ABSTRACT

The characterisation of cocoons is one of the most important requirements to know the economic importance of a sericigenous insect. Antheraea assamensis produces the golden muga silk, which is considered as the second most expensive silk in the world for its high quality. Although muga silk worm is a single species, it has many varieties with respect to its geographical areas. However, literary works on the most important economic traits connected to silk production of different populations of A. assamensis are very limited. Therefore, the present study has been aimed to know the cocoon efficiency and the silk quality of the different populations of the A. assamensis following the standard techniques. The study was performed after collecting the cocoon samples from 11 different regions of the North East India. The result showed that A. assamensis exhibit variation in cocoon colour along with other significant differences in the cocoon weight, shell weight, shell ratio and silk quality. The cocoons of the wild population recorded more cocoon weight, shell ratio, filament length and tenacity but at the same time due to the deposition of higher degree of calcium oxalate crystals on the cocoon surface, they were hard to reel. Based on these characters, the study recommended some stocks, which could be used for future breeding programme based on the genetic distance between the parents.

摘要

茧的特征是了解有毒昆虫的经济重要性的最重要要求之一。ther蚕（Antheraea assamensis）生产金色的穆加丝绸，其质量高被认为是世界上第二昂贵的丝绸。尽管mug蚕是单个物种，但就其地理区域而言，它具有许多变种。但是，有关最重要经济特征的文学作品与不同人口A的丝绸生产有关。阿萨姆松非常有限。因此，本研究的目的是了解A族不同种群的茧效率和丝质。阿萨姆松遵循标准技术。这项研究是在从印度东北部11个不同地区收集茧样品后进行的。结果表明：一。assamensis表现出茧色的变化以及茧重，壳重，壳比和丝质的其他显着差异。野生种群的茧记录了更多的茧重量，壳比，细丝长度和韧度，但同时由于在草茧表面沉积了较高程度的草酸钙晶体，它们很难卷取。根据这些特征，研究推荐了一些种群，这些种群可根据父母之间的遗传距离用于将来的育种程序。