21521139
not annotated - annotated - LINNAEUS only
A review of the implications of heterozygosity and inbreeding on germplasm biodiversity and its conservation in the silkworm, Bombyx mori.
Abstract Silkworm genebanks assume paramount importance as the reservoirs of biodiversity and source of alleles that can be easily retrieved for genetic enhancement of popular breeds. More than 4000 Bombyx mori L (Lepidoptera: Bombycidae) strains are currently available and these strains are maintained through continuous sibling mating. This repeated sibling mating makes the populations of each strain more homozygous, but leads to loss of unique and valuable genes through the process of inbreeding depression. Hence, it is essential to maintain a minimal degree of heterozygosity within the population of each silkworm strain, especially in the traditional geographic strains, to avoid such loss. As a result, accurate estimation of genetic diversity is becoming more important in silkworm genetic resources conservation. Application of molecular markers help estimate genetic diversity much more accurately than that of morphological traits. Since a minimal amount of heterozygosity in each silkworm strain is essential for better conservation by avoiding inbreeding depression, this article overviews both theoretical and practical importance of heterozygosity together with impacts of inbreeding depression and the merits and demerits of neutral molecular markers for measurements of both heterozygosity and inbreeding depression in the silkworm Bombyx mori.
Ann file
T1 Species 116 124 silkworm
N1 Reference T1 Taxonomy:7091
T2 Species 126 137 Bombyx mori
N2 Reference T2 Taxonomy:7091
T3 Species 150 158 Silkworm
N3 Reference T3 Taxonomy:7091
T4 Species 340 351 Bombyx mori
N4 Reference T4 Taxonomy:7091
T5 Species 756 764 silkworm
N5 Reference T5 Taxonomy:7091
T6 Species 927 935 silkworm
N6 Reference T6 Taxonomy:7091
T7 Species 1138 1146 silkworm
N7 Reference T7 Taxonomy:7091
T8 Species 1486 1494 silkworm
N8 Reference T8 Taxonomy:7091
T9 Species 1495 1506 Bombyx mori
N9 Reference T9 Taxonomy:7091