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999			_c27266 _d27266
003			OSt
005			20220927105817.0
008			140128s9999 xx 000 0 und d
082			_a630.28 _bMUT/GE
100			_aMuthuswami A
245			_aGenetic analysis of yield and leaf curl virus resistance in chilli
260			_aVellayani _bDepartment of Plant Breeding and Genetics, College of Agriculture _c2004
502			_bPhD
520	3		_aChillies are the green and dried ripe fruits of Capsicum annuum L or Capsicum [rutscens . It forms an indispensable adjunct in everv house in tropical world. It is specially liked for its pungency and spicy taste. besides the appealing colour it adds to the food One of the important biotic stresses in this crop is the leaf curl disease virus caused by the chilli leaf curl virus, which causes considerable loss in yield. It is transmitted by the vector Bemisia tabaci and can be controlled by chemicals but harmful to health and environment. Due to this cultivation of chillies has become uneconomical particularly during summer season. There is an immediate need to develop leaf curl resistant varieties for summer cultivation. Hence the present investigation was undertaken on "Genetic analysis of yield and leaf curl virus resistance in Chilli (Capsicum annuum L." at the Department of Plant Breeding and Genetics, College of Agriculture, Vellayani during 2001-2003 with the objective of estimating the combining ability, heterosis and gene action involved in the inheritance of yield and leaf curl virus resistance. Five susceptible high yielding lines Jwalarnukhi, Kottikulam I . . Local, Mangalapuram Local, Koothali Local and Pollakkada Local were crossed with three resistant testers Haripuram Local, Alampady Local and Neyyattinkara Local in L x T pattern and IS F IS thus produced were evaluated along with the parents in randomized block design. Analysis of variance revealed highly significant genotypic difference for all the characters studied. The observations recorded were days to first flowering, days to 50 per cent flowering, number of primary branches, number of secondary branches, number of fruits per plant, average green fruit weight, fruit yield per plant. fruit length. fruit girth, number of seeds per fruit, hundred seed weight, plant height. duration of -the crop, harvest index. capsaicin content, oleoresin content and vulnerability index calculated on the basis of virus disease scoring. Variability studies indicated high GCV and PCV for the characters fruit yield, capsaicin content and vulnerability index. High heritability coupled with high genetic advance were exhibited for all the characters excluding days to first flowering, days to 50 per cent flowering and duration of the crop. Fruit yield per plant showed significant positi ve genotypic correlation with primary and se_condary branches, number of fruits per plant, green fruit weight, fruit length, fruit girth, number of seeds per fruit, plant height, harvest index, duration of the crop and capsaicin content. It had significant negative correlation with vulnerability index. Combining ability analysis showed that the line Pollakkada Local and the tester Neyyattinkara Local were good general combiners for fruit yield along with leaf curl resistance. Significant desirable sea effect for fruit yield and vulnerability index was exhibited by three hybrids viz., Jwalarnukhi x Haripuram Local, lwalamukhi x Neyyattinkara Local and Pollakkada Local x Alampady Local. The hybrids Jwalamukhi x Neyyattinkara Local, Pollakkada Local x Alampady Local and PoHakkada Local x Neyyattinkara Local exhibited significant desirable standard heterosis for yield and vulnerability index. Considering per se 'Performance, standard heterosis and sea effect two hybrids Pollakkada Local x Alampady Local and Pollakkada Local x Neyyattinkara Local were chosen as the good hybrids. Generation mean analysis was carried out using six-parameter model. Six generations viz. PI, P2, F I, F2, BI, B2 were built up among the crosses Pollakkada Local x Alarnpady Local and Pollakkada Local x Neyy attinkara Local. Presence of additive, dominance and epistatic interaction for all the characters indicated that recurrent selection or recombination-breeding programme can be fo llowed for future breeding
700			_aAbdul Khader K M (Guide)
856			_uhttp://krishikosh.egranth.ac.in/handle/1/5810015101
942			_2ddc _cTH