Molecular Diversity Assessment: Logarithmic Relations of Information and Species Diversity and Logarithmic Relations of Entropy and Indistinguishability after Rejection of Gibbs Paradox of Entropy of Mixing

Molecules ◽  
1996 ◽  
Vol 1 (4) ◽  
pp. 57-67 ◽  
Author(s):  
Shu-Kun Lin
Genetika ◽  
2013 ◽  
Vol 45 (2) ◽  
pp. 527-536 ◽  
Author(s):  
N.B. Singh ◽  
S. Joshi ◽  
P. Choudhary ◽  
J.P. Sharma

Around 100 clones of tree willows were subjected for nursery screening twice on morphometric traits. Genetic diversity was assessed in twenty-five genetically superior willow clones hailing from six countries using 16 SSR primers. Fourteen primers amplified the DNA but only ten showed polymorphism. Total 34 bands were scored, out of that 27 were found to be polymorphic and 7 were monomorphic. Three primers showed 100% polymorphism whereas 79.4% polymorphism was recorded in total. The dendrogram obtained from SSR markers revealed that clone SE-69-002 (S. matsudana) and NZ-1040 (S. matsudana X S. alba) as most similar clones (Jaccards coefficient of 0.97), and clone PN-721(S. matsudana X S. alba) and PN-731 (S. nigra), as most divergent clones (Jaccards coefficient of 0.63). All the genotypes were grouped into 4 distinct clusters. On the basis of similarity coefficient analysis the first cluster comprised of 11 genotypes, the second cluster have 8 genotypes where as third one has only one genotype and fourth cluster retained five genotypes. The clustering pattern further indicated that the geographic distribution may not be the reflection of genetic diversity in willow clones. Genotypes with high molecular diversity could be used in breeding programme in order to obtain heterotic hybrids and development of gene pools with broad genetic base. The genotype specific bands developed by the SSR primers could also be used for identification of cultivar.


2018 ◽  
Vol 10 (4) ◽  
pp. 597-606
Author(s):  
Umeshkumar L. TIWARI ◽  
Kaliamoorthy RAVIKUMAR

The study deals with the floristic diversity assessment and vegetation composition analysis in various forest types from Hosur Forest division situated in Eastern Ghats of Southern India, in the state of Tamil Nadu. The study recorded 468 species of plants belonging to 283 genera and 91 families, including Angiosperms (464 species), Pteridophytes (3 species) and Bryophytes (1 species). Of the total, 94 species are trees, 12 are lianas, 70 are shrubs, 34 species are climbers, 194 species are herbs, sedges 7, grasses 21, ferns 3 and 1 species of moss. The five most abundant families in Hosur Forest Division were Fabaceae (45 spp.), Poaceae (34 spp.), Acanthaceae (30 spp.), Euphorbiaceae (28 spp.) and Rubiaceae (25 spp.). The quantitative features such as density and important value index (IVI) varied greatly among forest and in different forest types. In the present study, the diversity index of shrubs and herbs were found to be higher than that of trees. The maximum species diversity was recorded in Southern dry mixed deciduous forest (SDMDF) followed by Southern Thorn Forest (STF) and Southern Thorn Scrub (STS). The species diversity (H) was recorded the highest for SDMDF (5.61) followed by STF (5.18) and the lowest for STS (5.12). The presence of large number of higher girth class tree species and low number of sapling and seedling indicates that the present forests investigated are old and exhibiting low regeneration.


2009 ◽  
Vol 59 (2) ◽  
pp. 149-157 ◽  
Author(s):  
Prakit Somta ◽  
Warunee Sommanas ◽  
Peerasak Srinives

Scientifica ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Ruhana Hassan ◽  
Muhammad Nur Arif Othman ◽  
Mohd Nasarudin Harith ◽  
Amir Shah Ruddin Md Sah

Gracilaria red algae are notable for their economic importance as agrophytes, sold as salad vegetable, and used as the base for selected food and nonalcoholic beverages. A wild population of Gracilaria exists in coastal areas of Sarawak, Malaysian Borneo, but there is only limited knowledge on species diversity and its abundance leaving the untapped economic potential of this resource. This study was carried out to determine diversity of wild Gracilaria populations in Lawas, Santubong, and Asajaya, Sarawak, using the combination of morphological character examination and 5′ region of the mitochondrial cytochrome c oxidase 1 (CO1-5P) gene analysis. Identification of the species using morphological characters revealed three species, namely, Gracilaria changii, G. blodgettii, and G. arcuata, had been collected from the sampling sites. However, based on 672 bp CO1-5P gene sequence analysis, all the three species were identified as G. blodgettii; besides, low genetic divergence values (0.17%–0.34%) were scored between samples in this study with the same species in GenBank. In the phylogenetic trees, all samples in this study group together with other G. blodgettii have high bootstrap values; thus, this species is monophyletic. This study implies that species identification of Gracilaria and other seagrass taxa which have a phenotypic plasticity problem should include the CO1-5P gene analysis as it is a reliable gene marker for species diversity assessment.


2013 ◽  
Vol 15 (1) ◽  
pp. 277-295 ◽  
Author(s):  
Salem Alghamdi ◽  
Altaf Khan ◽  
Megahed Ammar ◽  
Ehab El-Harty ◽  
Hussein Migdadi ◽  
...  

1985 ◽  
Vol 62 (1) ◽  
pp. 47 ◽  
Author(s):  
H. R. Kemp

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