Genetic Variability and Characters Association of Hot Pepper (Capsicum annuum L.) Genotypes Tested under Irrigation in Northern Ethiopia
Abstract
Hot pepper production in most areas of Ethiopia especially in Tigray region is constrained by shortage of varieties, the prevalence of fungal and bacterial as well as viral diseases. Sixty-four hot pepper genotypes were evaluated to obtain the extent of genetic variability, association among characters. The experiment was laid out using 8x8 simple lattice design at Axum Agricultural Research center in 2017/18. Data were collected for 19 agronomic characters and analysis of variance revealed significant differences (p<0.01) among the genotypes for all characters. Fruit yield ranged from 0.8 to 4.5 t ha-1 with a mean of 2.7 t ha-1. The genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) ranged from 3.57and 3.84 for days to maturity to 42.4 and 42.9% for average single fruit weight. All the traits had moderate to very high broad sense heritability while genetic advance as percent of mean (GAM) ranged from 8.34 for days to maturity to 85% for average single fruit weigh. High heritability coupled with high GAM was obtained for average single fruit weight, fruit length, dry fruit yield per plant, fruit diameter and thousand seed weight reflecting the presence of additive gene action for the expression of these traits and improvement of these characters could be done through selection. Fruit yield per hectare had positive and highly significant phenotypic and genotypic correlations with dry fruit yield per plant, average single fruit weight, fruit pericarp thickness, thousand seed weight, fruit diameter and fruit length, but it had negative and highly significant genotypic and phenotypic correlations with days to maturity. Estimates of genotypic and phenotypic direct and indirect effects of various characters on fruit yield showed that dry fruit yield per plant, fruit pericarp thickness had the highest positive direct contribution to fruit yield indicating that selection based on these characters will improve fruit yield. In conclusion, the research results showed the presence of significant variations among genotypes for agro-morphology traits. Therefore, it is recommended further evaluation of genotypes or hybrids that exhibited highest yield, quality and disease resistance in subsequent breeding programs to improve the productivity of the crop.
References
Allard R.W. (1960). Principles of Plant Breeding. John Wiley, New York. 663p.
AxARc (Axum Agricultural Research Center). (2016). Problem appraisal report. Aksum, Ethiopia. (Unpublished).
Berhanu, Y., Derbew, B., Wosene, G., & Fedaku, M. (2011). Variability, Heritability and genetic advance in Hot Pepper (Capsicum annuum L.) Genotypes in West Shoa, Ethiopia. American-Eurasian Journal of Agriculture & Environmental Science, 10(4), 587-592.
Birhanu, H. Z. (2017). Genetic Variability and Association of Pod Yield and Related Traits in Hot Pepper (Capsicum annuum L.) Landraces of Ethiopia, MSc thesis Bahirdar Univeresity, Bahir Dar, 75pp.
Burton, G. W., & Devane, E. H. (1953). Estimating heritability in tall fescue (Festuca arundinacea) from replicated clonal material. Agronomy Journal, 45(10), 478-481. https://doi.org/10.2134/agronj1953.00021962004500100005x
Chakrabarty S., & Aminul Islam A. K. M. (2017). Selection Criteria for Improving Yield in Chili (Capsicum annuum L.). Research Article 1-9. https://doi.org/10.1155/2017/5437870
CSA, (Central Statistical Agency). (2017). Agricultural sample survey Report on area and production of major crops of private peasant holdings. The FDRE Statistical bulletin, 1(584). Addis Ababa, Ethiopia.118pp.
Dagnoko, A. S., Niamoye Y., Nadou P. S., Olagorite A., Aminata, D., Kadidiatou, G., Aissata, T., Seriba, K., & Daoule, D. (2013). Overview of pepper (Capsicum spp.) breeding in West Africa. African Journal of Agricultural Research, 8(13), 1108-1114. https://doi.org/10.5897/AJAR2012.1758
Datta, S., & Das L. (2013). Characterization and genetic variability analysis in Capsicum annuum L. germplasm. SAARC Journal of Agriculture, 11(1), 91-103. https://doi.org/10.3329/sja.v11i1.18387
Deshmukh, S. N., Basu, M. S., & Reddy, P. S. (1986). Genetic variability, character association and path coefficient analysis of quantitative traits in Viginia bunch varieties of ground nut. Indian Journal of Agricultural Science, 56, 515-518.
Dewey, D. R., & Lu, K. H. (1959). A correlation and path coefficient analysis of components of crested wheat grass seed production. Agronomy Journal, 51, 515-518. https://doi.org/10.2134/agronj1959.00021962005100090002x
FAO. (2015). Database of agricultural production (FAOSTAT). FAO Statistical Databases: Retrieved from http://faostat.fao.org/default.aspx
Fekadu, M., Singh, H., Lemma, D., Chemeda, F., & Sigvald, R. (2008). Genetic components and heritability of yield and yield related traits in hot pepper. Research Journal of Agricultural Biological Science, 4, 803-809.
