scholarly journals Isozyme variation and genetic relatedness among natural populations of Pleurotus ostreatus.

1995 ◽  
Vol 41 (6) ◽  
pp. 487-497 ◽  
Author(s):  
TERUYUKI MATSUMOTO ◽  
KIMITO MIMURA ◽  
YUKITAKA FUKUMASA-NAKAI
Keyword(s):  
Pleurotus Ostreatus ◽  
Genetic Relatedness ◽  
Natural Populations ◽  
Isozyme Variation

scholarly journals Benefit of transferred mutations is better predicted by the fitness of recipients than by their ecological or genetic relatedness

2016 ◽  
Vol 113 (18) ◽  
pp. 5047-5052 ◽  
Author(s):  
Yinhua Wang ◽  
Carolina Diaz Arenas ◽  
Daniel M. Stoebel ◽  
Kenneth Flynn ◽  
Ethan Knapp ◽  
...  
Keyword(s):  
Genetic Relatedness ◽  
Natural Populations ◽  
Donor Strain ◽  
Fitness Effect ◽  
Beneficial Mutations ◽  
E Coli ◽  
Experimental Systems ◽  
Natural Isolates ◽  
Selection Of ◽  
New Mutations

The effect of a mutation depends on its interaction with the genetic background in which it is assessed. Studies in experimental systems have demonstrated that such interactions are common among beneficial mutations and often follow a pattern consistent with declining evolvability of more fit genotypes. However, these studies generally examine the consequences of interactions between a small number of focal mutations. It is not clear, therefore, that findings can be extrapolated to natural populations, where new mutations may be transferred between genetically divergent backgrounds. We build on work that examined interactions between four beneficial mutations selected in a laboratory-evolved population of Escherichia coli to test how they interact with the genomes of diverse natural isolates of the same species. We find that the fitness effect of transferred mutations depends weakly on the genetic and ecological similarity of recipient strains relative to the donor strain in which the mutations were selected. By contrast, mutation effects were strongly inversely correlated to the initial fitness of the recipient strain. That is, there was a pattern of diminishing returns whereby fit strains benefited proportionally less from an added mutation. Our results strengthen the view that the fitness of a strain can be a major determinant of its ability to adapt. They also support a role for barriers of transmission, rather than differential selection of transferred DNA, as an explanation of observed phylogenetically determined patterns of restricted recombination among E. coli strains.

The number and distribution of incompatibility factors in natural populations of Pleurotus ostreatus and Pleurotus sapidus

1991 ◽  
Vol 69 (10) ◽  
pp. 2187-2191 ◽  
Author(s):  
Neil A. Anderson ◽  
Glenn R. Furnier ◽  
Andrew S. Wang ◽  
John W. Schwandt
Keyword(s):  
Population Genetics ◽  
Mating System ◽  
Key Words ◽  
Pleurotus Ostreatus ◽  
Small Area ◽  
Spatial Clustering ◽  
Natural Populations ◽  
Single Spore ◽  
Single Tree ◽  
Pleurotus Sapidus

Pairings of single-spore isolates from different basidiocarps were made to examine the numbers and distributions of incompatibility factors in the tetrapolar basidiomycetes Pleurotus ostreatus and Pleurotus sapidus. These factors do not appear to be randomly distributed, with multiple basidiocarps on a single tree or log arising from a single mycelium, multiple basidiocarps on a single tree or log sharing a single common monokaryotic parent, and a tendency toward spatial clustering of factors even when multiple basidiocarps from the same tree or log are excluded from the analyses. For one 30-km2 collection area, the estimated numbers of A and B factors in the P. ostreatus population were 126 and 354, respectively, yielding an estimated outbreeding efficiency of 0.99. Estimated outbreeding efficiencies were quite high [Formula: see text] even in a sample taken from a very small area (0.09 m2), illustrating the ability of the tetrapolar mating system to simultaneously prevent self mating and minimize the number of incompatible matings. Key words: Basidiomycotina, fungi, mating system, population genetics.

scholarly journals Isozyme variation in natural populations

1971 ◽  
Vol 18 (1) ◽  
Author(s):  
M. M. Reddy ◽  
S. F.H. Threlkeld
Keyword(s):  
Natural Populations ◽  
Isozyme Variation

ISOZYME VARIATION IN NATURAL POPULATIONS OFDROSOPHILA BUZZATII

Evolution ◽  
1976 ◽  
Vol 30 (2) ◽  
pp. 213-233 ◽  
Author(s):  
J. S. F. Barker ◽  
J. C. Mulley
Keyword(s):  
Natural Populations ◽  
Isozyme Variation

Isozyme Variation in Natural Populations of Drosophila buzzatii

Evolution ◽  
1976 ◽  
Vol 30 (2) ◽  
pp. 213 ◽  
Author(s):  
J. S. F. Barker ◽  
J. C. Mulley
Keyword(s):  
Natural Populations ◽  
Isozyme Variation ◽  
Drosophila Buzzatii

scholarly journals GENETIC VARIATION OF FRUIT TRAITS AMONG NATURAL POPULATIONS OF TERMINALIA PANICULATA ROTHIN SOUTHERN WESTERN GHATS, PENINSULAR INDIA

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Sanal C. Viswanath ◽  
Sinny Francis ◽  
Jijesh CM ◽  
Hrideek T. K
Keyword(s):  
Western Ghats ◽  
Genetic Relatedness ◽  
Wing Length ◽  
Natural Populations ◽  
Fruit Traits ◽  
Peninsular India ◽  
Reconnaissance Survey ◽  
Wing Width ◽  
Southern Western Ghats ◽  
Terminalia Paniculata

A reconnaissance survey was conducted in Southern Western Ghats, India to identify the wild populations of Terminalia paniculata. From the explorative survey, 16 natural populations from different localities of the study area were identified. Collected 36 fruits from each tree and fruit trait quantification of total 3456 fruits (36 x 16 x 6) from 16 populations were used for the study. Hierarchical clustering of selected populations and correlations among fruit traits and between tree traits and fruit traits visualised using a dendrogram. The results indicated significant differences in fruit traits like fruit fresh mass, fruit large wing length and fruit large wing width. Clustering of fruit characters for all the accessions revealed the genetic relatedness between accessions. It reveals that selected populations of T. paniculata belong to two major clusters and confirms that 16 populations are either adjacent or distant in-terms of fruit traits are independent of the geographical station. The relationship between fruit traits indicates a significant positive correlation between fruit traits ranging from 0.352 to 0.739. Even though fruit traits show significant correlation within, a non-significant and very week correlation was obtained with tree stand-up traits except tree girth with fruit large wing length (21.4 %).

Genetic Studies in the Genus Basidiobolus. I. Isozyme Variation among Isolates of Human and Natural Populations

Mycologia ◽  
1989 ◽  
Vol 81 (4) ◽  
pp. 504 ◽  
Author(s):  
Bruce J. Cochrane ◽  
Jill K. Brown ◽  
Richard P. Wain ◽  
Bienvenido G. Yangco ◽  
Diane Te Strake
Keyword(s):  
Natural Populations ◽  
Isozyme Variation ◽  
Genetic Studies
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