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Inbreeding Effects on Quantitative Traits in Random Mating and Selected Populations of the Mulberry Silkworm, Bombyx mori

Journal of Insect Science, 2012, Vol.12 (140), p.1-6 [Peer Reviewed Journal]

This is an open access paper. We use the Creative Commons Attribution 3.0 license that permits unrestricted use, provided that the paper is properly attributed. ;COPYRIGHT 2012 Copyright belongs to the author under Creative Commons Attribution 2.5. Full-text article available at no cost at www.insectscience.org. ;COPYRIGHT 2012 Oxford University Press ;2012 2012 ;ISSN: 1536-2442 ;EISSN: 1536-2442 ;DOI: 10.1673/031.012.14001 ;PMID: 23461728

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Title:
Inbreeding Effects on Quantitative Traits in Random Mating and Selected Populations of the Mulberry Silkworm, Bombyx mori
Author: Doreswamy, Jamuna ; Gopal, Subramanya
Subjects: Animals ; Bombycidae ; Bombyx - genetics ; Bombyx - growth & development ; Bombyx - physiology ; Bombyx mori ; breeding ; Data processing ; Genetic aspects ; germplasm ; germplasm centre ; Inbreeding ; inbreeding coefficient ; inbreeding depression ; Larva - genetics ; Larva - growth & development ; Larva - physiology ; larvae ; Likelihood Functions ; Metamorphosis, Biological ; Models, Genetic ; moths ; Multifactorial traits ; multivoltine habit ; pedigree ; population ; Pupa - genetics ; Pupa - growth & development ; Pupa - physiology ; pupation ; Quantitative Trait, Heritable ; quantitative traits ; races ; random mating ; REML ; residual maximum likelihood method ; Sexual behavior ; Sexual Behavior, Animal ; Silkworms ; statistical models
Is Part Of: Journal of Insect Science, 2012, Vol.12 (140), p.1-6
Description: The objective of the present study was to estimate the level of inbreeding coefficient during inbreeding of the pedigree of random mating and selected populations of two distinct races of mulberry silkworm, Bombyx mori (Lepidoptera: Bombycidae), in the silkworm germplasm. The six generation data of the two races, namely multivoltine Pure Mysore and bivoltine NB4D2, were studied for inbreeding depression coefficient using the residual maximum likelihood method, utilizing two statistical models by analyzing six quantitative traits, namely, larval weight, cocoon weight, shell weight, shell ratio, pupation rate, and filament length. The results of the present experiment demonstrated that the inbreeding coefficient was significant in Model 1 for most of the economic traits in the random mating populations of both the races compared to those of selected populations. These results suggest that during stock maintenance, application of rigid selection for increased numbers of generations helps to retain original characteristics of the pure races while reducing the deleterious effects of inbreeding. The significance of inbreeding coefficient is discussed with reference to the inbreeding of silk moths in the silkworm germplasm.
Publisher: United States: University of Wisconsin Library
Language: English
Identifier: ISSN: 1536-2442
EISSN: 1536-2442
DOI: 10.1673/031.012.14001
PMID: 23461728
Source: Oxford Journals Open Access Collection
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Inbreeding Effects on Quantitative Traits in Random Mating and Selected Populations of the Mulberry Silkworm, Bombyx mori

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