scholarly journals Evaluation of Matured Larval Weight and Larval Duration of New Breeding Lines of Bombyx mori L

2021 ◽  
Vol 8 (10) ◽  
pp. 7-16
Author(s):  
Manjula A. C ◽  
Jenifer Lolita. C ◽  
Shubha Shubha ◽  
Prathibha K.Y ◽  
Keshamma E
Keyword(s):  
Bombyx Mori ◽  
Climatic Conditions ◽  
Sampling Errors ◽  
Random Drift ◽  
Breeding Lines ◽  
Anova Table ◽  
The Mean ◽  
Bombyx Mori L ◽  
Mulberry Silkworm ◽  
Selection Of

We planned to conduct this study with the main aim to develop bivoltine breeds for our tropical climatic conditions by using silkworm breeds with known genetic backgrounds (KA, NB18 and PM) in various hybrid combinations and incorporating them over generations, followed by backcrossing and adequate selection of different generations with the objective of profitability and productivity. The isolated Bivoltin lines (R1 and R2) were reared with their parental races at different times of the year to evaluate their stability in the expression of commercial traits. For the present breeding program, the purebred Bivoltine Kalimpong-A (KA), which spin white oval cocoons, New Bivoltine18 (NB18) white cocoons with rotating dumbbells and Multivoltine Pure Mysore (PM), the yellow pointed cocoons of the mulberry silkworm Bombyx mori L., Selected. One-way and three-way crosses were made using the above three breeds. The first single cross comprised KA females and PM males. The second unique cross comprised NB18 females and PM males. Selection was performed at the egg, larva, pupal, and cocoon stages over the course to determine the desired traits. The offspring of F from the respective crosses were backcrossed with their respective bivoltine males to improve commercial traits. Heterosis in the F1 generations of crosses, including NB18 and PM, was determined by the mean score of the parents (MPV) and the best score of the parents (BPV). A significant test for heterosis was performed using a standard ANOVA table. Based on the results of our study, it was found that the performance of the characters, viz. The weight of mature larvae and the duration of the larvae over generations do not simply increase or decrease regularly, but fluctuate irregularly. The reason for this variation may be due to random genetic drift, sampling errors in estimating generational means, selection pressures, and environmental factors. Therefore, inbreeding variations due to random drift and sampling errors could be reduced by increasing the number sampled and selected.

scholarly journals Effect of Thermal Processing on Physico-Chemical and Antioxidant Properties in Mulberry Silkworm (Bombyx mori L.) Powder

Foods ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 871 ◽  
Author(s):  
Artorn Anuduang ◽  
Yuet Ying Loo ◽  
Somchai Jomduang ◽  
Seng Joe Lim ◽  
Wan Aida Wan Mustapha
Keyword(s):  
Bombyx Mori ◽  
Thermal Processing ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Hot Water ◽  
Frap Assay ◽  
Drying Temperature ◽  
Bombyx Mori L ◽  
Mulberry Silkworm ◽  
Silkworm Bombyx Mori

The mulberry silkworm (Bombyx mori L.) is a common edible insect in many countries. However, the impact of thermal processing, especially regarding Thai silkworm powder, is poorly known. We, therefore, determined the optimum time for treatment in hot water and subsequent drying temperatures in the production of silkworm powder. The silkworms exposed to 90 °C water for 0, 5, 10, 15, and 20 min showed values of Total Phenolic Compounds (TPCs), 2,2-Diphenyl-1-picrylhydrazyl free radical scavenging (DPPH) assay, 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay, and Ferric Reducing Antioxidant Power (FRAP) assay that were significantly (p < 0.05) higher at the 5 min exposure time compared with the other times. The reduction of microorganisms based on log CFU/g counts was ≥3 log CFU/g (99%) at the 5 min treatment. To determine the optimum drying temperature, the silkworms exposed to 90 °C water for 5 min were subjected to a hot-air dryer at 80, 100, 120, and 140 °C. The TPC value was the highest (p < 0.05) at 80 °C. The silkworm powder possessed significantly (p < 0.05) higher DPPH, ABTS radical scavenging ability, and ferric ion reducing capability (FRAP assay) at 80 °C compared with other drying temperatures. This study indicates that shorter exposure times to hot water and a low drying temperature preserve the antioxidant activities. High antioxidant activities (in addition to its known protein and fat content) suggest that silkworms and silkworm powder can make a valuable contribution to human health.

