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Electrophoretic Analysis of Haemolymph Proteins during Silkworm (Bombyx mori L.) Ontogenesis
Staykova, Teodora Korean Society of Sericultural Science 2007 International Journal of Industrial Entomology Vol.14 No.1
A study was made of the haemolymph protein spectrum of mulberry silkworm (Bomhyx mori L.) from the first larval instar to imago. Horizontal starch gel electrophoresis was used. Sixteen races and eight F1 interracial hybrids, raised in Bulgaria, were analyzed. During the ontogenesis, a total of 17 protein bands (15 cathodic and 2 anodic) were detected. Distinct dynamics in the haemolymph protein spectrum was observed, in result of different expression during the individual development associated with the processes of growth, histolysis and histogenesis. Based on the ontogenetic dynamics found, a correspondence was assumed between some proteins detected by us using the starch gel electrophoresis and major haemolymph proteins (SP1, SP2, MHPs and Vg) detected by other authors using the polyacrilamide gel electrophoresis. Intraracial and interracial polymorphism was observed in four protein zones. The effect of four polymorphic loci with codominant and null alleles was suggested.
Isoelectric Focusing of the Hemolymph Proteins of the Silkworm, Bombyx mori
Teodora Staykova,Petar Popov,Dimitar Grekov,Petia Terzieva 한국잠사학회 2004 International Journal of Industrial Entomology Vol.8 No.1
Soluble proteins of silkworm hemolymph were investigated by means of isoelectric focusing (IEF). The protein spectra during ontogenesis of races and interraces hybrids kept in Bulgaria was studied. A total of 51 protein bands in the hemolymph from fourth larval instar to imago were ascertained. Stage specific expression was established. The specific expression of some protein bands in the individual spectra manifest phenotype of gene determinate polymorphism (HP F, HP J, HP K, HP L, HP Q - in the zone with pH gradient 3.5 ~ 6.2 and HP K, HP L, HP N, HP P, HP T - in the zone with pH gradient 9.5 ~ 6.2). Breed specific expression was observed. On the basis of the obtained results, it was established that the investigated breeds are heterogeneous and the isoelectric focusing method is successful when specifying the inner-race and interrace polymorphism in silkworm.
Staykova, Teodora,Grekov, Dimitar,Panayotov, Mihail Korean Society of Sericultural Science 2004 International Journal of Industrial Entomology Vol.9 No.1
By using PAGE, a study was made on the nonspecific esterase spectra of female genital organs and eggs in Bombyx mori L. The expression of 11 esterase bands was detected during ontogenesis of races and inter-races hybrids kept in Bulgaria. The gene activity of 9 esterase loci was assumed. Esterases specific for the spectrum of diapausing eggs were observed. In two esterase zones, intra- and inter-breed polymorphism was found. Based on the same breed specific expression, the existence of correspondence between esterase bands from spectra of different silkworm tissues and organs was suggested. Stage-specific expression of esterases in female genital glands, indicative of differentiated gene activity during ontogenesis, was established.
Sort Communication : Isoelectric Focusing of the Hemolymph Proteins of the Silkworm, Bombyx mori
( Teodora Staykova ),( Petar Popov ),( Dimitar Grekov ),( Petia Terzieva ) 한국잠사학회 2007 International Journal of Industrial Entomology Vol.8 No.1
Soluble proteins of silkworm hemolymph were investigated by means of isoelectric focusing (IEF). The protein spectra during ontogenesis of races and inter-races hybrids kept in Bulgaria was studied. A total of 51 protein bands in the hemolymph from fourth larval instar to imago were ascertained. Stage specific expression was established. The specific expression of some protein bands in the individual spectra manifest phenotype of gene determinate polymorphism (HP F, HP J, HP K, HP L, HP Q - in the zone with pH gradient 3.5~6.2 and HP K, HP L, HP N, HP P, HP T - in the zone with pH gradient 9.5 ~6.2). Breed specific expression was observed. On the basis of the obtained results, it was established that the investigated breeds are heterogeneous and the isoelectric focusing method is successful when specifying the inner-race and inter-race polymorphism in silkworm.
