Kasa Madhavi, Jolapuram Seetharamulu, Lima Anugata, Didugu Brinda Goda Lakshmi, Poosapati Jagannatha Raju, Mamillapalli Anitha
Bivoltine Silkworm Breeding Laboratory, Andhra Pradesh State Sericulture Research and Development Institute, Kirikera-515 211, Hindupur, AP, India.
Department of Biotechnology, School of Science, GITAM (Deemed to be University), Visakhapatnam 530 045, AP, India.
J Econ Entomol. 2023 Oct 10;116(5):1679-1688. doi: 10.1093/jee/toad126.
Sericulture has immense economic significance. Separating male and female silkworm pupae for egg production in grainage is a laborious task; hence, sex-limited breeds for cocoon color are advantageous for this process. The major constraint in sex-limited breeds is their low fecundity. Sex-limited female moths lay a lower number of eggs than nonsex-limited breeds. Polyamine, spermidine was shown to improve fecundity in several organisms, including the silkworm, Bombyx mori L. In the present study, cocoon color sex-limited breeds, HTO2SL, APS27SL, and SLFC27, were selected and fed with spermidine to improve fecundity and nutritional efficiency. The fifth-instar silkworm larvae of the selected breeds were subjected to standard rearing conditions with and without spermidine supplementation up to spinning. The spermidine-supplemented sex-limited breeds exhibited a significant increase in fecundity, nutritional indices, and economic parameters compared with the control sex-limited breeds. Among the 3 sex-limited breeds tested, the performance of APS27SL improved significantly.
养蚕业具有巨大的经济意义。在蚕种场中，将雄蚕蛹和雌蚕蛹分开用于产卵是一项艰巨的任务；因此，茧色限性品种在此过程中具有优势。限性品种的主要限制因素是其低繁殖力。限性雌蛾产卵数量比非限性品种少。多胺亚精胺已被证明可提高包括家蚕（Bombyx mori L.）在内的多种生物的繁殖力。在本研究中，选择了茧色限性品种HTO2SL、APS27SL和SLFC27，并用亚精胺喂养以提高繁殖力和营养效率。所选品种的五龄蚕幼虫在标准饲养条件下饲养，直至结茧，一部分添加亚精胺，一部分不添加。与对照限性品种相比，添加亚精胺的限性品种在繁殖力、营养指标和经济参数方面均有显著提高。在所测试的3个限性品种中，APS27SL的表现显著改善。
