Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species-Part 1
Anil Kumar,
Subbugan Ganesh
Issue:
Volume 1, Issue 5, October 2013
Pages:
55-61
Received:
25 July 2013
Published:
20 September 2013
Abstract: Mating of two parental varieties always leads to the production of genotypic admixture of both the parental traits in F1 and on selfing the progeny exhibits the phenotypic segregation in a definite proportion in F2. Mendel described it as “Law of Independent Assortment”. It is general belief that coffee varieties do not follow the Mendel’s ratios of segregation. Keeping in view the above findings and beliefs, a study was undertaken during 2008-2011 to observe the segregation pattern in the F2 population of C. arabica cv. ‘Cauvery’ x (C. congensis x C. canephora var. robusta) established at Coffee Research Sub Station, Chettalli, Kodagu District, Karnataka, India in the year 2002. The results of the study revealed that coffee cultivars of commercial importance possessed two types of genetic traits known as dependent and independent characters. The dependent characters showed assortment of characters along with closely related characters and expressed varying degrees of expression. Therefore, the frequency of the occurrence of such phenotypic traits did not considerably match with the expected frequency of the same traits at high probability level and it matched at low probability. The genetic behavior of independent traits exhibited genetic segregation in accordance with the Mendel’s law of independent assortment showing goodness of fit to the dihybrid ratio of 9:3:3:1 with high level of statistical confidence (P≥0.50 up to 0.95). It was observed that the genes regulating the dwarfing effect for coffee bush, thin stem and primary girth, low number of primary branches and reduced length of primary branches were dominant over tall type bush, thick main stem and primary shoot as well as higher number and length of primary shoots.
Abstract: Mating of two parental varieties always leads to the production of genotypic admixture of both the parental traits in F1 and on selfing the progeny exhibits the phenotypic segregation in a definite proportion in F2. Mendel described it as “Law of Independent Assortment”. It is general belief that coffee varieties do not follow the Mendel’s ratios o...
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Computational Prediction of miRNA in Gmelina Arborea and their Role in Human Metabolomics
Alka Dubey,
Swinderjeet Singh Kalra,
Nandita Trivedi
Issue:
Volume 1, Issue 5, October 2013
Pages:
62-74
Received:
26 August 2013
Published:
30 September 2013
Abstract: Micro RNA are the noncoding class of RNA which plays major role post transcriptional regulation of genes and 19-22 nt in length and endogenous in nature .In this study miRNA Gmelina arborea are predicted along with possible target genes , A total of 44 ESTs are taken from dbEST database and proceed and trimmed through EGassembler. This contig sequence was now used to find out the putative miRNA by performing a local alignment with miRNA of Arabidopsis thaliana retrieved from miRBase. The targets were scanned by hybridizing screened ESTs with the UTRs of human using DIANA tar software. Finally 6 putative miRNAs were found to hybridize with the various targets of signal transduction and apoptosis that play significant role in preventing disease like cancer, blood borne disease, and other urinary infections and various study indicated that is possesses antioxidants, diuretic, anthelmintic activity, cardio protective, anti diabetic, immunomodulatory, antipyretic and analgesic, antimicrobial in the treatment of jaundice, piles bases on their targets
Abstract: Micro RNA are the noncoding class of RNA which plays major role post transcriptional regulation of genes and 19-22 nt in length and endogenous in nature .In this study miRNA Gmelina arborea are predicted along with possible target genes , A total of 44 ESTs are taken from dbEST database and proceed and trimmed through EGassembler. This contig sequ...
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