Electrophoretic Analysis of Haemolymph Proteins during Silkworm (Bombyx mori L.) Ontogenesis
( Teodora Staykova ) 한국잠사학회 2007 International Journal of Industrial Entomology Vol.14 No.1
A study was made of the haemolymph protein spectrum of mulberry silkworm (Bombyx mori L.) from the first larval instar to imago. Horizontal starch gel electrophoresis was used. Sixteen races and eight Fl interracial hybrids, raised in Bulgaria, were analyzed. During the ontogenesis, a total of 17 protein bands (15 cathodic and 2 anodic) were detected. Distinct dynamics in the haemolymph protein spectrum was observed, in result of different expression during the individual development associated with the processes of growth, histolysis and histogenesis. Based on the ontogenetic dynamics found, a correspondence was assumed between some proteins detected by us using the starch gel electrophoresis and major haemolymph proteins (SP1, SP2, MHPs and Vg) detected by other authors using the polyacrilamide gel electrophoresis. Intraracial and interracial polymorphism was observed in four protein zones. The effect of four polymorphic loci with codominant and null alleles was suggested.
Isoelectric Focusing of the Hemolymph Proteins of the Silkworm, Bombyx mori
Staykova, Teodora,Popov, Petar,Grekov, Dimitar,Terzieva, Petia Korean Society of Sericultural Science 2004 International Journal of Industrial Entomology Vol.8 No.1
Soluble proteins of silkworm hemolymph were investigated by means of isoelectric focusing (IEF). The protein spectra during ontogenesis of races and inter-races hybrids kept in Bulgaria was studied. A total of 51 protein bands in the hemolymph from fourth larval instar to imago were ascertained. Stage specific expression was established. The specific expression of some protein bands in the individual spectra manifest phenotype of gene determinate polymorphism (HP F, HP J, HP K, HP L, HP Q - in the zone with pH gradient 3.5-6.2 and HP K, HP L, HP N, HP P, HP T - in the zone with pH gradient 9.5 - 6.2). Breed specific expression was observed. On the basis of the obtained results, it was established that the investigated breeds are heterogeneous and the isoelectric focusing method is successful when specifying the inner-race and inter-race polymorphism in silkworm.
Jolanda Bogdanova Vasileva,Teodora Atanasova Staykova,Panomir Ivanov Tzenov 한국잠사학회 2009 International Journal of Industrial Entomology Vol.18 No.2
The purpose of this study was to establish whether there are differences in the productivity of the same silkworm (Bombyx mori L.) parthenoclones, obtained by two different methods-thermal and combined, as well as to study their genotype structure by several enzyme loci. It was established that all individuals of parthenoclones Joana, Joana (↓↑), Pohi and Pohi (↓↑), are homozygous by the studied esterase and phosphoglucomutase loci, which substantiated the clones` genetic stability. By comparative analysis of some biological and technological properties, it was found that parthenoclone Pohi (↓↑) obtained by low-high temperature activation is characterized by higher values of these properties as compared to parthenoclone Pohi obtained by thermal parthenogenesis. Comparing the two methods of inducing ameiotic parthenogenetic development, we would recommend that parthenoclone Joana is sustained by thermal parthenogenesis, and parthenoclone Pohi-by the combined method (low-high temperature).
Vasileva, Jolanda Bogdanova,Staykova, Teodora Atanasova,Tzenov, Panomir Ivanov Korean Society of Sericultural Science 2009 International Journal of Industrial Entomology Vol.18 No.2
The purpose of this study was to establish whether there are differences in the productivity of the same silkworm(Bombyx mori L.) parthenoclones, obtained by two different methods-thermal and combined, as well as to study their genotype structure by several enzyme loci. It was established that all individuals of parthenoclones Joana, Joana(${\downarrow}{\uparrow}$), Pohi and Pohi(${\downarrow}{\uparrow}$), are homozygous by the studied esterase and phosphoglucomutase loci, which substantiated the clones' genetic stability. By comparative analysis of some biological and technological properties, it was found that parthenoclone Pohi(${\downarrow}{\uparrow}$) obtained by low-high temperature activation is characterized by higher values of these properties as compared to parthenoclone Pohi obtained by thermal parthenogenesis. Comparing the two methods of inducing ameiotic parthenogenetic development, we would recommend that parthenoclone Joana is sustained by thermal parthenogenesis, and parthenoclone Pohi-by the combined method (low-high temperature).