Correlation between yield and biochemical parameters in the mulberry silkworm,Bombyx mori L

1993 ◽  
Vol 87 (3) ◽  
pp. 385-391 ◽  
Author(s):  
S. N. Chatterjee ◽  
C. G. P. Rao ◽  
G. K. Chatterjee ◽  
S. K. Ashwath ◽  
A. K. Patnaik
Keyword(s):  
Bombyx Mori ◽  
Biochemical Parameters ◽  
Bombyx Mori L ◽  
Mulberry Silkworm ◽  
Silkworm Bombyx Mori

Antiviral activity in the mulberry silkworm, Bombyx mori L.

2006 ◽  
Vol 7 (S2) ◽  
pp. 350-356 ◽  
Author(s):  
Hui-peng Yao ◽  
Xiao-feng Wu ◽  
K. Gokulamma
Keyword(s):  
Antiviral Activity ◽  
Bombyx Mori ◽  
Bombyx Mori L ◽  
Mulberry Silkworm ◽  
Silkworm Bombyx Mori

scholarly journals Selection of the Silkworm Bombyx mori L. Breeding Resource Material

2018 ◽  
Vol 7 (2) ◽  
pp. 1612-1617
Author(s):  
Shabir A. Bhat ◽  
Malik Farooq ◽  
I.L. Khan ◽  
F.A. Kukiloo ◽  
K.A. Sahaf
Keyword(s):  
Bombyx Mori ◽  
Bombyx Mori L ◽  
Resource Material ◽  
Silkworm Bombyx Mori ◽  
Selection Of

scholarly journals Genetic characterization of silkworm (Bombyx mori L.) strains (Lepidoptera: Bombicidae) with different geographical origin on the basis of isozyme markers

2020 ◽  
Vol 42 ◽  
pp. e47970
Author(s):  
Teodora Atanasova Staykova ◽  
Panomir Ivanov Tzenov ◽  
Yolanda Bogdanova Vasileva ◽  
Sibel Djevdet Aziz ◽  
Evgenya Neshova Ivanova ◽  
...  
Keyword(s):  
Bombyx Mori ◽  
Geographical Origin ◽  
Null Alleles ◽  
Economic Significance ◽  
Geographical Regions ◽  
Hardy Weinberg Equilibrium ◽  
Bombyx Mori L ◽  
Almost All ◽  
Mulberry Silkworm ◽  
Silkworm Bombyx Mori

The aim of the present study was to assess genetics variations within and among strains with different geographical origin, belonging to Bulgarian germplasm bank of mulberry silkworm (Bombyx mori L.) and to establish their relationships using isoenzyme markers. Polyacrilamide gel electrophoresis (PAGE) was used to study the isoenzymes of nonspecific esterases (EST), malate dehydrogenase (MDH) and acid phosphatase (ACP) from haemolymph, phosphoglucomutase (PGM) and hexokinase (HK) from silk glands and alkaline phosphatase (ALP) from midgut of mulberry silkworm (Bombyx mori L.). Variability was evident in all of these enzyme systems among twelve strains from Bulgarian germplasm resources of B. mori. Total of nine loci were detected. All of them (100%) were polymorphic. “Null” alleles in four loci were determined. Intra- and inter-strain polymorphism was obtained. The degree of polymorphism ranged from 0% to 77.80%. Low levels of observed heterozygosity in comparison with the expected one have been calculated in almost all of strains as well as deviations from Hardy-Weinberg equilibrium in almost all analyzed loci, resulting of excess of homozygotes. The value of FST was 0.4903. The dendrogram constructed with the values of genetic distance manifests that Romanian strain Cislau Tokay is formed one main clade while the rest strains studied (from Bulgaria, Japan, China, Vietnam, Spain, Syria and Egypt) are formed the other clade with subclades. The genetic data of the tested strains from different geographical regions, would be used for identifying suitable parents for breeding programs with a view to yield improvement in this species with economic significance.

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