Variation in nuclear DNA base composition (mol% G + C) in three orders of marine green algae

1990 ◽  
pp. 167-172 ◽  
Author(s):  
D. Wilson Freshwater ◽  
Julie A. Dutcher ◽  
Donald F. Kapraun ◽  
Ronald K. Sizemore
Keyword(s):  
Green Algae ◽  
Base Composition ◽  
Nuclear Dna ◽  
Dna Base Composition ◽  
Dna Base

Variation in nuclear DNA base composition (mol % G + C) in three orders of marine green algae

Hydrobiologia ◽  
1990 ◽  
Vol 204-205 (1) ◽  
pp. 167-172 ◽  
Author(s):  
D. Wilson Freshwater ◽  
Julie A. Dutcher ◽  
Donald F. Kapraun ◽  
Ronald K. Sizemore
Keyword(s):  
Green Algae ◽  
Base Composition ◽  
Nuclear Dna ◽  
Dna Base Composition ◽  
Dna Base

Tetrapisispora namnaonensis sp. nov., a novel ascomycetous yeast species isolated from forest soil of Nam Nao National Park, Thailand

2005 ◽  
Vol 55 (4) ◽  
pp. 1735-1738 ◽  
Author(s):  
Tawatchai Sumpradit ◽  
Savitree Limtong ◽  
Wichien Yongmanitchai ◽  
Hiroko Kawasaki ◽  
Tatsuji Seki
Keyword(s):  
National Park ◽  
Base Composition ◽  
Nuclear Dna ◽  
Yeast Species ◽  
Large Subunit ◽  
Lsu Rdna ◽  
Dna Base Composition ◽  
Ascomycetous Yeast ◽  
Dna Base ◽  
D2 Domain

Twenty-one strains of a novel ascomycetous yeast species were isolated from soil collected in three kinds of natural forest, namely a dry dipterocarp forest, a mixed deciduous forest and a pine forest, in Nam Nao National Park, Phetchabun province, Thailand. The strains formed asci containing one to four ovoid to reniform ascospores, assimilated glucose, galactose and glycerol, fermented glucose and galactose vigorously and contained ubiquinone Q-6, indicating that they belonged to the genus Tetrapisispora. A comparative analysis of the small subunit rDNA (SSU rDNA) and the D1/D2 domain of the large subunit rDNA (LSU rDNA) of all available sequences for ascomycetous yeasts confirmed that the strains were phylogenetically related to the genus Tetrapisispora. All strains had identical nucleotide sequences in the D1/D2 domain of the LSU rDNA and differed from the nearest species, Tetrapisispora arboricola IFO 10925T, by 6·4 % nucleotide substitutions. The strains differed from Tetrapisispora arboricola by the ability to assimilate d-gluconic acid, the inability to grow on 50 % glucose medium, the nuclear DNA base composition and deliquescent asci. The strains were differentiated from the other four species of Tetrapisispora on the basis of trehalose assimilation, the ability to grow on 50 % glucose or 10 % NaCl plus 5 % glucose, vitamin requirement, the nuclear DNA base composition and the type of ascus. Based on the characteristics mentioned above, the strains are recognized as a single novel species of the genus Tetrapisispora and the name Tetrapisispora namnaonensis sp. nov. is proposed. The type strain is TN1-01T (=TISTR 5828T=JCM 12664T=CBS 10093T).

Mutants with altered DNA base composition inBacterium paracoli — the evidence from a marker

1971 ◽  
Vol 11 (2) ◽  
pp. 91-95 ◽  
Author(s):  
G. F. Gause ◽  
A. V. Laiko ◽  
M. V. Bibikova ◽  
L. I. Kusovkova ◽  
T. I. Selesneva ◽  
...  
Keyword(s):  
Base Composition ◽  
Dna Base Composition ◽  
Dna Base

DNA base composition heterogeneity in some agarophytes (Gracilariales, Rhodophyta) from Mexico and the Philippines

1996 ◽  
Vol 8 (3) ◽  
pp. 229-237 ◽  
Author(s):  
Donald F. Kapraun ◽  
Juan Lopez-Bautista ◽  
Kimon T. Bird
Keyword(s):  
Base Composition ◽  
The Philippines ◽  
Dna Base Composition ◽  
Dna Base

William Bateson, Richard Goldschmidt, and Non-Genic Modes of Speciation

2003 ◽  
Vol 11 (04) ◽  
pp. 341-350 ◽  
Author(s):  
D. R. Forsdyke
Keyword(s):  
New Species ◽  
Base Composition ◽  
Hybrid Sterility ◽  
Parental Factors ◽  
Dna Base Composition ◽  
William Bateson ◽  
Dna Base ◽  
Negative Effect ◽  
Positive Effect ◽  
Richard Goldschmidt

Sometimes a cross between two individuals that appear to belong to the same species produces a sterile offspring (i.e., their hybrid is sterile). Thus, the two individuals appear reproductively isolated from each other. If each could find a compatible mate, then new species might emerge. At issue is whether the form of hybrid sterility that precedes sympatric differentiation into species is, in the general case, of genic or non-genic origin. Several recent papers lend the authority of William Bateson to the genic hypothesis, referring to the "Bateson–Dobzhansky–Muller hypothesis". All these papers cite a 1996 paper that, in turn, cites a 1909 paper of Bateson. However, from 1902 until 1926 the latter espoused a non-genic hypothesis that today would be classified as "chromosomal". Analysis of Bateson's 1909 text reveals no recantation. Bateson's non-genic view was similar to that advanced by Richard Goldschmidt in the 1940s. However, Bateson proposed a contribution from parents of abstract factors that, together in their hybrids, complement to bring about a negative effect (hybrid sterility). In contrast, Goldschmidt proposed that normally parents contribute complementary factors making parental chromosomes compatible at meiosis in their hybrids, which hence are fertile (i.e., the parental factors work together to produce a positive effect). When the factors are not sufficiently complementary the parental chromosomes are incompatible in their hybrids, which hence are sterile. The non-genic Batesonian–Goldschmidtian abstractions are now being fleshed-out chemically in terms of DNA base-composition differences.

scholarly journals Cell wall, DNA base composition and lipid studies onListeria denitrificans(Prevot)

1983 ◽  
Vol 18 (1-2) ◽  
pp. 131-134 ◽  
Author(s):  
Matthew David Collins ◽  
Sara Feresu ◽  
Dorothy Jones
Keyword(s):  
Cell Wall ◽  
Base Composition ◽  
Dna Base Composition ◽  
Dna Base
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