Genetic variations alter physiological responses following heat stress in 2 strains of laying hens

Felver-Gant, J.N.; Mack, Laurie A.; Dennis, R. L.; Eicher, S.D.; Cheng, Hsiaopo

doi:10.3382/ps.2011-01988

Cited by 94 publications

(59 citation statements)

References 45 publications

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“…Overall, the studies show immunosuppressive effect of heat stress on broilers and laying hens e.g., reduced relative weights of thymus and spleen has been reported in laying hens and broilers subjected to heat stress (Bartlett and Smith, 2003;Quinteiro-Filho et al, 2010;Ghazi et al, 2012). Lower liver weights in laying hens (Felver-Gant et al, 2012) and lower levels of total circulating antibodies including specific IgM and IgG levels, both during primary and secondary humoral responses in broilers in response to heat stress is reported (Bartlett and Smith, 2003). Aengwanich (2008) reported reduced bursa weight along with decreased lymphocytes numbers in cortex and medulla of bursa in broilers subjected to heat stress.…”

Section: Effect Of Heat Stress On Immune Responsementioning

confidence: 99%

“…The previous studied have revealed that genetic variations forms much of the basis for birds response to heat stress; however, knowledge in this area is limited and it needs further studies to explore its full potential (Felver-Gant et al, 2012;Lara and Rostagno, 2013). Genetic marker assisted selective breeding using the genes related to thermos-tolerance and disease resistance in poultry is the need of the hour for further enhancement in the poultry productivity.…”

Section: Genetic Strategiesmentioning

confidence: 99%

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Assessing and Mitigating the Impact of Heat Stress in Poultry

Pawar¹,

Sajjanar²,

Lonkar³

et al. 2016

Adv. Anim. Vet. Sci.

105

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| Over the years, development of poultry genotypes is driven mainly aiming higher production at optimal temperatures. However, recent increase in extreme heat wave events and enhanced sensitivity of modern poultry genotypes to heat stress has become a major concern leading to significant economic losses to the poultry industry. In India, per capita consumption of poultry meat and eggs is significantly lower than the minimum recommended by Indian Council of the Medical Research and there is need for significant increase in poultry productivity to fulfil these requirements. Conversely, in sub-tropical countries like India where summer is severe, accomplishing higher production under current scenario is a challenge. Earlier intervention strategies including environmental management and nutritional supplementation have been inconsistent in poultry for managing heat stress. Therefore, there is scope for exploring innovative approaches, including genetic marker-assisted selection of poultry breeds for increased heat tolerance and application of molecular techniques in poultry breeding to improve poultry productivity in a sustainable manner. Hence, keeping in view the present situation, it is essential to understand various cellular and molecular mechanisms involved in poultry production including physiological and immunological aspects of the poultry birds under heat stress using molecular biology tools that can help in development of poultry breeds which are better adapted to changing climate.

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Section: Effect Of Heat Stress On Immune Responsementioning

confidence: 99%

Section: Genetic Strategiesmentioning

confidence: 99%

Assessing and Mitigating the Impact of Heat Stress in Poultry

Pawar¹,

Sajjanar²,

Lonkar³

et al. 2016

Adv. Anim. Vet. Sci.

105

View full text Add to dashboard Cite

show abstract

“…Other examples of undesired effects in response to selection have been described for different species (pigs: Knap and Rauw, 2009;Dourmad et al, 2010;poultry: Siegel et al, 2010;Felver-Gant, 2012;rabbits: Vicente et al, 2012;Lavara et al, 2012), leading to the general perception that selection is degrading the ability of animals to simultaneously sustain production, reproduction and health (Rauw et al, 1998;. Nevertheless, artificial selection of high producing animals does not necessarily entail the emergence of negative effects (dairy cows: Begley et al, 2009;rabbits: Theilgaard et al, 2007;, and breeds and strains capable of sustaining production, fertility and health over different environments (i.e.…”

Section: Acknowledgementsmentioning

confidence: 99%

Environmental and genetic factors driving robustness in reproductive rabbit does.

Savietto¹

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“…으로 보고되고 있다 (Cahaner et al, 2008;Star et al, 2008aStar et al, , 2008bFelver-Gant et al, 2012;Sohn et al, , 2015Cho et al, 2016). 개체에 스트레스가 가해졌을 때 체내 항상성 유 지를 위해 생체는 즉각적으로 생리적 반응을 한다.…”

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“…또한 고온 스트레스는 암컷에 있어서 시상하부 및 난소에서 정상적인 생식기능을 하게 하는 호르몬 생성을 방해하여 산 란능력의 저하를 초래하게 한다 (Muiruri and Harrison, 1991;Novero et al, 1991;Rozenboim et al, 2007;Elnagar et al, 2010;Felver-Gant et al, 2012 (Cho et al, 2016). 이와 같은 결과는 실용브로일러와 같은 육종 개 량된 고성장 개체가 토종닭이나 야계와 같은 경량종에 비해 서 HSP-70의 발현율이 높았다는 보고와도 유사한 결과이다 (Yahav et al, 1998;Sandercock et al, 2006;Cahaner et al, 2008;Soleimani et al, 2011;Tamzil et al, 2013).…”

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The Relationship of the Expressions of Stress-related Markers and Their Production Performances in Korean Domestic Chicken Breed

Park¹,

Cho²,

Choi³

et al. 2016

Korean Journal of Poultry Science

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This study was conducted to verify the relationships between the expression values of stress-related markers and their production performances in 25 strains of Korean domestic chicken breeds. For stress response markers, the amount of telomeric DNA; expression levels of heat shock protein (HSP)-70, HSP-90α, and HSP-90β; and comet scores were analyzed. Production performances were measured by the survival rate, body weights, days at first egg laying, egg weight and hen housed egg production. The results showed that the production traits and values of stress-related markers showed significant differences between strains. In general, the stress response of pure bred chickens with heavy weights was relatively high, while that of hybrid chickens with light weights was relatively low. The correlation coefficients between telomere contents and body weights showed that there were weak negative relationships. However, the correlations of telomere content with the survival rate and egg production were weakly positive after 20 weeks old. The expression levels of HSP genes and DNA damage rate (comet scores) were positively correlated to body weight, but were negatively correlated to the survival rate and egg production. The results implied that increasing body weight was associated with increasing HSPs expression and the DNA damage rate was associated with decreasing telomere content. In addition, increasing HSPs expression and the DNA damage rate decreased the survival rate and egg production, but the relationships with the telomere content was the reverse. Correlations among the stress-related markers showed that there were significant correlation coefficients between all of the marker values. HSPs expression was negatively correlated to the telomere content, while it was positively correlated to the DNA damage rate. There was a highly negative correlation between the telomere content and DNA damage rate. In conclusion, increasing the HSP values and DNA damage rate can promote telomere reduction, which led to a decrease in disease resistance and robustness of the chicken. Thus, increasing the stress response was verified to adversely affect the laying performance and viability of chickens.

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Genetic variations alter physiological responses following heat stress in 2 strains of laying hens

Cited by 94 publications

References 45 publications

Assessing and Mitigating the Impact of Heat Stress in Poultry

Assessing and Mitigating the Impact of Heat Stress in Poultry

Environmental and genetic factors driving robustness in reproductive rabbit does.

The Relationship of the Expressions of Stress-related Markers and Their Production Performances in Korean Domestic Chicken Breed

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