2. Institutional Publications
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Item 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 Screening brinjal varieties for wilt resistance(Kerala Agricultural University, 1974) Gopimony, R; Mary K GeorgeThirty six brinjal varieties including two wild ones were screened against bacterial wilt disease at Agricultural College, Vellayani, during 1975- 1976. Twelve varieties which were found to be disease free in the preliminary trial were subjected to artificial wilt infection under replicated trials and found that only one variety namely S. melongena var. insanum (wild brinjal) was resistant to wilt. Dipping of seedlings in fresh bacterial ooze just before transplanting was found to be equally effective in inducing the disease compared to the more complicated artificial inoculation methods.Item Study of varietal performance of soya beans(Kerala Agricultural University, 1975) Mary K George; Chandramony, D; Manikantan Nair, PItem Cytological studies on four inter varietal crosses of capsicum annuum(Kerala Agricultural University, 1975) Manikantan Nair, P; Mary K GeorgeCytological studies of microsporocytes in four hybrids and five parents of the varieties of Capsicum annuum were conducted. Variety local blue was taken as the seed parent. The pollen parents Included varieties, Russian, Indian long red, Chinese g-'ant and Oskosh. All the four crosses revealed pronounced heterosis as regards pollea size. Further, all the hybrids manifested the presence of ring quadrivalents, chain quadrivalents, and trivalents while the hybrid local blue x Indian long red contained univalents, pycnotic behaviour, unequal distribution and anaphase bridges. The abnormal meiotic behaviour of microsporocytes had a positive correlation on the pollen sterility and affected the ultimate fruit set.Item Effect of 'planofix' foliar spraying on some varieties of capsicum(Kerala Agricultural University, 1976) Chandramony, D; Mary K GeorgeItem Comparative performance of f1 and parents in intervarietal crosses of rice(Kerala Agricultural University, 1977) Sreekumari Amma, J; Namboodiri, K M N; Mary K GeorgeThe behaviour of six characters on direct and reciprocal hybrids of two intervarietal crosses in rice was studied along with their parents and the following conclusions were drawn. There was a clear evidence of positive heterosis in plant height. The hybrids showed increase in plant height over the two parents. All the hybrids are significantly superior to both of the parents with respect to the total number of tillers produced. With regard to the number of nodes the hybrids did not show any significant difference over the parents. In the area of flag leaf the hybrids between Dee-Geo-Woo-Gen x Annapurna manifested positive heterosis while the reciprocal hybrids showed little heterosis. As regards the area of second leaf from the tip both the hybrids were not superior over the parents. But for the character of second leaf angle the hybrids were superior to their parents with reduced leaf angle. In general hybrids were better than the parents with respect to plant height, number of tillers, area of flag leaf and leaf angle.Item Studies on interspecific hybrids of five species of Capsicum with special reference to its qualitative and quantitative characters(Kerala Agricultural University, 1977) Somanatha Pillai, E R; Mary K George; Mercy, S TInvestigations on the inheritance of quantitative and qualitative characters and hetrosis among five species of Capsicum were carried out in the present study. Though crosses were made in all combinations, there was fruit setting in only ten crosses. Of these 2 crosses produced no viable seeds and in another cross, the seedlings did not survive. C anmtum as female parent failed to cross with any other species In the cross CF x CP, the embryo started normal development but collapsed in the early stage The F, hybrids exhibited heterosis for several economically desirable characters. All the hybrids showed a conspicuous reduction in the number and germination capacity of I1 ' , and I , seeds. Among the seven hybrids studied, the best economic combinations were Capsicum frutescens X C. baccatum and C. pendulum X C. microcarpum. These results indicate the possiblity of selecting desirable typss combining the economic attributes of both the parents from the segregating generations and by back crossing.Item Crossability studies and analysis of incompatibility in three species of capsicum(Kerala Agricultural University, 1977) Radhakrishnan, K P; Mercy, S T; Mary K GeorgeIn the present study interspecific hybridization could be successfully done among 3 species of Capsicum viz., C. annuum, C. fruiteseens and C. pendutum by the technique of cross pollination after amputation of the upper part of style along with the stigma followed by application of 5% sucrose solution on cut surface of the style. Embiyological analysis of the fertilized ovaries of self and cross combinations showed that in the incompatible combinations the embryosacs degenerated indicating failure of fertilisation. Further when pollination was done on the cut surface of the amputated styles after the application of 5% sucrose solution normal embryo development could be observed as in the case of selfed ovaries.Item Estimation of leaf area in greengram (Phaseolus Aureus Roxb) using linear parameters(Kerala Agricultural University, 1978) Sreekumar, S O; Thomas, E J; Saraswathy, P; Mary K GeorgeItem 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.