Genotype by Environment Interactions Using Fast-Growing, Lean or Fat Broiler Chickens, Originating from The Netherlands and Israel, Raised at Normal or Low Temperature

Leenstra, F.R.; Cahaner, A.

doi:10.3382/ps.0702028

Cited by 28 publications

(17 citation statements)

References 8 publications

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“…Chickens, diets, housing, and measurements have been described by Leenstra and Cahaner (1991). They reported on the comparisons between normal and suboptimal temperature.…”

Section: Methodsmentioning

confidence: 99%

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Effects of High Temperature on Growth and Efficiency of Male and Female Broilers from Lines Selected for High Weight Gain, Favorable Feed Conversion, and High or Low Fat Content

Cahaner¹,

Leenstra²

1992

Poultry Science

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141

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Male and female broiler chicks from five different broiler crosses (WI, LF, and HF = Israeli chicks selected for high body weight gain, and low and high abdominal fat, respectively; FC and WN = Dutch chicks selected for favorable feed conversion and high body weight gain, respectively) were raised at a high ambient temperature (32 to 33 C). Weight gain, protein and fat content in the carcass and feed, and protein efficiency were determined at 4, 6, and 8 wk of age. The effect of the high temperature was evaluated by comparing these data with those of similar chicks raised at a normal temperature (20 to 33 C) up to 6 wk of age. The reductions in body weight, protein gain, and feed and protein efficiency due to the high temperature increased with age and were much larger in males than in females. This trend was more pronounced in WI and WN chicks than in LF, HF, and FC chicks. Females of WI and WN crosses were as heavy as males at 6 wk and heavier at 8 wk. In LF, HF, and FC crosses, both sexes had similar weights at 8 wk. Growth reduction due to the high temperature was largest in the groups with the highest growth rate at the normal temperature (WI and WN males). Chicks with a lower growth rate and a higher capacity for energy storage in fat depots (all females, HF chicks), or a higher capacity for heat loss (FC chicks), were less affected by the high temperature. The results suggest that females should be preferred over males for broiler production in hot facilities or locations. Broiler genotypes selected for feed efficiency at the expense of fast growth may allow for a more profitable broiler production in high-temperature regions.

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“…Chickens, diets, housing, and measurements have been described by Leenstra and Cahaner (1991). They reported on the comparisons between normal and suboptimal temperature.…”

Section: Methodsmentioning

confidence: 99%

“…In three other rooms, normal temperatures, i.e., gradually decreasing from 33 C at hatch to 20 C at 6 wk of age (Leenstra and Cahaner, 1991), were applied. Relative humidity was kept at 60% for both temperature schemes.…”

Section: Climatementioning

confidence: 99%

Effects of High Temperature on Growth and Efficiency of Male and Female Broilers from Lines Selected for High Weight Gain, Favorable Feed Conversion, and High or Low Fat Content

Cahaner¹,

Leenstra²

1992

Poultry Science

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141

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“…Outbred broilers of the R line and the FC line from ID-Lelystad (formerly COVP-Het Spelderholt) (Leenstra & Cahaner, 1991) and from one commercial line (Ross), purchased from the Spelderholt Institute for Poultry Reseach, The Netherlands (called the C line), were used. The R and FC lines are experimental lines developed from common ancestors, with the R line selected solely on the basis of growth rate and the FC line solely on feed conversion efficiency.…”

Section: Methodsmentioning

confidence: 99%

Resistance of broiler outbred lines to infection with Salmonella enteritidis

Bolder¹,

Janss²,

Putirulan³

et al. 2002

Avian Pathology

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Salmonella infections originating from poultry are one of the major causes of food-borne disease. For the control of salmonella in poultry a multifactorial approach is more likely to be effective, and the genetic resistance of poultry breeds to salmonella infections may be a valuable contribution. Experimental Salmonella enteritidis infections were examined in three different broiler outbred lines: the FC line, which had been selected for feed conversion efficiency; the R line, which had been selected for growth rate; and the C line, a commercially available line. The FC line had the highest mortality rate after intramuscular inoculation with 5 3 10 6 colony forming units (CFU) of S. enteritidis at 2 weeks of age (40% versus 21 and 20% in the other lines). However, at slaughter age, the number of birds carrying salmonella in caecal contents, and the concentration of salmonella in the caecal contents, was lowest in the FC line. The FC and R lines were compared by inoculation with doses ranging from 10 2 to 10 7 CFU S. enteritidis. At sublethal doses (10 5 CFU or less), the FC line carried significantly less salmonella in caecal contents and the rate of systemic infection was lower. The start of shedding was also delayed compared with the R line. At doses of 10 6 CFU S. enteritidis or higher, there were no differences in salmonella carriage between the lines, and the FC line showed higher mortality. In conclusion, resistance to mortality and resistance to the carriage of S. enteritidis do not necessarily coincide within lines, as the FC line showed high mortality but low carriage, both in survivors of high infection doses and in all birds at lower infection doses.

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“…No significant interaction of temperature and diet was observed, therefore, only the main effects for temperatures and dietary treatments are presented. Austic (1985), Leenstra and Cahaner (1991) and Borges at al. (2004) reported that broilers kept in high ambient temperature produce less absolute carcass weight, and this decrease is particularly evident in breast meat (Howlider and Rose, 1989).…”

Section: Resultsmentioning

confidence: 97%

Possible Effects of Delivering Methionine to Broilers in Drinking Water at Constant Low and High Environmental Temperatures

Çadirci

Koncagül

2014

Italian Journal of Animal Science

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An experiment was conducted to study the effects of water-soluble DL-methionine supplied through water and feed on the performance and carcass yield of broilers housed at two constant temperatures from 21 to 42 days of age. Birds were housed in two rooms (240 birds per room) with temperatures set at 21±2 and 30±2 o C, respectively. Birds were divided into five groups of equal number within each room and fed five different diets (G1-G5). A low-methionine basal diet without supplemental methionine was fed to group 1 (G1). The basal diet was fortified with 0.025% or 0.050% methionine, either in feed (G2 and G3, respectively), or in a water solution (G4 and G5, respectively). Mortality was not significantly altered by any dietary treatment. Neither feed nor water intake was affected adversely by DLmethionine inclusion in drinking water. Housing at high temperature showed deleterious effect on birds' weight gain. Additional methionine intake both in feed and water was associated with significantly heavier body weight, weight gain and feed conversion ratio, than the basal diet at low and high environmental temperature. Carcass yields, as a percentage of live body weight, were not affected by dietary treatment. The results indicate that, under the experimental conditions, DLmethionine provided in drinking water can be effectively assimilated by broilers, at least from 21 to 42 days of age.

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Genotype by Environment Interactions Using Fast-Growing, Lean or Fat Broiler Chickens, Originating from The Netherlands and Israel, Raised at Normal or Low Temperature

Cited by 28 publications

References 8 publications

Effects of High Temperature on Growth and Efficiency of Male and Female Broilers from Lines Selected for High Weight Gain, Favorable Feed Conversion, and High or Low Fat Content

Effects of High Temperature on Growth and Efficiency of Male and Female Broilers from Lines Selected for High Weight Gain, Favorable Feed Conversion, and High or Low Fat Content

Resistance of broiler outbred lines to infection with Salmonella enteritidis

Possible Effects of Delivering Methionine to Broilers in Drinking Water at Constant Low and High Environmental Temperatures

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