The Neurochemistry of Pair Bonding

2003 ◽  
Vol 12 (2) ◽  
pp. 49-53 ◽  
Author(s):  
J. Thomas Curtis ◽  
Zuoxin Wang
Keyword(s):  
Related Species ◽  
Comparative Studies ◽  
Bond Formation ◽  
Psychological Disorders ◽  
Human Biology ◽  
Pair Bonding ◽  
Neural Basis ◽  
Closely Related Species ◽  
Social Attachment ◽  
Recent Developments

The formation and maintenance of social attachments are fundamental to human biology. Because deficits in the ability to form such attachments are associated with a variety of psychological disorders, an understanding of the neural basis of social attachment may provide insights into the causes of such disorders. Comparative studies using several closely related species of voles that display different social organizations and behaviors have begun to provide important insights into the neurochemical events underlying social attachment. Here we review recent developments in the study of social attachment, focusing on the roles of specific neurochemical systems in pair-bond formation.

scholarly journals Recent Insights into Mechanisms of Genome Size Change in Plants

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
Corrinne E. Grover ◽  
Jonathan F. Wendel
Keyword(s):  
Genome Size ◽  
Related Species ◽  
Evolutionary Dynamics ◽  
Higher Order ◽  
Size Change ◽  
Closely Related Species ◽  
Genome Size Evolution ◽  
Size Evolution ◽  
Recent Developments

Genome sizes vary considerably across all eukaryotes and even among closely related species. The genesis and evolutionary dynamics of that variation have generated considerable interest, as have the patterns of variation themselves. Here we review recent developments in our understanding of genome size evolution in plants, drawing attention to the higher order processes that can influence the mechanisms generating changing genome size.

Comparative studies on Culex bitaeniorhynchus Giles (1901) and its tenax variant (Diptera: Culicidae) in Chandigarh, India

ENTOMON ◽  
2021 ◽  
Vol 46 (4) ◽  
pp. 293-304
Author(s):  
Rani Ranjana ◽  
Kaur Sandeep ◽  
Kaur Sukhbir ◽  
Kaur Sagandeep
Keyword(s):  
Related Species ◽  
Comparative Studies ◽  
Male Genitalia ◽  
Phenotypic Characteristics ◽  
Closely Related Species ◽  
Intraspecific Variations ◽  
One Way Anova

During present investigations the detailed morphotaxonomic studies of Culex bitaeniorhychus revealed that it exists in two forms i.e typical and tenax in and around Chandigarh. Various intraspecific variations in the morphology and male genitalia were observed in both these forms. The main aim of this study is to distinguish these two forms of Cx. bitaeniorhynchus and their separation from other closely related species. The intraspecific variants of these forms have been studied further with respect to phallosome regions of the male genitalia. For assessing the significant differences among their phenotypic characteristics one–way ANOVA was done along with pair-wise comparisons of samples means. Some of the earlier workers have considered tenax form, a synonym of Cx. infula which is another closely related species of Cx. bitaeniorhynchus. But, on the basis of remarkable differences observed between tenax and infula, it is suggested that these two are separate taxons and should not be synonymised.

scholarly journals A test of altitude-related variation in aerobic metabolism of Andean birds

2021 ◽  
Author(s):  
Gutierrez-Pinto Natalia ◽  
Gustavo A. Londoño ◽  
Mark A. Chappell ◽  
Jay F. Storz
Keyword(s):  
Related Species ◽  
Comparative Studies ◽  
Aerobic Metabolism ◽  
Simple Explanation ◽  
Aerobic Scope ◽  
Closely Related Species ◽  
Related Variation ◽  
Aerobic Exercise Capacity ◽  
Elevational Variation ◽  
Broad Scale

Endotherms at high altitude face the combined challenges of cold and hypoxia. Cold increases thermoregulatory costs, and hypoxia may limit both thermogenesis and aerobic exercise capacity. Consequently, in comparisons between closely related highland and lowland taxa, we might expect to observe consistent differences in basal metabolism (BMR), maximal metabolism (MMR), and aerobic scope. Broad-scale comparative studies of birds reveal no association between BMR and native elevation, and altitude effects on MMR have not been investigated. We tested for altitude-related variation in aerobic metabolism in 10 Andean passerines representing five pairs of closely related species with contrasting elevational ranges. Mass-corrected BMR and MMR were significantly higher in most highland species relative to their lowland counterparts, but there was no uniform elevational trend across all pairs of species. Our results suggest that there is no simple explanation regarding the ecological and physiological causes of elevational variation in aerobic metabolism.

Microsatellite Marker: Importance and Implications of Cross-genome Analysis for Finger Millet (Eleusine coracana (L.) Gaertn)

2020 ◽  
Vol 9 (3) ◽  
pp. 160-170
Author(s):  
Thumadath P.A. Krishna ◽  
Maharajan Theivanayagam ◽  
Gurusunathan V. Roch ◽  
Veeramuthu Duraipandiyan ◽  
Savarimuthu Ignacimuthu
Keyword(s):  
Molecular Marker ◽  
Microsatellite Markers ◽  
Ssr Markers ◽  
Genome Analysis ◽  
Related Species ◽  
Finger Millet ◽  
Crop Improvement ◽  
Human Beings ◽  
Closely Related Species ◽  
Genome Amplification

Finger millet is a superior staple food for human beings. Microsatellite or Simple Sequence Repeat (SSR) marker is a powerful tool for genetic mapping, diversity analysis and plant breeding. In finger millet, microsatellites show a higher level of polymorphism than other molecular marker systems. The identification and development of microsatellite markers are extremely expensive and time-consuming. Only less than 50% of SSR markers have been developed from microsatellite sequences for finger millet. Therefore, it is important to transfer SSR markers developed for related species/genus to finger millet. Cross-genome transferability is the easiest and cheapest method to develop SSR markers. Many comparative mapping studies using microsatellite markers clearly revealed the presence of synteny within the genomes of closely related species/ genus. Sufficient homology exists among several crop plant genomes in the sequences flanking the SSR loci. Thus, the SSR markers are beneficial to amplify the target regions in the finger millet genome. Many SSR markers were used for the analysis of cross-genome amplification in various plants such as Setaria italica, Pennisetum glaucum, Oryza sativa, Triticum aestivum, Zea mays and Hordeum vulgare. However, there is very little information available about cross-genome amplification of these markers in finger millet. The only limited report is available for the utilization of cross-genome amplified microsatellite markers in genetic analysis, gene mapping and other applications in finger millet. This review highlights the importance and implication of microsatellite markers such as genomic SSR (gSSR) and Expressed Sequence Tag (EST)-SSR in cross-genome analysis in finger millet. Nowadays, crop improvement has been one of the major priority areas of research in agriculture. The genome assisted breeding and genetic engineering plays a very crucial role in enhancing crop productivity. The rapid advance in molecular marker technology is helpful for crop improvement. Therefore, this review will be very helpful to the researchers for understanding the importance and implication of SSR markers in closely related species.

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