Hasan, M. J., Kulsum, M. U., Ullah M. Z., Manzur, H. M., & Eleyash, M. M. (2014). Genetic Diversity of some Chili (Capsicum annuum L.) Genotypes. International Journal Agriculture Research Innovation & Technology, 4(1), 32-35. https://doi.org/10.3329/ijarit.v4i1.21088
IBPGR. (1983). Genetic resources of Capsicum a global plan of action. International Board for Plant Genetic Resources. IBPGR Secretariat, Rome.
IPGRI, AVRDC & CATIE. (1995). Descriptors for Capsicum (Capsicum spp.). International Plant Genetic Resources Institute, Rome, Italy; the Asian Vegetable Research and Development Center, Taipei, Taiwan, and the Centro Agronómico Tropical de Investigación y Enseñanza, Turrialba, Costa Rica. 110pp.
Janaki, M., Naram, N. L., Venkata, R. C., & Paratpara, M. R. (2015). Assessment of Genetic Variability, Heritability and Genetic Advance for Quantitative Traits in Chilli (Capsicum annuum L.). International Journal of Science, 10(2), 729-733.
Johnson, H. W., Robinson, H. F., & Comtock, R. E. (1955). Estimates of genetic and environmental variability in soy beans. Agronomy Journal, 47, 314-318. https://doi.org/10.2134/agronj1955.00021962004700070009x
Kadwey, S., Dadiga, A., & Prajapatis, S. (2015). Genotypes performance and genetic variability studies in hot chilli (capsicum annuum L.). Indian Journal of Agricultural Research, 50(1), 56-60. https://doi.org/10.18805/ijare.v0iOF.7105
Kumari, V. (2017). Genetic Variability and Character Association for Fruit Yield and Its Attributing Traits in Chilli (Capsicum annuum L.) MSc thesis, Indira Gandhi Krishi Vishwavidhyalaya, Raipur(Chhattisgarh).100pp.
MoANR (Ministry of Agriculture & Natural Resources). (2016). Plant variety release, protection and Seed Quality Control Directorate. Crop variety Register. Issue No.19. June 2016. Addis Ababa, Ethiopia.
Nsabiyera, V., Logose, M., Ochwo – Ssemakura, M., Sseruwagi, P., Gibson, P., & Ojiewo, P. (2013). Morphological Characterization of Local and Exotic Hot pepper (Capsicum annuum L.) Collections in Uganda. Bioremediation, Biodiversity and Bioavailability, 7(1), 22-32.
Pickersgill, B. (1997). Genetic Resources and Breeding of Capsicum spp. Euphytica, 96, 129-133. https://doi.org/10.1023/A:1002913228101
Pujar, U. U., Tirakannanavar, S., Jagadeesha, R.C., Gasti, V. D., & Sandhyarani, N. (2017). Genetic Variability, Heritability, Correlation and Path Analysis in Chilli (Capsicum annuum L.). International Journal Pure Applied Bioscience, 5(5), 579-586. https://doi.org/10.18782/2320-7051.5878
Rosmaina, S., Hasrol, F. Y., Juliyanti, & Zulfahmi. (2016). Estimation of variability, heritability and genetic advance among local chili pepper genotypes cultivated in peat lands. Bulgarian Journal of Agricultural Science, 22(3), 431-436.
Sahu, L., Trivedi, J., & Sharma, D. (2016). Genetic variability, heritability and divergence analysis in chilli (Capsicum annuum L.). Plant Archives, 16(1), 445-448.
Saleh, B. K. (2016). Production Status and Genetic Characterization of Eritrean Pepper (Capsicum Spp.) Ph.D Thesis. Jomo Kenyatta University of Agriculture and Technology Jkuat, Kenya, 185pp.
SAS Institute Inc. (2010). Statistical analysis Software version 9.2, Cary, NC: SAS Institute Inc. USA.
Sharma, V. K., Semwal, C. S., & Uniyal, S. P. (2010). Genetic variability and character association analysis in bell pepper (Capsicum annuum L.). Journal of Horticulture and Forestry, 2(3), 58-65.
Shimeles Aklilu Alemu. (2018). Diversity, Disease Reaction, Heterosis and combining Ability in Hot Pepper (Capsicum annuum L.) Genotypes for Agro-Morphological and Quality Traits in Ethiopia. Ph.D Thesis. Arsi University, Asella, Ethiopia.178pp.
Shimelis, A., Bekele, A., Dagne, W., & Adefris, T. (2016). Genetic variability and association of characters in Ethiopian hot pepper (Capsicum annuum L.) landraces. Journal of Agricultural Sciences, 61(1), 19-36. https://doi.org/10.2298/JAS1601019A
Silesh, D. (2011). Evaluation of Elite Hot Pepper Varieties (capsicum species) for Growth, dry pod yield and quality under Jimma condition, south west Ethiopia, MSc thesis, Jimma University, Jimma, 58pp.
Singh, B. D. (2001). Plant Breeding: Principles and Methods 6th ed. Kalyani Publishers, New Delhi, India.
Singh, R. K., & Chaundry, B. D. (1985). Biometrical Methods in Quantitative Genetic Analysis (2nd ed.). Kalayani Publishers, New Delhi-Ludhiana.
Vavilov N. I. (1951). Origin, variation, immunity and breeding of cultivated plants. Chronol Botany, 13, 4-364.
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