Scope for Region and Season Specific Mulberry Silkworm (Bombyx mori L) in Temperate Regions of Jammu and Kashmir A B S T R A C T (original) (raw)
Related papers
2020
Article Details: Received: 2020-02-23 | Accepted: 2020-04-08 | Available online: 2020-06-30 https://doi.org/10.15414/afz.2020.23.02.85-93 This study is aimed at proposing mulberry sericulture as an alternative to strengthen the agricultural economy of Hooghly district of West Bengal, India. Exploration of four breeds of mulberry silkworm, Bombyx mori (Linnaeus, 1758), popular in West Bengal (viz., two multivoltine breeds – Nistari Plain and Nistari Marked, One Bivoltine breed – SK6 X SK7 hybrid and one F1 Hybrid from cross between Nistari Plain and SK6 X SK7 hybrid) have been conducted in the Sericulture Research Laboratory, Post Graduate department of Zoology, Hooghly Mohsin College, Chinsurah, Hooghly, West Bengal, India, for three consecutive years (2016-2019) for various rearing parameters (viz., larval duration, matured larval weight, cocoon weight, shell weight, shell ratio , effective rate of rearing , absolute silk content and yield) along with common meteorological data (vi...
The present study was undertaken to evaluate the performance of eleven bivoltine silkworm, Bombyx mori L, breeds (CSR2, CSR6, CSR27, CSR26, CSR50, PAM114, PAM117, APS4, APS5, SK6 and SK7) of different origin under temperate climatic conditions during spring, summer and autumn, 2018 at Central Sericultural Research and Training Institute, Pampore, Jammu and Kashmir. The rearing was carried out under uniformed laboratory condition by adopting the standard method. These eleven breeds were evaluated for their performance in eight metric traits viz., fecundity (No.), hatching (%), yield per 10,000 larvae by number and by weight (kg), single cocoon weight (g), single shell weight (g), shell ratio (%) and pupation rate (%). The performance of breeds varied from season to season since they originated from different progenitors. The data generated was analyzed statistically and subjected to multiple trait Evaluation index (E.I). On the basis of the evaluation index values ranking CSR2, CSR26, CSR27, CSR50, PAM114 and PAM117 performed well in all the three seasons with E.I values above 50. Two breeds APS5 and CSR6 recorded E.I values below 50 in all the three seasons. APS4 has performed well in only spring season whereas SK6 and SK7 recorded E.I values above 50 in summer and autumn only. Based on their performance in all the three seasons, these parental breeds will be utilized for development of foundation crosses which will be further shortlisted for the development of bivoltine silkworm double hybrids suitable to temperate region of J&K as an alternate for ruling CSR double hybrid.
The present investigation was carried out to improve the selected quantitative traits under uniform laboratory conditions utilizing twenty five breeding lines (BL) of silkworm Bombyx mori L. during autumn season, 2017 in temperate climatic conditions of Kashmir. The breeding lines were reared over five generations and data were recorded as per the standard procedure for the calculation of all the quantitative traits namely, Fecundity (no.), hatching percentage, yield by number & weight (kg)/ 10,000 larvae brushed, single cocoon weight (g), single shell weight (g), shell ratio (%) and pupation rate (%). The data generated were subjected to the multiple trait evaluation index and among all the breeding lines, eighteen lines viz., L-1, L-2, L-3, L-4, L-6, L-7, L-11, L-12, L-14, L-15, L-16, L-7, L-18, L-19, L-20, L-21, L-22 and L-24 exhibited better performance with >50 evaluation index values, L-4 & L-9 observed moderate and L-8, L-10, L-13, L-23 & L-25 recorded least evaluation index during autumn season. Based on the results obtained from the study, the traits differences were observed between the twenty five breeding lines to be considered as the variable effects among the lines during autumn season. It is found that, the 18 lines with >50 evaluation index values have shown significant influence on the expression of quantitative traits and have economical importance under the study. Hence, obtained results from the study will conveniently be utilized for selecting best breeding lines for evolving suitable breeds during autumn season in temperate region of the Kashmir and will be helpful in the field of silkworm breeding and genetics programmes.
Success of silkworm breeding largely depends upon the initial selection of parents, their effective utilization in desirable combination followed by appropriate selection procedures. Silkworm breeders across the country contributed significantly to the development of many bivoltine breeds not only with improved economic parameters but also having suitability for variable climatic conditions. With this aim, the study was carried out to evaluate the performance of the nineteen bivoltine silkworm genotypes viz., Chaung Naung, Sanish-18(M), Pam 114, Pam 117, CSR2, CSR6, CSR26, CSR27, CSR47, S8, N5, SK-6, SK-7, B.Con-1, B.Con-4, Dun-6, Dun-22, APS-4 and APS-5 evolved/maintained by different breeding institutes of India. The evaluation of the selected genotypes was carried out for various traits during spring (May-June), summer (July-August) and autumn (August-September) season 2018 at Central Sericultural Research and Training Institute, Central Silk Board, Pampore, Kashmir. On the basis of the evaluation index values ranking, the high performing silkworm genotypes were identified for spring, summer and autumn seasons which will serve as breeding resource material for further identification of season-specific hybrids for Kashmir Division of J&K state. The study revealed that genotypes Pam 117, CSR 2 and CSR 27 performed better in all the three rearing seasons’ viz., spring, summer and autumn.
Host plant diversity of non-mulberry silkworms: A review
Journal of Pharmacognosy and Phytochemistry, 2020
Based on the feeding behaviour of silkworms, sericulture can be broadly classified into mulberry and non-mulberry. Non-mulberry silk is also termed as ‘Vanya’ silk or Wild silk which is mostly common among the traditional rearers. Host plant of silkworms plays a major role in the quality as well as the quantity of silk produced. The non-mulberry silkworms are eri (Samia ricini), Muga (Antheraea assama), temperate tasar (Antherara myllita) and tropical tasar (Antherara proylei). Since non-mulberry silkworms are polyphagous in nature, thus on the basis of host plant preference the host plants can be classified as primary, secondary and tertiary. Non-mulberry sericulture is mostly practised by the tribal and local community. They depend upon this sector for their livelihood. Therefore, a keen knowledge of the host plants will help the farmers to increase the number of rearing cycles in a year which in turn will lead to increase in the productivity and yield.
Journal of Experimental Agriculture International
Sericulture is a commerce that involves the cultivation of mulberry plant species, the raising of silkworms, and the manufacture of silk. It is a sustainable, eco-friendly, and agricultural focused commerce. It is one of the largest employment industries, and it has played a significant role in rural opportunities and financial progress. The silkworm is the greatest mulberry assessor since different mulberry types differ in numerous characteristics. Criteria for assessment have been created using a bioassay of silkworm larvae. The impact of a specific mulberry variety on a certain silkworm hybrid may be assessed based on growth/development, survival, and eventually cocoon generation, which directly influences silk productivity.