Browsing by Author "Prasanna, K P"

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Evaluation of F1 hybrids of okra (Abelmoschus Esculentus [L.] Moench)
(Kerala Agricultural University, 1994) Suresh Babu, K V; Prasanna, K P; Rajan, S
Genetic variability in Hyacinth bean (Lablab purpureus (L.) sweet)
(Department of Olericulture, College of Horticulture, Vellanikkara, 2000) Biju, M G; Prasanna, K P
Impact of organic sources of plant nutrients on yield and quality of brinjal
(Department Of Olericulture, College Of Horticulture, Vellanikkara, 1998) Prasanna, K P; Rajan, S
An investigation on the "Impact of organic sources of plant nutrients on yield and quality of brinjal" was carried out at the College of Horticulture, Kerala Agricultural University, Vellanikkara during 1993-1997. Results showed that yield attributes of brinjal like number of fruits, volume of fruits, yield per plant and yield per plot was maximum with highest level of poultry manure (155 Kg N ha-1) The crop duration as well as the number of harvests were significantly increased when poultry manure was applied at the highest level (155 kg N ha-1). Quality parameters like ascorbic acid and total soluble solids were maximum with the highest level of poultry manure. , The starch content as well as reducing sugar content of fruits were maximum with higher level of FYM and poultry manure while all the organic treatments were at par with regard to total sugars. Moisture content of fruits increased with increasing levels of N. The appearance, flavour, texture and taste of cooked fruits were superior from treatment involving lower level of poultry manure while the colour preference was for the fruits from treatments having inorganic fertilizers alone at lower level. Maximum per cent of unmarketable fruits after five days and seven days of storage was obtained from the plants supplied with inorganic fertilizers alone and minimum in plants given with organic manures alone. Seed characters like number of seeds per fruit, weight of seeds per fruit, seed yield per plant and germination per cent of seeds were maximum in treatments having higher level of poultry manure (155 kg N ha-1). Shoot and fruit borer attack was reduced with the application of FYM alone, while incidence of epilachna beetle was reduced with the application of FYM or poultry manure alone. Physical as well as chemical properties of soil in terms of bulk density, organic carbon, total N, available P and K were improved with the continuous application of organic manures alone. Total uptake of N, P and K were maximum for the plants applied with higher level of poultry manure. Poultry manure at higher level showed average stability with regard to almost all yield contributing characters. Brinjal cultivation was found to be more remunerative with the application of poultry manure at higher level (155 kg N ha-1) .
Incorporation of jassid, amrasca biguttula biguttula (Ishida) resistance in a bacterial wilt resistant background in brinjal.
(Department of Olericulture, College of Horticulture, Vellanikkara, 2011) Seeshma, K S; Prasanna, K P
Brinjal or egg plant (Solanum melongena L.) is one of the most important vegetable crops of India for which the country occupies second position in production. In the country crop is grown in an area of 6.12 lakh hectares producing 105.63 lakh tonnes with an average productivity of 17.26 tonnes per hectare (NHB database, 2010). During summer, the cultivation of brinjal is limited in Kerala due to the severe incidence of sucking insects, especially jassids (Amrasca biguttula biguttula) which are causing severe yield reduction in brinjal. Malini (2005) screened 36 accessions of brinjal to identify the sources of resistance to jassid attack and she reported seven brinjal genotypes with jassid resistance. The proposed study was conducted to transfer this jassid resistance from four identified sources (SM 363, SM 364, SM 366, and SM 385) into the bacterial wilt resistant commercial varieties like Surya, Swetha and Haritha through hybridization. These seven parents were raised in the pots and the bacterial wilt resistant varieties were crossed directly with jassid resistant accessions to develop 12 F1hybrids. The resulting 12 F1 hybrids along with seven parents were raised in the field as well as in sterilized pots. The crop was raised in the field in randomized block design with two replications. The plot size was 5.4 m2 with 12 plants in each replication planted at a distance of 0.75 x 0.60 m. The performance of the accessions was studied and they were screened for jassid and bacterial wilt resistance. The experiments were conducted during kharif (2010) and summer (2011). The biometrical characters were recorded and genetic parameters of 19 brinjal accessions were estimated. The results showed that all accessions had significant difference for most of the characters