Midian Nascimento dos Santos, Daniel Rothschild, Tina M. Widowski, Shai Barbut, E. Kiarie, I. B. Mandell, Michele T. Guerin, A. Michelle Edwards, Stephanie Torre. In pursuit of a better broiler: carcass traits and muscle myopathies in conventional and slower-growing strains of broiler chickens.. 2021. agriXiv.2021.00037
In pursuit of a better broiler: carcass traits and muscle myopathies in conventional and slower-growing strains of broiler chickens.
DOI: 10.31220/agriRxiv.2021.00037
Statement: This article is a preprint and has not been peer-reviewed. It reports new research that has yet to be evaluated and so should not be used to guide clinical practice.
-
Abstract: Abstract Selection for accelerated growth rate and high breast yield in broiler chickens have been associated with an increase in myopathies, including wooden breast (WB) and white striping (WS). To investigate effects of growth rate on carcass traits and incidence of myopathies, 14 strains were evaluated, encompassing 2 conventional (CONV; strains B and C: ADG 0-48 >60 g/d) and 12 slower-growing (SL) strains. The latter were categorized based on growth rate: FAST (strains F, G, I and M; ADG 0-62 =53-55 g/d), MOD (strains E, H, O and S; ADG 0-62 =50-51 g/d), and SLOW (strains D, J, K and N; ADG 0-62 <50 g/d). In a randomized incomplete block design, 7,216 mixed-sex birds were equally allocated into 164 pens (44 birds/pen; 30 kg/m 2 ), with each strain represented in 8-12 pens over 2-3 production cycles. From each pen, 4 males and 4 females were processed at 2 Target Weights (TW) based on their expected time to reach 2.1 kg BW (TW 1: 34 d for CONV; 48 d for SL strains) and 3.2 kg BW (TW 2: 48 d for CONV; 62 d for SL strains). Weights and yields for the carcass, breast, drumsticks, thighs and wings were obtained; breast fillets were assessed to determine the presence and severity of WB and WS. At both TWs, breast yield was higher as growth rate increased (P<0.001), with CONV having greater breast yield than other categories. Strain F had the greatest breast yield at both TWs (P<0.001) within the FAST category. At TW 2, CONV had the greatest incidence of WB and WS (P<0.001). However, within FAST, strain F had the greatest incidence of myopathies (P<0.001) at both TWs, exhibiting values as high or greater than CONV birds. The incidence of WB and WS in strains with differing growth rates but high breast meat yield suggests that the latter may play a major role in the occurrence of these myopathies.
Key words: strains; conv; lt; myopathies; 001; growth ratSubmit time: 1 January 2021
Copyright: The copyright holder for this preprint is the author/funder, who has granted agriXiv a license to display the preprint in perpetuity. -
图表
-
N.Z. Stancheva, J. Nakev, Desislava Vlahova‐Vangelova, Desislav Balev, Stefan Dragoe. Impact of Siberian larch dihydroquercetin or dry distilled rose petals as feed supplements on 8 lamb's growth performance, carcass characteristics and blood count parameters.. 2020. doi: 10.31220/agriRxiv.2020.00006
Paul Chaibva, Cecil Mugala, Veronica Makuvaro, Tavagwisa Muziri, Ignatius Chagonda, Blessing Mirika Nda. Irrigation frequency and soil type influence germination and early growth of quinoa ( Chenopodium quinoa Willd).. 2021. doi: 10.31220/agriRxiv.2021.00067
Qixia Chan, Fuqiang Wang, Yuzhe Han, Tongjun Ren, Lidong Shi, Xue Ren, Fanshuang Zeng, Mu-zi Li, Wenbo Che. Chromium picolinate supplementation improves growth and resistance ability in the sea cucumber Apostichopus japonicus .. 2021. doi: 10.31220/agriRxiv.2021.00083
Gonzalo Cantalapiedra-Hijar, I. Morel, Bernard Sepchat, Céline Chantelauze, G A Miller, Carol-Anne Duthie, I. Ortigues-Marty, R.J. Dewhurs. Identifying cattle with superior growth feed efficiency through their natural 15 N abundance and plasma urea concentration: a meta-analysis.. 2021. doi: 10.31220/agriRxiv.2021.00107
Estelle Leroux, I. Llach, Gaelle Besche, Eliel González García, D. Montier, D. Montier, Pierre Marie Bouque. Growth and behaviour of post-weaned Mérinos d'Arles ewe lambs, as measured by a Walk-over-Weighing system under Mediterranean grazing conditions.. 2021. doi: 10.31220/agriRxiv.2021.00109
Marino Villavicencio, L. Schuller, Francisco Espinosa, Carlos Noceda, Daynet Sosa, Simón Pérez-Martíne. Foliar endophytic fungi of Theobroma cacao stimulate more than inhibit Moniliophthora spp. growth and behave more as an endophytes than pathogens.. 2020. doi: 10.31220/agriRxiv.2020.00019
Todd S. Rosenstock, M. Mayzelle, Nictor Namoi, Peter Fantk. Climate impacts of natural farming: A cradle to gate comparison between conventional practice and Andhra Pradesh Community Natural Farming.. 2020. doi: 10.31220/agriRxiv.2020.00013
Addisu Getahu. Estimating genetic variability, gene effect, heritability, and genetic advance of yield component agronomic traits: towards the improvement of peanut agronomic traits.. 2021. doi: 10.31220/agriRxiv.2021.00058
Ehsanul Haque, Most Shanaj Parvi. Phytotoxicity of fungicide coated sugar beet seed depends on growth condition.. 2021. doi: 10.31220/agriRxiv.2022.00115
Habte Jifar, Zerihun Tadele, Kassahun Tesfaye, Kebebew Assefa, Kifle Dagne, Alemayehu Teressa Negawo, Michael Blümmel, Chris S. Jone. Exploring the potential to capture variation in grain-straw yield and straw quality traits of tef [Eragrostis tef (Zucc.) Trotter] varieties.. 2021. doi: 10.31220/agriRxiv.2021.00078
-
ID Submit time Number Download 1 2021-01-01 10.31220/agriRxiv.2021.00037V1
Download -
-
Public Anonymous To author only
Get Citation
Article Metrics
- Read: 52
- Download: 0
- Comment: 0
