Investigating the Correlation and Principal Component of Quantitative Traits in Mixed Cropping of Okra and Cucumber

Malihe Sadeghizadeh *

Department of Agricultural Engineering, Technical and Vocational University (TVU), Tehran, Iran.

*Author to whom correspondence should be addressed.


Aims: With the aim of Choosing the most appropriate treatment and investigating the relationships between the traits and investigating the correlation and principal component analysis (PCA) of the morphological and physiological traits, an experiment was conducted in the form of a randomized complete block design (RCBD) in 3 replications on mixed cropping of okra and 3 varieties of cucumber in greenhouse.

Study Design:  In order to conduct the experiment, a randomized complete block design was used (RCBD) in three replications.

Place and Duration of Study: This study was conducted in Damavand region of Iran in 2019-2020.

Methodology: This experiment was conducted in a metal frame greenhouse where the average temperature of the greenhouse was 25°C and the relative humidity was 40%. During the harvest season, 3 cucumber plants and one okra plant were randomly sampled and recorded, and the numerical value of each trait was recorded based on the average of 3 random plants.

Results: The results obtained from the correlation coefficients indicated that the trait of dry fruit yield has a positive and significant correlation with the traits of fruit weight and fresh fruit yield. Also, in examining the correlation graph between the traits, dry fruit yield and wet fruit yield traits had positive correlations with chlorophyll a, number of fruits, total chlorophyll and plant height traits. Based on the main components, 4 components accounted for more than 55% of the total variance of the data, respectively, 16% related to the first component, 14% related to the second component, 11% related to the third component, and 10% related to the fourth component. Graphical analysis was used on the data obtained from the experiment. Based on the ranking diagram of treatments in terms of traits, A1B2 (Baker x Mito) and A1B1 (Baker x NEGIN ) treatments were selected as suitable treatments.

Conclusion: Comparison of the treatments with the okra single cropping treatment showed that doing mixed cropping of okra: cucumber can have a great effect on increasing the level of desirability in various traits in the target crop.

Keywords: Cucumber, okra, correlation, PCA, mixed culture, graphic analysis

How to Cite

Sadeghizadeh , M. (2023). Investigating the Correlation and Principal Component of Quantitative Traits in Mixed Cropping of Okra and Cucumber . Asian Journal of Research in Agriculture and Forestry, 9(4), 10–18.


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Tarassoum TD. Performance of okra (Abelmoschus esculentus Moench) under different irrigation frequencies. North American Academic Research. 2019;2(8): 49-61.

Alizadeh Y, Koocheki A, NASSIRI MM. Yield, yield components and potential weed control of intercropping bean (Phaseolus vulgaris) with sweet basil (Ocimum basilicum) Systems in an additive experiment. European Journal of Agronomy. 2009;24:325-332.

Shafagh-Kolvanagh J, Dalayi-Milan A, Zehtab-Salmasi S, Raei Y, Dastborhan S. Effects of Intercropping on Weeds Control and Dragon’s Head (Lallemantia iberica Fischer & CA Meyer) Yield. Journal Of Agroecology. 2019;11(4):1497-1510.‏

Rezaei-Chianeh E, Nassab ADM, Shakiba MR, Ghassemi-Golezani K, Aharizad S, Shekari F. Intercropping of maize (Zea mays L.) and faba bean (Vicia faba L.) at different plant population densities. African Journal of Agricultural Research. 2011; 6(7):1786-1793.‏

Awal MA, Koshi H, Ikeda T. Radiation interception and use by maize/peanut intercrop canopy. Agricultural and Forest Meteorology. 2006;139(1-2):74-83.

Banik P, Midya A, Sarkar BK, Ghose SS. Wheat and chickpea intercropping systems in an additive series experiment: advantages and weed smothering. European Journal of Agronomy. 2006; 24(4):325-332.

Hamzei J, Babaei M. Study of quality and quantity of yield and land equivalent ratio of sunflower in intercropping series with bean. Agroecology. 2017;8(4):490-504.

Anim O, Limbani NV. Effect of intercropping on the growth and yield of cucumber (Cucumis sativus L.) and Okra (Abelmoschus esculentus L.) Moench. International Journal of Agriculture and Biology (Pakistan); 2007.

Pelzer E, Bazot M, Makowski D, Corre-Hellou G, Naudin C, Al Rifaï M, Jeuffroy MH. Pea–wheat intercrops in low-input conditions combine high economic performances and low environmental impacts. European Journal of Agronomy. 2012;40:39-53.

Sujatha S, Bhat R, Kannan C, Balasimha D. Impact of intercropping of medicinal and aromatic plants with organic farming approach on resource use efficiency in arecanut (Areca catechu L.) plantation in India. Industrial Crops and Products. 2011; 33(1);78-83.

Naderi, Ruholah, Kashi, Abdul Karim, Sam Deliri, Morteza. Investigating the growth and performance of cucumber (Cucumis sativus L) and okra (Abelmoschus esculentus L) in mixed culture method. Crop Ecology (Modern Agricultural Science). 2006;6(19):89-100.


Yan W, Kang MS. GGE biplot analysis: A graphical tool for breeders, geneticists, and agronomist. CRC press. Boca Raton, FL; 2003.

Yan W, Cornelius PL, Crossa J, Hunt LA. Two types of GGE biplots for analyzing multi‐environment trial data. Crop Science. 2001;41(3):656-663.

Yan RC, Crossa J, Cornelius PL, Burgueño J. Biplot analysis of genotype× environment interaction: Proceed with caution. Crop Science. 2009;49(5):1564-1576.

Semeskandi MN, Mazloom P, Arabzadeh, B, Moghadam, MN, Ahmadi T. Application of correlation coefficients and principal components analysis in stability of quantitative and qualitative traits on rice improvement cultivation. Brazilian Journal of Biology. 2023;84:268981.

‏Semeskandi MN, Mazloom P, Arabzadeh B, Moghadam, MN, Ahmadi T. Evaluation of seedling cultivation and irrigation regimes on yield and yield components in rice plant. Brazilian Journal of Biology. 2022;84.‏

Mousavi SMN, Illés A, Bojtor C, Demeter C, Zsuzsanna B, Vad A, Nagy J. Quantitative and qualitative yield in sweet maize hybrids. Brazilian Journal of Biology. 2022;84.‏

Illés Á, Szabó A, Mousavi SM. N, Bojtor C, Vad A, Harsányi E, Sinka, L. The Influence of precision dripping irrigation system on the phenology and yield indices of sweet maize hybrids. Water. 2022; 14(16):2480.‏