Journal ID : AMA-06-01-2023-11945
[This article belongs to Volume - 54, Issue - 01]
Total View : 413

Title : Biochemical and morphological basis of jassid (Amrasca devastans Dist.) resistance and inheritance in cotton (Gossypium hirsutum L.)

Abstract :

Four jassid resistant varieties (lines) were crossed with three high yielding adapted varieties (testers) in a Line x Tester fashion to elucidate morphological (trichome density and gossypol gland density) and biochemical (tannin, total phenols and gossypol content) basis of jassid resistance in cotton. The female parent KC 2 recorded high amount of trichome density, gossypol gland density, tannin, total phenols and gossypol content indicating that the parent KC 2 was highly resistant to jassid. Among the hybrids screened, the hybrids KC 2 x MCU 5, KC 2 x MCU 12, KC2 x MCU 7, SVPR 3 x MCU 5 and Khandwa 2 x MCU 12 were found to be moderately resistant under artificial epiphytotic condition. The correlation between jassid susceptibility grade and trichome density, gossypol gland density and tannin content was negative and significant while far between total phenols and gossypol content with jassid susceptibility grade. The inheritance study indicated that resistance in the parents was due to monogenic dominance or digenic interaction. The morphological and biochemical basis of resistance revealed that the high density of trichomes, total phenols, and gossypol gland density constituted the mechanism of resistance in cotton.

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