sea urchin, Strongylocentrotus intermedius

sea urchin (Strongylocentrotus interme) image from www.rimi.or.jpResearch on estimates of genetic parameters for growth traits of the sea urchin, Strongylocentrotus intermedius is available for free download.

There is no published information about heritabilities or genetic correlations for any trait in the sea urchin. This study investigates heritability and genetic correlations for growth traits in sea urchin at 8, 10, and 12 months after metamorphism, a continuation of studies on heritability of growth at juvenile stages of sea urchins Strongylocentrotus intermedius.

The authors, Xiao-lin Liua, Ya-qing Chang, Jian-hai Xiang, and Xue-bin Cao, introduce the report with:

Genetic improvement of breeding stocks becomes more and more important in aquaculture. Even slight improvement in body weight and size would be a major advance since body size at a certain age is a common performance trait in breeding programs. Heritability and genetic correlation are two important parameters, which measure the relative magnitude of additive genetic variation for a trait and covariation between traits. Henderson’s (1973) pioneering work provided a technique that enabled separation of genetic and environmental effects when predicting cattle breeding values. The technique now dominates analysis of data from livestock improvement schemes, both in prediction of breeding values and estimation of genetic parameters.


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