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Heat‐shock protein70 gene expression in four hatchery Pacific Abalone Haliotis discus hannai Ino populations using for marker‐assisted selection
Author(s) -
Cheng Peizhou,
Liu Xiao,
Zhang Guofan,
Deng Yuewen
Publication year - 2006
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2006.01559.x
Subject(s) - haliotis discus , biology , abalone , population , hybrid , heat shock protein , hsp70 , selection (genetic algorithm) , inbred strain , selective breeding , genetics , gene , botany , fishery , demography , sociology , artificial intelligence , computer science
Heat shock proteins (Hsps) are molecular chaperones that help organisms cope with stressful conditions. Here, we report on the growth rates and Hsp70 expressions in inbred and hybrid populations of abalone Haliotis discus hannai Ino. In abalone, inbred populations expressed more Hsp70 than hybrid populations at all temperatures, except at very high temperatures close to the physiological limit. At benign temperatures, there was a clear trend towards higher Hsp70 expression in inbred than hybrid populations, whereas at higher temperatures, a trend in the opposite direction was observed. The temperature of maximal Hsp70 expression ( T peak ) varied with the population type. The T peak of inbred populations (26°C) was lower than that of the hybrid populations (28°C). The maximal inducible Hsp70 of inbred populations was higher than that of hybrid populations. The results showed a trend towards higher expression in inbred population at a lower temperature. These results provide direct experimental evidence that hybrids can cope with the intrinsic stress even at non‐stressful temperatures. The constitutive Hsp70 may therefore be used for marker‐assisted selection in a breeding programme.