (2) ◽  
Author(s):  
Abuzer Güler ◽  
Elmas Karakoç ◽  
Güven Gökdere ◽  
Ersin Doğaç ◽  
Vatan Taşkin

2021 ◽  
Author(s):  
◽  
Clare Louise Gebbie

<p>Parapercis colias (blue cod) is an endemic temperate reef fish that supports an important commercial and recreational fishery in New Zealand. However, concerns have been raised about localized stock depletion, and multiple lines of evidence have suggested P. colias may form several biologically distinct populations within the New Zealand Exclusive Economic Zone. Mark and recapture studies along with otolith and stable isotope studies have indicated that individuals are sedentary with very limited movement beyond the scale of 10-20km. The primary goal of this research was to advance the current knowledge of P. colias population genetic structure. This information can be incorporated into stock assessment models with the aim of improving the management of the P. colias fishery. This study made use of 454 pyrosequencing technology to isolate and develop the first set of microsatellite DNA markers for P. colias. These seven microsatellite loci, along with mitochondrial control region sequences, were used to determine the levels of genetic variation and differentiation between sites around the New Zealand coastline, including the Chatham Islands.  Significant differentiation was observed between the Chatham Islands and mainland New Zealand sample sites, indicating that these two regions form distinct populations. Interpretation of the results for the mainland sites was more complex. Mitochondrial sequence data detected no significant pairwise differentiation between mainland sites, although a pattern of isolation-by-distance was observed. However, evidence for genetic differentiation among mainland sites was weak based on the microsatellite DNA analysis. Although pairwise Gѕт levels were significant in some sites, this was not reflected in principal component analysis or Bayesian structure analysis. It is likely that through long range dispersal, migration is at or above the threshold for genetic connectivity, but below a level necessary for demographic connectivity. This is indicated by both the genetic structure reported here, along with previous studies showing limited dispersal of P. colias.</p>


2016 ◽  
Vol 3 (1) ◽  
pp. 61-65 ◽  
Author(s):  
K. Pocherniayev

Aim. To study the genetic structure of Ukrainian Large White pigs using mitochondrial DNA-markers. Methods. Multiplex PCR-AFLP analysis, remarkable for the investigation of D-loop fragment between posi- tions 15531 and 15959 of the pig mitochondrial genome with one monomorphic 15558W and fi ve polymorphic sites TasI 15580T > C, 15616T > C, 15714T > C, 15758T > C, 15916A > T, was used. The presence or absence of site TasI in the abovementioned positions determines mitochondrial DNA haplotypes, indicated with Latin letters from A to P. Results. Seven mitochondrial DNA haplotypes of different frequency were revealed among Ukrainian Large White pigs. The highest frequency was noted for haplotypes G (0.141), J1 (0.133) and N (0.591), previously described for wild pigs of Belgium, France, Italy (G); wild pigs of Japan and China, Meis- han and Large White breeds (J1) and wild pigs of Japan and China, Berkshire and Large White breeds (N). The frequency for haplotype L (Belgian wild pig and Large White) is 0.022; haplotype A (French wild boar, Mangalica, Duroc) − 0.003; haplotype C (wild pig of France, Belgium, Poland, Israel and Landrace, Welsh breeds) − 0.092. Haplotype B1 (0.019) was revealed in Myrgorod breed, Poltava Meat and Red White Belted breeds, bred on its basis. Conclusions. The haplogroup of mitochondrial DNA of Ukrainian Large White pigs includes seven haplotypes of mitochondrial DNA. Pigs with haplotypes G, J1, N and L may be referred to rep- resentatives of Ukrainian Large White pigs, which did not have introgression of maternal line of other breeds.


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