Evaluation of Biophysical and Biochemical Parameters of Okra Genotypes for Resistance against jassid, Amrasca biguttula biguttula (Ishida)

Author: Dose Janhavi G., N. S. Satpute, S. K. Bhalkare, S. S. Lande and Thakre B. A.

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Abstract

The study was conducted on twenty selected genotypes of okra to evaluate the role of biophysical and biochemical parameters imparting resistance or susceptibility to jassid [(Amrasca biguttula biguttula) (Ishida)] Leafhopper is a sucking insect pest which causes hopper burn symptom that can reduce productivity of the crop. The biophysical characters viz., trichome density on vein, leaf lamina and midrib of different okra genotypes are associated with infestation of leafhopper ranged as 7 to 15, 7.9 to 15.1 and 6.5 to 12.7, respectively. The highest phenol content (1.57 mg/gm) and lowest percentage of total soluble sugar content (2.36%) was recorded in the genotype, PDKV Pragati while, minimum phenol content (0.87 mg/gm) and highest total soluble sugar content was observed in the genotype, Korchi x Phule (5.21%). The biophysical characters of okra genotypes exhibited significant influence on infestation of leafhoppers. The plant characters viz., trichome density on vein (r = -0.97), leaf lamina (r = -0.93) and midrib (r = -0.98) were negatively correlated with resistance to leafhopper infestation. The biochemical constituent total soluble sugar (0.964) was positively correlated while phenol content (r = -0.83) showed negative correlation with leafhopper population. The okra genotypes, PDKV Pragati, Arka Anamika, Parbhani Kranti and Akola Bahar were found to be resistant, while Korchi x Phule and Vijayalaxmi were categorized as susceptible. Thus, the genotypes which are resistant can be used as a source for breeding of okra against Amrasca biguttula biguttula.

Keywords

Okra, Amrasca biguttula biguttula, Biophysical parameter, Biochemical parameters, correlation coefficient, correlation matrix

Conclusion

Biological factor (trichome density), high trichome density were strongly associated with resistance. Biochemical factors viz., high phenol and low total soluble sugar were the contributing characters for imparting resistance against leafhoppers.

References

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How to cite this article

Dose Janhavi G., N. S. Satpute, S. K. Bhalkare, S. S. Lande and Thakre B. A. (2023). Evaluation of Biophysical and Biochemical Parameters of Okra Genotypes for Resistance against jassid, Amrasca biguttula biguttula (Ishida). Biological Forum – An International Journal, 15(10): 1607-1614.