2. Institutional Publications

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Author: search.filters.author.Rajan, S

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    Relative efficiency of different selection methods in tomato improvement
    (Kerala Agricultural University, 1988) Rajan, S; Peter, K V
    Singb seed descent from elite selection (SSDES) was found to ba effective to improve .different economic characters under simultaneous selection, in tomato as compared to mass, pureline and bulk methods of selection.
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    Heterosis of growth characters and earliness in Snakegourd (Trichosanthes anguina L.)
    (Kerala Agricultural University, 1993) Philip Varghese; Rajan, S
    Heterosis of growth characters and earliness in snakegourd was worked out in a 13 x 13 analysis. Heterobeltiosis and standard heterosis were found for main vine length, primary branches per plant, days to first male flower anthesis, days to first female flower opening, fruiting nodes on main vine, days to fruit maturity and days to first f r u i t picking maturity. Days to first female flower opening showed high heterobeltiosis in parental combinationsTA 102xTA 41, TA 77xTA 41 and TA87xTA30. The crosses TA 77 xTA 55, TA 89 xTA 19,TA89xTA 102andTA77xTA 99 were highly heterobelliotic for days to first fruit pickig maturity and in crosses TA 100 x TA 82, TA 77 x TA 99, TA 77 x TA 41 and TA 30 x TA 99, standard helerosis was high for this trait.
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    Genetic variability and heritability studies in snakegourd (Trichosanthes Anguina L.)
    (Kerala Agricultural University, 1993) Philip Varghese; Rajan, S
    Genetic variability and heri lability parameters were studied in48snakegourd accessions. The genotypic coefficient of variation was high for f r u i t i ng nodes on main vine, male flowers/plant, sex ratio, fruits/plant and crude fibre content. The heritabilily was high for total duration of the crop and crude protein content of the f r u i t . Male flowers/plant, sex ratio, fruiting nodes on main vine and fruits/plant exhibited high heritability and high genetic gain indicating additive gene action. Yield/plant, fruit length, total crop duration, days to first harvest and days to first male flower anthesis exhibited high heritability and low genetic gain which indicate nonadditive gene action including epistasis and dominance pointing towards heterosis breeding for high yields and earliness.
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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
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    Chromosome number of a semi-wild form of okra
    (Kerala Agricultural University, 1996) Reena Susan Chacko; Suresh Bahu, K V; Rajan, S
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    Floral biology of annual drumstick
    (Kerala Agricultural University, 1996) Suresh Bahu, K V; Rajan, S
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    Genetic variability in Abelmoschus caillei L.
    (Kerala Agricultural University, 1999) Reena Susan Chacko; Suresh Babu, K V; Rajan, S; Krishnan, S
    Studios on parameters of variability, correlation and path coefficient analysis of fruit yield in Abelmoschus caillei L- revealed that characters such as number of branches per plant, number of nodes per plant, plant height and fruit length had maximum coefficient of variation. Higher values of heritahility anil genetic advance were simultaneously estimated for fruit yield per plant and fruits per plant. Yield per plant had hiph positive significant correlation with fruits per plant, fruit length, fruit weight, plant height and number of intemodes on main stem. Path analysis revealed positive direct effect on fruit yield per plant through fruits per plant followed by plant height,
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    New leaf spot disease in green amaranth
    (Kerala Agricultural University, 2000) Krishnakumary, K; Sally K Mathew; Rajan, S
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    promising triploid of little gourd
    (Kerala Agricultural University, Vellanikara, 2001) Suresh Babu, K V; Rajan, S
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    Heterosis for yield components and fruit characters in tomato
    (Kerala Agricultural University, Vellanikara, 2001) Alice, Kurian; Peter, K V; Rajan, S
    Heterosis for yield components and fruit characters was studied using line x tester analysis between bacterial wilt resistant / tolerant accessions and processing varieties. Heterotic hybrids were identified for average fruit weight (Sakthi x Fresh Market 9, Sakthi x HW 208F), yield / plant (Sakthi x TH 318, Sakthi x Fresh Market 9), locule number (LE 206 x Ohio 8129, LE 214 x St 64) and pericarp thickness (Sakthi x St 64, LE 206 x 64, LE 214 x St 64). All the hybrids were late to harvest and they produced fruits with round shape.