Impact of maternal heat stress at insemination on the subsequent reproductive performance of Holstein, Brown Swiss, and their crosses

The ability of ruminants to regulate body temperature depends on the genotype. Dairy breeds are generally more sensitive to heat stress than beef breeds. Higher-producing animals are more susceptible to heat stress because they generate more metabolic heat. The objective of evaluating reproductive performance as a response of adaptability to the management and climatic conditions of the Humid Tropics. 78 animals were used (40 Brown Swiss, from Puno and 38 Mestizas from local origin) raised in humid tropic conditions. Parametric statistics are presented as analysis of measures of central tendency and dispersion, non-parametric statistics by frequency analysis, the χ2 test of independence was used to detect differences, α = 0.05. The categorized and continuous dependent variables were evaluated with Student's t test using SPSS Software v.23. The mean age at first estrus in Brown Swiss was 12.43 months, in mestizo cattle 18.68 months (P <0.05). Average age of first calving in Brown Swiss of 25.25 months versus mestizo cattle 28.34 months (P <0.05). Interval from calving to the first service in Brown Swiss was 99.29 days. Open days observed in Brown Swiss was 107.29 days. The pregnancy rate at the first service in Brown Swiss was 70.0% pregnancy at the first service and 30.0% at the second service, for the mestizo genotype it was 68.4% at the first service, 28.9 at the second and 2.6 at the third service (P> 0.05; X2 = 0.50; p = 0.47). It is concluded that bovine animals of the Brown Swiss genotype have a good reproductive performance in the Humid Tropic climate compared to the Mestizo genotype

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Heat Stress Elicits Different Responses in Peripheral Blood Mononuclear Cells from Brown Swiss and Holstein Cows

Journal of Dairy Science ◽

10.3168/jds.s0022-0302(06)72510-3 ◽

2006 ◽

Vol 89 (12) ◽

pp. 4606-4612 ◽

Cited By ~ 111

Author(s):

N. Lacetera ◽

U. Bernabucci ◽

D. Scalia ◽

L. Basiricò ◽

P. Morera ◽

...

Keyword(s):

Heat Stress ◽

Peripheral Blood Mononuclear Cells ◽

Peripheral Blood ◽

Mononuclear Cells ◽

Holstein Cows ◽

Peripheral Blood Mononuclear ◽

Brown Swiss ◽

Blood Mononuclear Cells

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Effects of non-lactating period length on the subsequent calving ease and reproductive performance of Holstein, Brown Swiss and the crosses

Animal Reproduction Science ◽

10.1016/j.anireprosci.2015.04.008 ◽

2015 ◽

Vol 158 ◽

pp. 60-67 ◽

Cited By ~ 14

Author(s):

Mahmoud S. El-Tarabany

Keyword(s):

Reproductive Performance ◽

Period Length ◽

Brown Swiss ◽

Calving Ease

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Reproductive performance of backcross Holstein × Brown Swiss and their Holstein contemporaries under subtropical environmental conditions

Theriogenology ◽

10.1016/j.theriogenology.2014.10.010 ◽

2015 ◽

Vol 83 (3) ◽

pp. 444-448 ◽

Cited By ~ 22

Author(s):

Mahmoud S. El-Tarabany ◽

Khairy M. El-Bayoumi

Keyword(s):

Reproductive Performance ◽

Environmental Conditions ◽

Brown Swiss

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Adaptive Mechanisms of Goat to Heat Stress

10.5772/intechopen.96874 ◽

2021 ◽

Author(s):

Bhabesh Mili ◽

Tukheswar Chutia

Keyword(s):

Heat Stress ◽

Reproductive Performance ◽

Harsh Environment ◽

Hilly Terrain ◽

Rural People ◽

Transgenic Goat ◽

Adaptive Mechanisms ◽

Wide Range ◽

Gene Level ◽

Heat Stressor

Goat is popularly known as ‘poor man’s cow’, rears mostly by the rural people due to better adaptive capability to harsh environment. Heat stress either hot or cold; negatively influence the goat productive and reproductive performance. Both survivability and reproductive performance of goat most often depend on its ability to cope with heat stressor. Goats can rears in a wide range of environment and geography may it be hilly terrain or undulating topography due to cope with the heat stress via combination of behavioral, morphological, physiological, biochemical, metabolic, hormonal and molecular changes at the gene level. All these adaptive mechanisms and genes are important for the assessment of heat stress, adaptability and strategies for management, production of heat-tolerant transgenic goat using advance biotechnological tools for sustainable goat production in challenged environment due to climate change.

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Ovarian Development and Vitellogenin Gene Expression under Heat Stress in Silkworm,Bombyx mori

Psyche A Journal of Entomology ◽

10.1155/2016/4242317 ◽

2016 ◽

Vol 2016 ◽

pp. 1-8

Author(s):

Satinath Paul ◽

Bela Keshan

Keyword(s):

Gene Expression ◽

Heat Stress ◽

Heat Shock ◽

Reproductive Performance ◽

Ovarian Development ◽

Fat Body ◽

Shock Treatment ◽

Heat Shock Treatment ◽

Vitellogenin Gene ◽

Vitellogenin Mrna

The present study observed the effect of heat stress on ovarian development, fecundity, and vitellogenin gene expression in silkworm,Bombyx mori. The result showed that the heat shock treatment to spinning larvae and pupae at 39°C (1 h and 2 h) did not cause any adverse effect on the reproductive performance ofB. mori.However, the heat shock treatment at 42°C or above caused a decrease in the fecundity. The heat shock treatment to day 2 pupae for 2 h at 45°C caused a drastic effect on the development of ovary as measured by gonadosomatic index. The study thus showed that a brief exposure ofBombyxlarvae and pupae to a temperature of 42°C or higher, much prevalent in tropical countries like India, greatly affects the ovarian development and reproductive performance of this commercially important insect. The study further showed a developmental- and tissue-specific expression of vitellogenin mRNA in fat body and ovary upon heat shock. When heat shock treatment was done at 39°C and 42°C to spinning larvae, ovary showed an upregulation in the expression of vitellogenin mRNA, whereas fat body failed to do so. However, at 45°C, both fat body and ovary showed a downregulation. The heat shock treatment to day 2 pupae showed an upregulation in the vitellogenin mRNA expression in both fat body and ovary, even at 45°C. The upregulation in the expression of vitellogenin upon heat shock indicates its role in thermal protection ofBombyxlarvae and pupae.

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