Effect of heat and nutritional stress on growth and testicular HSP70 expression in goats

P.a Abdul Niyas P.A Abdul Niyas,Girish Varma Girish Varma,V Sejian V Sejian,R Bhatta R Bhatta,E.k Kurien E.K Kurien,M Bagath M Bagath,S Parthipan S Parthipan,Sellappan Selvaraju Sellappan Selvaraju,G B Manjunathareddy G B Manjunathareddy

doi:10.54386/jam.v19i3.619

Abstract

A study was conducted to assess the combined effects of heat and nutritional stress on body weight changes and HSP70 gene expressionin Osmanabadi goats. Twenty four adult Osmanabadi bucks were divided into four groups of six animals each viz. C (control), HS (heat stress), NS (nutritional stress) and CS (combined stress). The C and HS bucks had ad libitum access to their feed while NS and CS bucks were subjected to restricted feed (30% intake of C bucks) to induce nutritional stress. The HS and CS bucks were exposed to heat stress in outside environment for six hours a day between 10:00 h to 16:00 h. Both C and HS groups showed significantly higher (P<0.01) body weight and body condition scoring as compared to NS and CS groups. The highest plasma growth hormone (P<0.01) was recorded in CS group and the lowest in all stress groups (C, HS and NS). The higher (P<0.05) expression of testicular Heat Shock Protein 70 (HSP70) mRNA was reported in HS groups. It can be concluded from this study that when nutrition is not compromised Osmanabadi goats were able to withstand heat stress without compromising production.

Highlights

In developing nations livestock plays a major role in the agricultural sector and it has a crucial role in deciding the economy of the nation
The temperature humidity index (THI) values were calculated as per method described by McDowell (1972).The study was conducted for a period of 45 days
The results revealed that testicular Heat Shock Protein 70 (HSP70) mRNA expression was evident in C (1 fold), HS (1.95 fold), NS (1.51 fold) and CS (1.02 fold)

Summary

Introduction

In developing nations livestock plays a major role in the agricultural sector and it has a crucial role in deciding the economy of the nation. Both the quantity and the quality of the available pastures are affected during extreme environmental conditions (Sejian et al, 2010a). When exposed to one stress at a time, animals can effectively counter it based on their stored body reserves and without altering the productive functions If they are exposed to more than one stress at a time, the Effect of heat and nutritional stress on growth in goats. Such a response is attributed to animal’s inability to cope with the combined effects of different stressors simultaneously In such a case, the animal’s body reserves are not sufficient to effectively counter multiple environmental stressors. The present study was conducted to evaluate the influence of two environmental factors, heat and nutritional stress simultaneously on the growth and HSP70 gene expression in Osmanabadi goats

Methods

Results

Conclusion