studied among which Surya x SM 366 and Surya x SM 385 were found to have good yield characters. In the case of earliness, Surya x SM 366 and Haritha x SM 366 were found to be better hybrids. The heterotic study revealed that among the F1 hybrids, Surya x SM 366 and Haritha x SM 366 were having high and significant standard heterosis for earliness to flowering and fruiting from the standard variety Haritha. For yield characteristics, Surya x SM 366 was found to be best hybrid with maximum and significant heterosis from better parent, standard variety and mid parent. The estimates of combining ability analysis revealed that the male parent SM 366 was the best general combiner for most of the characters like plant height, days to first flowering, days to first harvest, number of economic harvests, yield per plant and yield per plot. In the case of specific combining ability, Swetha x SM 364 was found to be good specific combiner for yield characteristics. After the field screening and cage study for jassid resistance, two brinjal accessions viz. SM 363 and SM 366 were identified as highly resistant. Among the 12 F1 hybrids, Surya x SM 364, Surya x SM 385, Haritha x SM 364 and Haritha x SM 366 were moderately resistant. All other hybrids and the parents like Swetha and Haritha were grouped into susceptible category after the screening for jassid resistance. Screening for bacterial wilt resistance was also carried out to find out the hybrids with combined resistance to jassid and bacterial wilt. The accessions were categorized into either highly resistant or moderately resistant category after the field screening for bacterial wilt resistance. The F1 hybrids like Surya x SM 385 and Haritha x SM 366 were identified as better hybrids with combined resistance to jassids and bacterial wilt and with good yield characteristics. The study of leaf morphology of parents and F1 hybrids to unravel the mechanism of jassid resistance revealed that density of midrib hairs had a significant role in conferring resistance to jassids in brinjal whereas the leaf thickness and midrib thickness did not show any significant difference among resistant and susceptible accessions.
Performance evaluation and variability studies in spine gourd (Momordica dioica Roxb)
(Department of Olericulture, College of Horticulture, Vellanikkara, 2012) Archana, K A; Prasanna, K P
The experiment entitled “Performance evaluation and variability studies in spine gourd (Momordica dioica Roxb.)” was carried out in the Department of Olericulture, College of Horticulture, Vellanikkara, during October 2011 – February 2012. The major objective of the study was to identify superior spine gourd genotypes with high yield. The other objectives were to genetically catalogue the germplasm and to assess genetic variability, heritability, genetic gain and correlation of different traits with yield. Thirty one accessions of spine gourd collected from different parts of Kerala were grown in randomized block design with two replications. Cataloguing of germplasm exhibited significant differences for all characters studied viz., early plant vigour, plant growth habit, leaf margin and flower colour in both male and female accessions, and also fruit shape, nature of spines, blossom end fruit shape, fruit skin colour, fruit bitterness and seediness in female accessions. The quantitative characters studied were vine length, number of branches per plant, days to first flower opening and duration of the crop in both male and female accessions, and also days to first harvest, days to last harvest, days from flowering to vegetable maturity, total number of harvests, fruit length, fruit girth, average fruit weight, number of fruits per plant, yield per plant, duration of the crop and shelf life in open condition in female accessions. Among these all the characters showed significant difference between the accessions except vine length. From the experiment it could be concluded that the highest yielding accession was MD 227 with an average yield of 110.06 g per plant. The same accession recorded the highest value for total number of fruits per plant (18.25) and total number of harvests (6.0). High genotypic and phenotypic coefficient of variation was observed for days from flowering to vegetable maturity, total number of harvests and fruit length. Yield exhibited genotypic correlation with number of branches per plant, total number of harvests, fruit length and number of fruits per plant. In path coefficient analysis the highest positive direct effect on yield was exhibited by total number of harvests followed by fruit girth. Based on the selection indices, the accession MD 226 was found to be the most superior one followed by the accession MD 227, MD221 and MD 207. In the organoleptic evaluation the accession MD 161 with the total score of 20 out of 25 was the most accepted one.
