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|Authors:||PATHARE, SUDHAKAR BHANUDAS|
|Advisor:||LAWANDE, Dr.K. E|
|Title:||GENETICAL STUDIES FOR YIELD, POWDERY MILDEW RESISTANCE AND FRUIT ROT RESISTANCE IN CHILLI (Capsicum annuum L..)|
|Publisher:||MAHATMA PHULE KRISHl VIDYAPEETH RAHURI, DIST AHMEDNAGAR 413722 MAHARASHTRA STATE (INDIA)|
|Abstract:||An investigation was undertaken with a view to studying the extent of heterosis, general and specific combining ability effects, heritability, gene action for various economic characters and powdery mildew and fruit rot resistance in chilli. Seven lines and five testers were crossed using line x tester mating system. The resulting 35 Fi hybrids alongwith parents were evaluated during 1993-95. The six best combinations selected on the basis of perse performance were further subjected to generation (P^ P2, Fi, F2l BCi, and BC2) mean analysis to study the nature and magnitude of gene action. These crosses were used for screening against powdery mildew and fruit rot resistance. Significant and positive heterosis was observed for yield and its contributing characters. The percentage of heterosis over top parent were maximum for yield/plant (red ripe) (125.32%) followed by yield/plant (red dry) ( 108.33%), no. of primary branches/plant (45.95%) and no. of secondary branches/plant (6.88%). The crosses L2 x T3, L2 x T^ L3 x Ti, L2 x T2> and L3 x T2 were most promising for yield and yield attributes and may be assessed for exploitation by heterosis breeding. The studies on combining ability revealed that the parents Li, L2, L3l Ti, T2, and T3 exhibited good general combining ability effect for most of the characters. The maximum sea effects were recorded for yield and economical characters. The combinations, L2 x Ti, L3 x Ti, L2 x T3, L3 x T2 exhibited the highest sea effects for yield and yield contributing characters. The situation therefore indicated the possibility of commercial exploitation of hybrid vigour by using suitable combinations. Variance due to general combining ability were more than sea for all characters studied except plant height and no. of primary and secondary branches/plant. Analysis of gene effects revealed that dominance genetic effect played an important role in expression of most of the characters for most of crosses. High heritability was observed for all characters except plant height which exhibited moderate heritability percentage. Both additive and dominance and major gene effects of epistatic interaction was present in all crosses. Most of the crosses showed duplicate type of epistasis. Dominance gene action was predominant for inheritance of powdery mildew and fruit rot resistance.|
|Appears in Collections:||Thesis|
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