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Genetic Variability and Association of Characters of Hermaphrodite Papaya Genotypes

Received: 2 June 2016     Accepted: 12 June 2016     Published: 21 July 2016
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Abstract

An experiment was conducted to evaluate genetic variability and association of characters of hermaphrodite papaya genotypes for further breeding improvement. Sixteen hermaphrodite papaya genotypes were evaluated at Melkassa Agricultural Research Centre in a randomized complete block design experiment with two replicates from 2011 to 2013. Based on the analysis, the genotypes showed variation in their performances. High heritability coupled with high genetic advance recorded for fruit weight (94, 44.75) followed by inter-node length (86, 37.3), fruit length (94, 29.25), and total number of fruit per plant (75, 30.94). Yield per plant exhibited highly significant positive correlation with inter-node length (0.7, 0.58), fruit length (0.49, 0.46) and fruit diameter (0.41, 0.44) both genotypic and phenotypic levels respectively. Based on path coefficient analysis, number of fruits per plant had the highest direct effect (1.05) on fruit yield per plant followed by fruit length (0.56), fruit diameter (0.49) and fruit weight (0.45). The overall results of this study indicated number of fruits, fruit length, fruit diameter, fruit weight and inter-node length exhibited high variation, heritability and genetic advance, and positive direct path coefficient effect on fruit yield per plant. Hence, these traits can be used as principal selection criteria for papaya fruit yield improvement.

Published in Advances in Bioscience and Bioengineering (Volume 4, Issue 2)
DOI 10.11648/j.abb.20160402.11
Page(s) 10-15
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), 2016. Published by Science Publishing Group

Keywords

Heritability, Genetic Advance, Association, Path Analysis, Genotypes

References
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  • APA Style

    Wegayehu Assefa, Edossa Etissa, Asmare Dagnew, Lemma Ayele, Girma Kebede, et al. (2016). Genetic Variability and Association of Characters of Hermaphrodite Papaya Genotypes. Advances in Bioscience and Bioengineering, 4(2), 10-15. https://doi.org/10.11648/j.abb.20160402.11

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    ACS Style

    Wegayehu Assefa; Edossa Etissa; Asmare Dagnew; Lemma Ayele; Girma Kebede, et al. Genetic Variability and Association of Characters of Hermaphrodite Papaya Genotypes. Adv. BioSci. Bioeng. 2016, 4(2), 10-15. doi: 10.11648/j.abb.20160402.11

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    AMA Style

    Wegayehu Assefa, Edossa Etissa, Asmare Dagnew, Lemma Ayele, Girma Kebede, et al. Genetic Variability and Association of Characters of Hermaphrodite Papaya Genotypes. Adv BioSci Bioeng. 2016;4(2):10-15. doi: 10.11648/j.abb.20160402.11

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  • @article{10.11648/j.abb.20160402.11,
      author = {Wegayehu Assefa and Edossa Etissa and Asmare Dagnew and Lemma Ayele and Girma Kebede and Mikiyas Damtew and Merkebu Ayalew},
      title = {Genetic Variability and Association of Characters of Hermaphrodite Papaya Genotypes},
      journal = {Advances in Bioscience and Bioengineering},
      volume = {4},
      number = {2},
      pages = {10-15},
      doi = {10.11648/j.abb.20160402.11},
      url = {https://doi.org/10.11648/j.abb.20160402.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.abb.20160402.11},
      abstract = {An experiment was conducted to evaluate genetic variability and association of characters of hermaphrodite papaya genotypes for further breeding improvement. Sixteen hermaphrodite papaya genotypes were evaluated at Melkassa Agricultural Research Centre in a randomized complete block design experiment with two replicates from 2011 to 2013. Based on the analysis, the genotypes showed variation in their performances. High heritability coupled with high genetic advance recorded for fruit weight (94, 44.75) followed by inter-node length (86, 37.3), fruit length (94, 29.25), and total number of fruit per plant (75, 30.94). Yield per plant exhibited highly significant positive correlation with inter-node length (0.7, 0.58), fruit length (0.49, 0.46) and fruit diameter (0.41, 0.44) both genotypic and phenotypic levels respectively. Based on path coefficient analysis, number of fruits per plant had the highest direct effect (1.05) on fruit yield per plant followed by fruit length (0.56), fruit diameter (0.49) and fruit weight (0.45). The overall results of this study indicated number of fruits, fruit length, fruit diameter, fruit weight and inter-node length exhibited high variation, heritability and genetic advance, and positive direct path coefficient effect on fruit yield per plant. Hence, these traits can be used as principal selection criteria for papaya fruit yield improvement.},
     year = {2016}
    }
    

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  • TY  - JOUR
    T1  - Genetic Variability and Association of Characters of Hermaphrodite Papaya Genotypes
    AU  - Wegayehu Assefa
    AU  - Edossa Etissa
    AU  - Asmare Dagnew
    AU  - Lemma Ayele
    AU  - Girma Kebede
    AU  - Mikiyas Damtew
    AU  - Merkebu Ayalew
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    N1  - https://doi.org/10.11648/j.abb.20160402.11
    DO  - 10.11648/j.abb.20160402.11
    T2  - Advances in Bioscience and Bioengineering
    JF  - Advances in Bioscience and Bioengineering
    JO  - Advances in Bioscience and Bioengineering
    SP  - 10
    EP  - 15
    PB  - Science Publishing Group
    SN  - 2330-4162
    UR  - https://doi.org/10.11648/j.abb.20160402.11
    AB  - An experiment was conducted to evaluate genetic variability and association of characters of hermaphrodite papaya genotypes for further breeding improvement. Sixteen hermaphrodite papaya genotypes were evaluated at Melkassa Agricultural Research Centre in a randomized complete block design experiment with two replicates from 2011 to 2013. Based on the analysis, the genotypes showed variation in their performances. High heritability coupled with high genetic advance recorded for fruit weight (94, 44.75) followed by inter-node length (86, 37.3), fruit length (94, 29.25), and total number of fruit per plant (75, 30.94). Yield per plant exhibited highly significant positive correlation with inter-node length (0.7, 0.58), fruit length (0.49, 0.46) and fruit diameter (0.41, 0.44) both genotypic and phenotypic levels respectively. Based on path coefficient analysis, number of fruits per plant had the highest direct effect (1.05) on fruit yield per plant followed by fruit length (0.56), fruit diameter (0.49) and fruit weight (0.45). The overall results of this study indicated number of fruits, fruit length, fruit diameter, fruit weight and inter-node length exhibited high variation, heritability and genetic advance, and positive direct path coefficient effect on fruit yield per plant. Hence, these traits can be used as principal selection criteria for papaya fruit yield improvement.
    VL  - 4
    IS  - 2
    ER  - 

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Author Information
  • Department of Horticulture, Ethiopian Institute of Agricultural Research, Adama, Ethiopia

  • Department of Horticulture, Ethiopian Institute of Agricultural Research, Adama, Ethiopia

  • Department of Horticulture, Ethiopian Institute of Agricultural Research, Adama, Ethiopia

  • Department of Horticulture, Ethiopian Institute of Agricultural Research, Adama, Ethiopia

  • Department of Horticulture, Ethiopian Institute of Agricultural Research, Adama, Ethiopia

  • Department of Horticulture, Ethiopian Institute of Agricultural Research, Adama, Ethiopia

  • Department of Horticulture, Ethiopian Institute of Agricultural Research, Adama, Ethiopia

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