Isozyme Variation and Genetic Structure of Populations of Avena barbata from Argentina

2006 ◽  
Vol 53 (3) ◽  
pp. 587-601 ◽  
Author(s):  
Irma-Rosana Guma ◽  
Marcelino Pérez de la Vega ◽  
Pedro García
Keyword(s):  
Genetic Structure ◽  
Isozyme Variation ◽  
Avena Barbata ◽  
Genetic Structure Of Populations

Genetic Relationships of Cory's Shearwater: Parentage, Mating Assortment, and Geographic Differentiation Revealed by DNA Fingerprinting

The Auk ◽  
2000 ◽  
Vol 117 (3) ◽  
pp. 651-662 ◽  
Author(s):  
Corinne Rabouam ◽  
Vincent Bretagnolle ◽  
Yves Bigot ◽  
Georges Periquet
Keyword(s):  
Genetic Variation ◽  
Genetic Structure ◽  
Dna Fingerprinting ◽  
Genetic Relatedness ◽  
Isolation By Distance ◽  
Genetic Relationships ◽  
Cory’S Shearwater ◽  
Genetic Structure Of Populations ◽  
The Social ◽  
Calonectris Diomedea

Abstract We used DNA fingerprinting to assess genetic structure of populations in Cory's Shearwater (Calonectris diomedea). We analyzed mates and parent-offspring relationships, as well as the amount and distribution of genetic variation within and among populations, from the level of subcolony to subspecies. We found no evidence of extrapair fertilization, confirming that the genetic breeding system matches the social system that has been observed in the species. Mates were closely related, and the level of genetic relatedness within populations was within the range usually found in inbred populations. In contrast to previous studies based on allozymes and mtDNA polymorphism, DNA fingerprinting using microsatellites revealed consistent levels of genetic differentiation among populations. However, analyzing the two subspecies separately revealed that the pattern of genetic variation among populations did not support the model of isolation by distance. Natal dispersal, as well as historic and/or demographic events, probably contributed to shape the genetic structure of populations in the species.

scholarly journals Genetic structure of populations of Legionella pneumophila.

1985 ◽  
Vol 163 (3) ◽  
pp. 1021-1037 ◽  
Author(s):  
R K Selander ◽  
R M McKinney ◽  
T S Whittam ◽  
W F Bibb ◽  
D J Brenner ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Legionella Pneumophila ◽  
Genetic Structure Of Populations

Genetic structure of populations of Calomys laucha (muridae, sigmodontinae) from central Argentina

2002 ◽  
Vol 30 (11) ◽  
pp. 1023-1036 ◽  
Author(s):  
Marina B. Chiappero ◽  
Antonio Blanco ◽  
Gladys E. Calderón ◽  
Marta S. Sabattini ◽  
Cristina N. Gardenal
Keyword(s):  
Genetic Structure ◽  
Central Argentina ◽  
Genetic Structure Of Populations ◽  
Calomys Laucha

scholarly journals Genetic Analyses of the Laurel Wilt Pathogen, Raffaelea lauricola, in Asia Provide Clues on the Source of the Clone that is Responsible for the Current USA Epidemic

Forests ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 37 ◽  
Author(s):  
Tyler J. Dreaden ◽  
Marc A. Hughes ◽  
Randy C. Ploetz ◽  
Adam Black ◽  
Jason A. Smith
Keyword(s):  
Genetic Structure ◽  
Laurel Wilt ◽  
Type Locus ◽  
Xyleborus Glabratus ◽  
Genetic Structure Of Populations ◽  
Raffaelea Lauricola ◽  
Host Trees ◽  
Redbay Ambrosia Beetle ◽  
The Usa ◽  
Simple Sequence

Laurel wilt is caused by the fungus Raffaelea lauricola T.C. Harr., Fraedrich and Aghayeva, a nutritional symbiont of its vector the redbay ambrosia beetle, Xyleborus glabratus Eichhoff. Both are native to Asia but appeared in Georgia in the early 2000s. Laurel wilt has since spread to much of the southeastern United States killing >300 million host trees in the Lauraceae plant family. The aims of this research were to elucidate the genetic structure of populations of R. lauricola, to examine its reproductive strategy, and determine how often the pathogen had been introduced to the USA. A panel of 12 simple sequence repeat (SSR) markers identified 15 multilocus genotypes (MLGs) in a collection of 59 isolates from the USA (34 isolates), Myanmar (18), Taiwan (6) and Japan (1). Limited diversity in the USA isolates and the presence of one MAT idiotype (mating type locus) indicated that R. lauricola was probably introduced into the country a single time. MLG diversity was far greater in Asia than the USA. Only three closely related MLGs were detected in the USA, the most prevalent of which (30 of 34 isolates) was also found in Taiwan. Although more work is needed, the present results suggest that a Taiwanese origin is possible for the population of R. lauricola in the USA. Isolates of R. lauricola from Myanmar were distinct from those from Japan, Taiwan and the USA. Although both MAT idiotypes were present in Myanmar and Taiwan, only the population from Taiwan had the genetic structure of a sexually reproducing population.

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