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Item Yield attributes and heritability in green gram (Phaseglus aureus Roxb.)(Kerala Agricultural University, 1979) Abraham, A X; Sreekumar, S GItem Effect of ethrel (2 chloro-ethyl phosphonic acid) on growth and yield of bhendi (Abelmoschus Esculentus L Moench)(Kerala Agricultural University, 1979) Sreekumar, S G; Ramachandran Nair, N; Jayachandran, B K; Mary K GeorgeItem Breaking seed dormancy in pottavaga (Albyzzia Stipulata, Boivin)(Kerala Agricultural University, 1978) Gopinathan Nair, N; Ramachandran Nair, N; Sreekumar, S GItem Heterosis in greengram(Kerala Agricultural University, 1978) Sreekumar, S G; Abrahm, A TFive elite strains (P. S. 7 X Madira, PLMB 9, Pusa Baisakhi, E.C 1653) and their 10 cross combinations were compared in an experiment adopting a randomised block design with 3 replications. The study revealed that parents showed {\ >< • ; cross compatibility. Significant positive heterotic vigour over better parent was exhibited for the number of leaves, number of pods, length of pod and grain yield. Negative heterosis was noticed in the case of 100 seed weight. The magnitude of heterosis varied in different parental combinations. The heterosis in yield noticed is through heterosis in yeild components viz. number of branches per plant, number of pods per plant and number of clusters per plant.Item Genetic variability and correlations in cowpea Vigna Sinensis (L) savi(Kerala Agricultural University, 1979) Sreekumar, S G; Ramachandran Nair, Y; Saraswthy, P; Mary K George; Thomas, E J43 different genotypes of cowpea were grown in a Randomized block design with 2 replications during Khariff 1978. The different genetic parameters viz. coefficient of Phenotypic and genotypic variation, heritability in broad sense and genetic advance were calculated. The study revealed that all the characters showed positive phenotypic and genotypic correlations with yield. High heritability and genetic advance were noticed for 100 grain weight, yield of grain and yield of haulms. This indicate that selection based on the above characters will be very effective for the improvement of the crop.Item Path analysis in green gram (Phaseqlus Aureus Roxb.)(Kerala Agricultural University, 1979) Saraswathy, P; Sreekumar, S G; Thomas, E JItem Gamma ray induced economic mutations in groundnut(Kerala Agricultural University, 1988) Gigi K John; Sreekumar, S G; Gopinathan Nair, VItem Cause-effect relationship of cane and sugar yield components in sugarcane(Kerala Agricultural University, 1989) Gopinathan Nair, V; Sreekumar, S GThe cause and effect relationship of cane and sugar yield components studied in the plant crop performance of 48 hybrid varieties revealed that circumference of cane, number of millable canes per plot and length of cane had high direct contributions for cane yield. Pol percentage at 12th month had maximum direct effect on CCS percentage. Among the two components contributing to sugar yield, cane yield had maximum contribution rather than CCS percentage, thereby suggesting that increasing the cane yield through its components like circumference of cane, number of millable canes or length of cane, the sugar yield can also be increased, through correlated response.Item Variability and heritability of yield and quality components in the ratoon crop of sugarcane(Kerala Agricultural University, 1990) Sreekumar, S G; Gopinathan Nair, V; Sukumaran Nair, SEvaluation of the first ratoon crop of 48 hybrid sugarcane varieties in RED with three replications at the Sugarcane Research Station, Thiruvalla revealed that certain characters viz., germination count on the 45th day, shoot count on the 180th day, number of millable canes per plot and cane yield per plot had high genotypic coefficient or variation, heritability in the broad sense and genetic advance. Hence they are amenable to genetic improvement through selection and may be considered as dependable selection criteria for the improvement of cane and sugar yields in the first ratoon crop of sugarcane.Item Genetic evaluation of pre-release cultures and varieties of rice for yield, sheath blight and sheath rot diseases(Kerala Agricultural University, 1992) Sreekumar, S G; Gopinathan Nair, V; Balakrishnan Asan, R; Manikantan Nair, P
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