Performance of clonal progenies from different yield groups and in relation to size of suckers in rainfed banana musa (AAB Group) palayankodan
(Department of Pomology & Floriculture and Landscaping, College of Horticulture, Vellanikkara, 1983) Prasanna, K P; Aravindakshan, N
Tae p resen t in v e s tig a tio n m e se r r ied c a t in the S ep erteen t e f Penology, C o lleg e e f iia r tie u ltu r e , V sllen lk ifsre from 1981 te 19<»2. The study wee aimed a t fin d in g ou t the e f f e e t e f suekare fr e e d iffe r e n t y ie ld group* end th e ir e is e en growth, d u r a tio n y ie ld end q u a lity e f f r u i t s . th e fe a r parental y ie ld groups fr e e which suckers were eeed were 5 te 7 hg9 d to 10 kg, 11 te 13 kg and 14 t e 16 k g . The e ls e e f seek ers need in the study wee 1 te 1*3 kg, 2 te 2 .5 kg end 3 te 3*5 k g . th e t r ia l wee la id s e t a s m f e e tor in i experiment in randomised bloc* d esign with twelve tr e e teen te end f iv e r e p lic a tio n s . • Seekers fr e e d iffe r e n t y ie ld groups had no e f f e e t en the morphological charactera , hut th e e ls e e f se ek ers in flu enced the a o rp h elo g lea l eh ereeta rs during the v e g e ta tiv e phase. Toward* sh e e tin g t in e , th ese differences were le v e lle d o f f . The duration e f the erep wee s ig n if ic a n t ly redueed whan the sueksr used wee larger* Meiinua duration wee t aken fey plant* rein ed fr e e euokere weighing 1 te 1 .5 k g. Y ield a ttr ib u te s v is * 9 w eight e f bunch, len g th e f buneh9 nusber e f hands per buneh9 w eight e f hend9 number e f fin g e r s per bunch, and len g th , g ir th end w eight e f fin g e r were s e t in flu en ced by the treatment*. traatsante a loo n*& m t f fM l oa toe f r u i t quality UuffMUn like to ta l aoluOla M i l l * , a c id ity , to ta l sugar, radualng sugar, noxwaduoifig auger and augur/acid ra tio *
Performance of clonal progenies from different yield groups in banana cv. palayankodan
(Kerala Agricultural University, 1990) Prasanna, K P; Aravindakshan, M
Quality evaluation of winged bean seeds of selected genotypes
(Kerala Agricultural University, 1999) Anju M Neeliyara; Indira, V; Prasanna, K P
Screening brinjal for jassid, Amrasca biguttula biguttula (Ishida) tolerance
(Department Of Olericulture, College Of Horticulture, Vellanikkara, 2005) Malini, C D; Prasanna, K P
The present investigation entitled" Screening brinjal tor jassid Amrasca biguttula , biguttula (Ishida) tolerance" w 1S conducted in the Department of Olericulture, College of Horticulture, KeraJa Agricult .iral University, Vellanikkara during rabi (2004) and summer (2005). Thirty SIX brinjal accessions collected from different parts of the country were characterized for different qualitative and quantitative characters. The evaluated accessions exhibited considerable variation for growth habit, prickliness of plant parts, colour, shape and size of fruits and colour of petiole, leaves, stem and flowers. Fruit yield was maximum in FJ hybrid, Neelima and S1'.1 384. Swethe and Swetha X Haritha were early and produced maximum number of fruits per plant. Longest fruits were produced by SM 344. Fruits of SM 385 recorded maximum girth and SM 354 had hcav iest fruits. The study revealed high heritability coupled with high genetic advance for characters like fruit length, number of fruits per plant, days to last harvest and number of economic harvests. Yield was positively associated with number of fruits per plant :;JiT!ber of economic harvests and total harvests. The accessions SM 363, SM 364, SM 366, SM 384 and SM 385 were found ._T he morphological and anatomical bases of resistance was also studied. l ligh r • Lb hair density and longer midrib hairs were found to impart resistance in resistant/ tolerant accessio: tS. The anatomical studies of midrib of resistant and usceprible accessions revealed variation in cuticle thickness, cell wall thickness of epidermal cells and inter cellular space of hypodermal cells. These characters either alum' or in combination may be contrib ting resistance to oviposition and feeding of jassids ill brinjal.
Source efficiency relations of different organic manures on quality, productivity and shelf life of okra [Abelmoschus Esculentus (L.) Moench]
(Department Of Olericulture, College Of Horticulture, Vellanikkara, 1998) Smitha Nandini, P K; Prasanna, K P