Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2
Anil Kumar,
Subbugan Ganesh,
M. K. Mishra
Issue:
Volume 1, Issue 1, December 2013
Pages:
1-5
Received:
2 October 2013
Published:
10 November 2013
Abstract: Coffee possesses normal sexual propagation behaviour and exhibits various characters in a large population. The work on the extent of variation is very limited and not well understood. In this context a study was undertaken during 2008-2011 to study the monohybrid segregation pattern in 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 in the year 2002. The results revealed that coffee varieties grown under Indian conditions possessed dependent and independent characters. The dependent characters followed the independent assortment along with closely associated characters and expressed the phenotypes to varying degrees. Therefore, the frequency of occurrence of such phenotypes did not match with the expected frequency of these characters at high probability confidence level. The genetic behavior of independent traits exhibited the genetic segregation in accordance with the Mendel’s law of segregation and fit in to the monohybrid ratio of 3:1 and 1:2:1 with high level of hypothetical 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 primary numbers and short primary length characters were found to be dominant over tall type bush, thick main stem and primary shoot as well as more number and length of primary shoots.
Abstract: Coffee possesses normal sexual propagation behaviour and exhibits various characters in a large population. The work on the extent of variation is very limited and not well understood. In this context a study was undertaken during 2008-2011 to study the monohybrid segregation pattern in F2 population of C. arabica cv. ‘Cauvery’x (C. congensis x C. ...
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Zebrafish: An in Vivo Model for the Study of Human Diseases
Bibhas Kar,
Sivamani Subbiah
Issue:
Volume 1, Issue 1, December 2013
Pages:
6-11
Received:
20 September 2013
Published:
10 November 2013
Abstract: The zebrafish (Danio rerio) is a powerful model organism for the study of vertebrate biology, being well suited to both developmental and genetic analysis. More recently, the rapid progress of various zebrafish genomics infrastructure initiatives is facilitating the development of zebrafish models of human disease. Genome organization and the pathways involved into control of signal transduction appear to be highly conserved between zebrafish and humans and therefore zebrafish may be used for modeling of human diseases. This review will highlight and describe the utility of zebrafish in the study of human diseases.
Abstract: The zebrafish (Danio rerio) is a powerful model organism for the study of vertebrate biology, being well suited to both developmental and genetic analysis. More recently, the rapid progress of various zebrafish genomics infrastructure initiatives is facilitating the development of zebrafish models of human disease. Genome organization and the pathw...
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