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Implications of genetic diversity in the improvement of silkworm Bombyx mori L.
Ruiz, Ximena & Almanza, Martha
Abstract
Improvement programs depend on characterizing genetic resources, this process being the fundamental basis for
determining the diversity and genetic divergence of such resources and thereby enabling a rigorous, efficient selection
of the parentals that, through hybridization, will go on to enhance heterosis. The aim was to use the resulting hybrids to
improve population mean with respect to genetic parameters used for the qualitative and quantitative traits that affect
commercial natural silk production. Bombyx mori L. is a domesticated insect of global economic importance, mainly
due to the production of natural silk but also for its relevance in rural agro-industry in tropical and subtropical regions.
Non-textile uses currently being developed are also to the fore. These relate to such fields as science and academia,
biomedicine, biotechnology, the pharmacological industry and cosmetics. With this in mind, the aim of the current article
was to provide a general context for sericulture and in so doing give an overview of the silk production scenario nationally
and go on to describe the importance of genetic diversity to silkworm breeding programs and to demonstrate how genetic
drift, inbreeding, and artificial selection contribute to loss of genetic diversity in B. mori.
Keywords
Cauca; genetic divergence; genetic improvement; sericulture
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