Studies on the Manifestation of Hybrid vigour and Combining Ability in Polyvoltine X Bivoltine (cross breed) Hybrids of Mulberry Silkworm Bombyx mori L.
نویسندگان
چکیده
منابع مشابه
An analysis of genetic variation and divergence in Indian tropical polyvoltine silkworm (Bombyx mori L.) genotypes
The genetic variation and diversity among fifty-eight polyvoltine silkworm genotypes was estimated by using ten economic traits. The results revealed that the single shell weight showed higher genetic variation such as PCV% (17.20%), GCV% (12.93%), and heritability (56.5%) followed by single cocoon weight, shell ratio and matured larval weight. The D2 (Mahalonobis? distance) statistics reveal...
متن کاملEffect of Salicylic Acid on Commercial Traits of the Bivoltine Crossbreed Races of the Silkworm, Bombyx mori L.
Topical application with 100, 200 and 300 ng/ml phytohormone salicyclic acid on commercial traits was analysed in bivoltine CSR2, CSR4 and CSR2XCSR4 crossbreed races of the silkworm, Bombyx mori L. The results showed that there was significant increase in larval weight female cocoon weight, male cocoon shell weight, and hatching percentage with 100 and 200 ng/ml, silkgland weight, female cocoo...
متن کاملFitness components of bivoltine breed CSR2 after introgression of multivoltine thermotolerance character of silkworm Bombyx mori L
Bivoltine rearing in tropical regions is highly unpredictable due to fluctuating temperature and humidity conditions. It is therefore extremely imperative to develop a stable bivoltine cocoon crop under adverse environment of the tropices. Improvement of the existing bivoltine lines through introgression of true multivoltine tolerant factors by conventional backcross breeding strategy leading t...
متن کاملSeasonal Variation in Food Consumption, Assimilation, and Conversion Efficiency of Indian Bivoltine Hybrid Silkworm, Bombyx mori
Food consumption and utilization is influenced by various biotic and abiotic factors. Under different environmental, feeding, and nutritional conditions, and with ingestion of the same amount of mulberry leaves, the silkworm shows significant difference in its ability to digest, absorb, and convert food to body matter. Here, influences of season, temperature, and humidity on food intake, assimi...
متن کاملScreening Strains of the Mulberry Silkworm, Bombyx mori, for Thermotolerance
A tropical climate prevails in most of the sericultural areas in India, where temperature increases during the summer lead to adverse effects on temperate bivoltine silkworm rearing and cause crop losses. Screening for thermotolerance in the silkworm, Bombyxmori L. (Lepidoptera: Bombycidae) is an essential prerequisite for the development of thermotolerant breeds/hybrids. In the current study, ...
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ژورنال
عنوان ژورنال: International Journal of Industrial Entomology
سال: 2012
ISSN: 1598-3579
DOI: 10.7852/ijie.2012.24.1.007