Genetic and environmental influences on short-day responsiveness in Siberian hamsters (phodopus sungorus)

S. L. Goldman, Krishnan Michael Dhandapani, B. D. Goldman

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Siberian hamsters are photoperiodic rodents that typically exhibit several physiological changes when exposed to a short-day photoperiod. However, development of the winter phenotype in short days is largely conditional on prior photoperiod history: Hamsters that have been reared in an exceptionally long day length (18 L) do not usually exhibit the winter phenotype after transfer to short days, whereas animals reared under 'moderately' long days (16 L) are more variable in responsiveness to subsequent short-day exposure, with 20% to 30% generally failing to exhibit winter-type responses. Hamsters reared exclusively in an 'intermediate' day length (14 L) are almost uniformly responsive to short photoperiod. In the present study, the authors examine the influence of photoperiod history on short-day responsiveness in a breeding line of hamsters that has been subjected to artificial selection for resistance to the effects of short days. The results demonstrate that photoperiod history is an important determinant of short-day responsiveness in both random-bred (UNS) hamsters and animals artificially selected and bred for nonresponsiveness to short photoperiod (PNR). The PNR hamsters have a reduced requirement for long-day exposure to evoke a state of unresponsiveness to short days. The results are discussed in relation to possible significance for the origin of population and species differences in photoperiod responsiveness.

Original languageEnglish (US)
Pages (from-to)417-428
Number of pages12
JournalJournal of biological rhythms
Volume15
Issue number5
DOIs
StatePublished - Jan 1 2000

Fingerprint

Phodopus
Photoperiod
Cricetinae
Phenotype
Breeding
Rodentia

Keywords

  • Genetic
  • Hamster
  • Photoperiodism
  • Polymorphic

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

Cite this

Genetic and environmental influences on short-day responsiveness in Siberian hamsters (phodopus sungorus). / Goldman, S. L.; Dhandapani, Krishnan Michael; Goldman, B. D.

In: Journal of biological rhythms, Vol. 15, No. 5, 01.01.2000, p. 417-428.

Research output: Contribution to journalArticle

@article{57e7ed5cbfa044659afc24bad885e351,
title = "Genetic and environmental influences on short-day responsiveness in Siberian hamsters (phodopus sungorus)",
abstract = "Siberian hamsters are photoperiodic rodents that typically exhibit several physiological changes when exposed to a short-day photoperiod. However, development of the winter phenotype in short days is largely conditional on prior photoperiod history: Hamsters that have been reared in an exceptionally long day length (18 L) do not usually exhibit the winter phenotype after transfer to short days, whereas animals reared under 'moderately' long days (16 L) are more variable in responsiveness to subsequent short-day exposure, with 20{\%} to 30{\%} generally failing to exhibit winter-type responses. Hamsters reared exclusively in an 'intermediate' day length (14 L) are almost uniformly responsive to short photoperiod. In the present study, the authors examine the influence of photoperiod history on short-day responsiveness in a breeding line of hamsters that has been subjected to artificial selection for resistance to the effects of short days. The results demonstrate that photoperiod history is an important determinant of short-day responsiveness in both random-bred (UNS) hamsters and animals artificially selected and bred for nonresponsiveness to short photoperiod (PNR). The PNR hamsters have a reduced requirement for long-day exposure to evoke a state of unresponsiveness to short days. The results are discussed in relation to possible significance for the origin of population and species differences in photoperiod responsiveness.",
keywords = "Genetic, Hamster, Photoperiodism, Polymorphic",
author = "Goldman, {S. L.} and Dhandapani, {Krishnan Michael} and Goldman, {B. D.}",
year = "2000",
month = "1",
day = "1",
doi = "10.1177/074873000129001503",
language = "English (US)",
volume = "15",
pages = "417--428",
journal = "Journal of Biological Rhythms",
issn = "0748-7304",
publisher = "SAGE Publications Inc.",
number = "5",

}

TY - JOUR

T1 - Genetic and environmental influences on short-day responsiveness in Siberian hamsters (phodopus sungorus)

AU - Goldman, S. L.

AU - Dhandapani, Krishnan Michael

AU - Goldman, B. D.

PY - 2000/1/1

Y1 - 2000/1/1

N2 - Siberian hamsters are photoperiodic rodents that typically exhibit several physiological changes when exposed to a short-day photoperiod. However, development of the winter phenotype in short days is largely conditional on prior photoperiod history: Hamsters that have been reared in an exceptionally long day length (18 L) do not usually exhibit the winter phenotype after transfer to short days, whereas animals reared under 'moderately' long days (16 L) are more variable in responsiveness to subsequent short-day exposure, with 20% to 30% generally failing to exhibit winter-type responses. Hamsters reared exclusively in an 'intermediate' day length (14 L) are almost uniformly responsive to short photoperiod. In the present study, the authors examine the influence of photoperiod history on short-day responsiveness in a breeding line of hamsters that has been subjected to artificial selection for resistance to the effects of short days. The results demonstrate that photoperiod history is an important determinant of short-day responsiveness in both random-bred (UNS) hamsters and animals artificially selected and bred for nonresponsiveness to short photoperiod (PNR). The PNR hamsters have a reduced requirement for long-day exposure to evoke a state of unresponsiveness to short days. The results are discussed in relation to possible significance for the origin of population and species differences in photoperiod responsiveness.

AB - Siberian hamsters are photoperiodic rodents that typically exhibit several physiological changes when exposed to a short-day photoperiod. However, development of the winter phenotype in short days is largely conditional on prior photoperiod history: Hamsters that have been reared in an exceptionally long day length (18 L) do not usually exhibit the winter phenotype after transfer to short days, whereas animals reared under 'moderately' long days (16 L) are more variable in responsiveness to subsequent short-day exposure, with 20% to 30% generally failing to exhibit winter-type responses. Hamsters reared exclusively in an 'intermediate' day length (14 L) are almost uniformly responsive to short photoperiod. In the present study, the authors examine the influence of photoperiod history on short-day responsiveness in a breeding line of hamsters that has been subjected to artificial selection for resistance to the effects of short days. The results demonstrate that photoperiod history is an important determinant of short-day responsiveness in both random-bred (UNS) hamsters and animals artificially selected and bred for nonresponsiveness to short photoperiod (PNR). The PNR hamsters have a reduced requirement for long-day exposure to evoke a state of unresponsiveness to short days. The results are discussed in relation to possible significance for the origin of population and species differences in photoperiod responsiveness.

KW - Genetic

KW - Hamster

KW - Photoperiodism

KW - Polymorphic

UR - http://www.scopus.com/inward/record.url?scp=0033810249&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033810249&partnerID=8YFLogxK

U2 - 10.1177/074873000129001503

DO - 10.1177/074873000129001503

M3 - Article

VL - 15

SP - 417

EP - 428

JO - Journal of Biological Rhythms

JF - Journal of Biological Rhythms

SN - 0748-7304

IS - 5

ER -