International Journal of Trend in Scientific Research and Development

Attempts were made to develop a technique to rear the phyllosoma larvae of Panulirus homarus. The biological characters like fecundity, hatching percentage, larval morphological changes, feed inputs and moulting frequency till the fourth moult were studied. Morphometric and meristic characters of the larvae were also studied till the 42ndday. The larval output was directly proportional to the size of the gravid brood stock. Relationship between the duration of culture X and length of the larvae Y were shown by the relationships Y intercept = 0.5780 ± 0.1074 and X intercept = 0.7283 r2 = 0.8519 . There was significant p 0.0001 positive relationship between total length TL and carapace width CW of phyllosoma larvae. 

Intervertebral disc diseases is otherwise known as breakdown of one or more discs that separate the bone of the spine, Which cause pain in the back, neck as well as frequent pain in legs and arms. The general role of intervertebral discs is to provide the cushioning between vertebrae and absorb the pressure that is exerted on the spine. Generally low back pain LBP is considered as common disorder from disc degenerative diseases. The main reason of the LBP is due to contribution of intervertebral disc diseases and combination of genetic and environmental factors. Most of these factor identified , But some of these remain unidentified. However recent researches identified that variations in several genes may influence the risc of intervertebral disc diseases . Most of the variations associated with genes related with immune function leads to increase risk of intervertebral disc diseases . Most of these genes plays a vital role in immune response like inflammation and water loss dehydration of the discs, Which causes their degener

ation. This review focuses on the evidence of genetic disposition, the genes or biological processes that are implicated, and the need to consolidate resources and clarify phenotype definition to take advantage of the new technologies in genetic analysis to enhance our understanding of this condition. 

The blossom midge C. maculipennis, a serious pest in orchids which infests blooms and mainly hampered the cut flower production have been newly found in Tamil Nadu in recent years. Those infesting the flower buds of Dendrobium spp. (Orchidaceae) was identified, on the basis of morphological key characters and further, the identity of midge specimen was confirmed through molecular techniques with mitochondrial Cytochrome Oxidase subunit I (COI) gene specific primers, as C. maculipennis. The COI sequence of Contarinia species was closely (100% similarities) related with already sequenced C. maculipennis with 678 bp. Dendrobium spp. is newly regarded as one of the host plants of C. maculipennis. 

By M. Jayasheelan | L. Allwin | G. Preetha | K. Elanchezhyan" New Host Record of Blossom Midge, Contarinia maculipennis (Felt) (Cecidomyiidae: Diptera) in Tamil Nadu, India" 

The development of DNA technologies within the framework of the concept of gene marker selection allows us to evaluate animals by allelic variants of genes, directly or indirectly related to productive features. The authors study the polymorphism of the POU1F1 gene and its relation to the milk productivity of Holstein breed cows. 

As part of the study the samples of biological materials were taken from 50 animals, commercial sets were used to isolate genomic DNA, and polymorphism was analyzed according to a standard procedure. 

The results of the studies showed that the polymorphism of the POU1F1 gene has a significant effect on the average daily yield of milk yield and milk yield for 305 days of lactation in Holstein breed cows. The authors also found out that alleles, but not genotypes, have the greatest influence on the symptoms. 

The conducted studies allow to suggest that the diagnosis of allelic variants of the POU1F1 gene can be used in practical work to select heifers genetically predisposed to the highest milk yields. 

by Ward M. Ashraf | Abuargob M. Omry | Hdud M. Ismail | Elgusbi M. Tarek | Ruban Y. Sergey""Molecular-genetic aspects of the POU 1 F 1 gene in Holstein reproductive traits" 

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-3 , April 2018,