Estimation of the mode of inheritance of thermal tolerance in the guppy Poecilia reticulata

• Published in: Fisheries science Vol. 75; no. 3; pp. 683 - 687
• Main Authors: Nakajima, M.(Tohoku Univ., Sendai (Japan)), Fujisawa, K, Taniguchi, N
• Format: Journal Article
• Language: English
• Published: Japan Springer Japan 01.05.2009; Springer Nature B.V
• Subjects: Aquaculture; Biomedical and Life Sciences; Chromosomes; Comparative analysis; CYPRINODONTIFORMES; Females; Fish; Fish & Wildlife Biology & Management; Food Science; Freshwater; Freshwater & Marine Ecology; GENE; GENES; GENETIC INHERITANCE; GENETIC MARKERS; GENETIC VARIATION; Genetics; Guppy Poecilia reticulata; HEAT SHOCK PROTEINS; HEAT TOLERANCE; HEREDITE; HERENCIA GENETICA; High temperature; Life Sciences; Males; MARCADORES GENETICOS; MARQUEUR GENETIQUE; Maturation; METHODE STATISTIQUE; METODOS ESTADISTICOS; Offspring; Original Article; Parents & parenting; POECILIA; Poecilia reticulata; PROTEINAS DE SHOCK TERMICO; PROTEINE DE CHOC THERMIQUE; Sex-linked inheritance; STATISTICAL METHODS; Survival; TEMPERATURA DEL AGUA; TEMPERATURE DE L'EAU; Thermal stress; Thermal tolerance; TOLERANCE A LA CHALEUR; TOLERANCIA AL CALOR; VARIACION GENETICA; VARIATION GENETIQUE; WATER TEMPERATURE; X chromosome; Guppy; Thermal tolerance; X chromosome; Sex-linked inheritance
• ISSN: 0919-9268; 1444-2906
• DOI: 10.1007/s12562-009-0089-x

High water temperature influences the survival, growth, and maturation of fish. Genetically characterizing thermal tolerance is one of the most important subjects in fish culture. To identify the genetic characterization of thermal tolerance, this characteristic was compared among strains, and among parents and their offspring, in the guppy Poecilia reticulata. In the strain comparison, significant differences in survival rate were observed among the five strains examined, and between females and males. Females exhibited greater tolerance than males in four of five strains examined. In the comparison between parents and their offspring, stronger influence of female parent than of male parent was observed. Offspring obtained from surviving females exhibited greater tolerance than those from dead females. This tendency was typically observed in male offspring. The survival rate in male offspring obtained from dead female parents was lower than that of those from surviving females. The high-temperature tolerance of male parents did not influence this characteristic in offspring as strongly as that of female parents. These results suggest that the major gene or genes, which have a dominant resistant allele and a recessive sensitive allele, are probably passed on by sex-linked inheritance, located on the X chromosome.