Evaluation of blackgram genotypes for morphological and biochemical host plant resistance traits against whiteflies and yellow mosaic virus
DOI:
https://doi.org/10.53550/jfl.v39i1.2486Keywords:
Biochemical, Phenotypical, Urdbean, Whitefly, Yellow Mosaic Virus (YMV)Abstract
In the present investigation, 26 blackgram genotypes for morphological traits were evaluated for host plant resistance traits against whiteflies and yellow mosaic virus under field conditions, and analysed for biochemical parameters. The results showed that the mean population of whiteflies varied significantly and ranged from 2.8 to 8.8 whiteflies per leaf. Among twenty-six genotypes, LBG-752, MBG-1123, MBG-1179, MBG-1070, MBG-1152, MBG-1160 and MBG- 1166 were identified moderately resistant (MR) (WRI=2.0). Morphologically, resistant and moderately resistant genotypes recorded higher in leaf thickness (0.137 to 0.164 mm), trichome density (11.39 to 17.67 mm2) and length (1.58 to 1.83 mm), and biochemically with elevated tannin and phenol contents. Whitefly population showed a strong negative association with both morphological (leaf thickness, trichomes) and biochemical (tannins, phenols) traits, indicating their key role in conferring resistance to whiteflies and YMV in blackgram.
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