Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2

Anil Kumar; Subbugan Ganesh; M. K. Mishra

doi:doi:10.11648/j.ijgg.20130101.11

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Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2

Anil Kumar, Subbugan Ganesh, M. K. Mishra

Published in International Journal of Genetics and Genomics (Volume 1, Issue 1)

Received: 2 October 2013 Published: 10 November 2013

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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.

Published in	International Journal of Genetics and Genomics (Volume 1, Issue 1)
DOI	10.11648/j.ijgg.20130101.11
Page(s)	1-5
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2013. Published by Science Publishing Group

Keywords

Genetic Segregation, Variability, Inter-Specific Hybrids, Dominant Traits, Monohybrid Ratio

References

[1]	C. A. Krug, J. E. T. Mendes, A. Carvalho and A. J. T. Mendes, "A new type of coffee" Bragantia,1950, vol. 10, (1): pp. 11-25. [In Portuguese, English summary.]
[2]	C. A. Krug and A. Carvalho,. "The genetics of coffee, Advances in Genetics", 1951, vol, 4, pp.127-68
[3]	C. A. Krug, and A. J. T. Mendes, "Cytological observations in Coffea – IV", J Genet, 1940, vol. 39, pp. 189–203
[4]	G. Wrigley, Coffee: Tropical Agriculture Series London. John Wily & Son, Inc., New York, U.S.A. 1988, pp.639
[5]	A. Santaram, "New dimension in understanding inheritance of coffee rust resistance", ASIC, 16th International Conference on Coffee Science, Kyoto, 1995, pp. 842-850.
[6]	H. A. M. Van der Vossen, "Coffee selection and breeding. In-Coffee, botany, biochemistry and production of beans and beverage", M.N. Clifford, K.C. Willsons (eds.) Crom Helm Ltd, 1985, pp. 48-96.
[7]	C.S. Srinivasan, A. Kumar, V.S. Amaravenmathy, A. Santaram, "Robusta-like Coffee Plants with Arabica-like Cup Quality- Myth or Possibility?". ASIC, 20th International Conference on Coffee Science Bangalore, 2004, pp. 787-799
[8]	M.S. Sreenivasan, A. Santa Ram and N.S. Prakash., "Tetraploid inter-specific hybrids in Coffee breeding in India". ASIC,15th Colloque, Montpellier, 1993, pp. 226-233
[9]	R.L. Narsimhaswamy, and S. Vishveshwara, "Report on hybrids between some diploid species of Coffea L". Indian Coffee, 1961, 25 : pp. 101-111
[10]	R.L. Narsimhaswamy, and S. Vishveshwara,. "Progress report on hybrids between diploid species of Coffea L." Turrialba, 1967, 17: pp. 11-17
[11]	C.C. Chinnappa, "Interspecific hybrids of Coffea canephora and Coffea Arabica". Curr Sci, 1968, 37: pp. 676–677.

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Anil Kumar, Subbugan Ganesh, M. K. Mishra. (2013). Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2. International Journal of Genetics and Genomics, 1(1), 1-5. https://doi.org/10.11648/j.ijgg.20130101.11

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ACS Style

Anil Kumar; Subbugan Ganesh; M. K. Mishra. Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2. Int. J. Genet. Genomics 2013, 1(1), 1-5. doi: 10.11648/j.ijgg.20130101.11

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Anil Kumar, Subbugan Ganesh, M. K. Mishra. Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2. Int J Genet Genomics. 2013;1(1):1-5. doi: 10.11648/j.ijgg.20130101.11

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@article{10.11648/j.ijgg.20130101.11,
  author = {Anil Kumar and Subbugan Ganesh and M. K. Mishra},
  title = {Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2},
  journal = {International Journal of Genetics and Genomics},
  volume = {1},
  number = {1},
  pages = {1-5},
  doi = {10.11648/j.ijgg.20130101.11},
  url = {https://doi.org/10.11648/j.ijgg.20130101.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijgg.20130101.11},
  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.},
 year = {2013}
}

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TY - JOUR
T1 - Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2
AU - Anil Kumar
AU - Subbugan Ganesh
AU - M. K. Mishra
Y1 - 2013/11/10
PY - 2013
N1 - https://doi.org/10.11648/j.ijgg.20130101.11
DO - 10.11648/j.ijgg.20130101.11
T2 - International Journal of Genetics and Genomics
JF - International Journal of Genetics and Genomics
JO - International Journal of Genetics and Genomics
SP - 1
EP - 5
PB - Science Publishing Group
SN - 2376-7359
UR - https://doi.org/10.11648/j.ijgg.20130101.11
AB - 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.
VL - 1
IS - 1
ER -

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Author Information

Anil Kumar

Regional Coffee Research Station, Coffee Board, Narsipatnam, Visakhapatnam District, Andhra Pradesh, India
Subbugan Ganesh

Faculty of Agriculture and Animal husbandry, Gandhigram Rural University, Gandhigram, Dindigul District, Tamil Nadu, India
M. K. Mishra

Division of Plant Breeding and Genetics, central Coffee Research Institute, CRS Post-577 117, Chikmagalur District, Karnataka, India

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APA Style

Anil Kumar, Subbugan Ganesh, M. K. Mishra. (2013). Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2. International Journal of Genetics and Genomics, 1(1), 1-5. https://doi.org/10.11648/j.ijgg.20130101.11

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ACS Style

Anil Kumar; Subbugan Ganesh; M. K. Mishra. Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2. Int. J. Genet. Genomics 2013, 1(1), 1-5. doi: 10.11648/j.ijgg.20130101.11

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AMA Style

Anil Kumar, Subbugan Ganesh, M. K. Mishra. Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2. Int J Genet Genomics. 2013;1(1):1-5. doi: 10.11648/j.ijgg.20130101.11

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@article{10.11648/j.ijgg.20130101.11,
  author = {Anil Kumar and Subbugan Ganesh and M. K. Mishra},
  title = {Monohybrid Mendelian Segregation in an Interspecific Hybrid Population of Tetraploid X Diploid Coffea Species- Part 2},
  journal = {International Journal of Genetics and Genomics},
  volume = {1},
  number = {1},
  pages = {1-5},
  doi = {10.11648/j.ijgg.20130101.11},
  url = {https://doi.org/10.11648/j.ijgg.20130101.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijgg.20130101.11},
  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.},
 year = {2013}
}

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