2. Institutional Publications

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Author: search.filters.author.Sverup John

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    New techniques of selfing and crossing in sesame
    (Kerala Agricultural University, 1981) Sverup John; Gopinathan Nair, V
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    Genetic analysis of multiloculed pod character in sesame
    (Kerala Agricultural University, 1981) Sverup John; Gopinathan Nair, V
    Genetic analysis of he multiloculed condition in sesame was undertaken. Four multiloculed types isolated from a varietal collection and the four loculed type (Kayamkulam-1) were crossed in all passible combinations. The pod type in the hybrids was compared with that of the parents and conclusions drawn. The multiloculed condition was recessive to the four loculed condition. Estimation of the number of genes responsible for this character revealed the operation of two independent recessive genes symbolised as i ' and 'I/. Either of these in hoTiozygous condition produced multilocular expression. Presence of these two genes together in a genotype in the double recessive condition can produce a better expression of this character.
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    Genetic analysis of multicapsuled character in sesame
    (Kerala Agricultural University, 1983) Sverup John; Gopinathan Nair, V
    Genetic analysis of the multicapsuled condition in sesame was undertaken. Six multicapsuled types isolated from a varietal collection and a single capsuled type were crossed in all possible combinations. The capsule type in the hybrids was compared to that of the parents and conclusions drawn. The multicapsuled condition was recessive to single capsuled condition. Estimation of the Viumber of genes responsible for this character revealed the operation of two independent recessive genes symbolised as 'p1' and 'p/. Either of these genes together in a genotype in the double recessive condition can produce a better expression of this character
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    Two new sesame varieties for Kerala
    (Kerala Agricultural University, 1989) Sverup John; Abdul Khader, K M; Geetha, P; Gopinathan Nair, V
    ACV-1 and ACV-2 are the two new sesame varieties released in Kerala recently. These varieties were evolved by pureline selection from germplasm types P38 (a Punjab variety) and No.42 (a West Bengal variety) respectively. ACV-1 (selection No. 38-1) was released as 'Soma' for summer rice fallows. This has multiloculed capsules having white bold seeds with substantial increase in seed yield over the standard variety, Kayamkulam 2. ACV-2 (Selection No.42-1) was released as 'Surya' for the rabi uplands. This variety also has multiloculed capsules having grey bold seeds with significant increase in seed yield over Kayamkulam 2.
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    Inter-relations of yield and its components in sesame
    (Kerala Agricultural University, 1990) Sverup John; Gopinathan Nair, V
    One hundred sesame types were evaluated in replicated trials in rice fallows. There was positive and significant genotypic correlation of yield of seeds with number of capsules on branches, number of capsules per plant, number of branches, number of fruiting axils per unit length and weight of 1000 seeds. Number of days to flowering, maturing, height of the plant, height up to first capsule, length and circumferance of capsule and number of seeds per capsule exerted negative and significant genotypic correlation with yield of seeds. The quality characters such as seed oil content and seed protein content did not have significant genotypic correlation with yield of seeds. The maximum positive direct effects on yield of seeds was exerted through number of capsules per plant followed by number of branches. The indirect effects of other characters via. these characters on yield of seeds were considerable. Hence it can be inferred that number of capsules per plant and number of branches are to be given importance in selection programme. The proposed plant architecture for higher productivity during summer can be dwarf in stature, profuse branching, early flowering and maturing, bearing large number of capsules with large sized seeds.
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    Genetic variability, heritability and genetic advance in sesame
    (Kerala Agricultural University, 1993) Sverup John; Gopinathan Nair, V
    One hundred sesame genotypes were evaluated in a simple lattice design at the College of Agriculture, Vellayani, Trivandrum during rabi in uplands. The data collected on yield and component characters were statistically analysed and genetic parameters viz., GCV, H and genetic advance were estimated. High values of GCV, H and genetic advance were obtained for the yield component characters such as number of capsules on main stem, number of branches and number of capsules on branches. Selection for these characters during rabi will therefore be effective for crop improvement.
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    Sneha, an improved variety of groundnut for uplands
    (Kerala Agricultural University, 2000) Suma Bai, D I; Manju, P; Sverup John; Wilson, D; Gopimony, R; Vijayagopal, P D
    Initial evaluation trials (lETs) were conducted with 18 superior types and 18 extra early segregants from the Fs progenies during 1993. From the lETs, seven high yielding types and nine high yielding, extra early progeny bulks were selected and subjected to CYTs during kharif 1994 and 1995 at the College of Agriculture, Vellayani, Thiruvananthapuram along with check varieties. Two promising types, VGE-551 and 1SKO-8805 with high yield and two cultures, Culture 15 and Culture 18 with high yield and early maturity were advanced to farm trials along with TMV 2 and local check at nine locations in Thiruvananthapuram district during kharif 1996. Culture 15 with high yield and early maturity was recommended for release as Sneha suitable for cultivation in the uplands of Thiruvananthapuram district.