D.O. NOBLE
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View article: Influence of selection for increased body weight, egg production, and shank width on the length of the incubation period of turkeys
Influence of selection for increased body weight, egg production, and shank width on the length of the incubation period of turkeys Open
An experiment was designed to study the influence of selection for increased 16-wk BW (F line), egg production (E line), and shank width (FL line) in turkeys on length of the incubation period and to estimate the influence of adult BW (BW5…
View article: Factors influencing early poult flip-overs in experimental populations of turkeys
Factors influencing early poult flip-overs in experimental populations of turkeys Open
A large number of poults from a line (E) selected long-term for increased egg production were observed, in recent generations, to flip over during the week immediately after hatching. This condition, termed early poult flip-overs (EPF), is…
View article: Influence of crossing a line selected for increased shank width and a commercial sire line on performance and walking ability of turkeys
Influence of crossing a line selected for increased shank width and a commercial sire line on performance and walking ability of turkeys Open
The present study was initiated to determine whether walking ability (WA) could be markedly improved without seriously compromising growth rate and body conformation by crossing a relatively unimproved commercial sire line (UC) with a line…
View article: Beak trimming of turkeys. 2. Effects of arc beak trimming on weight gain, feed intake, feed wastage, and feed conversion
Beak trimming of turkeys. 2. Effects of arc beak trimming on weight gain, feed intake, feed wastage, and feed conversion Open
An experiment was conducted to study the effects of arc beak trimming on feed consumption, weight gain, and feed wastage in males and females from two large-bodied strains and one medium-bodied strain of turkeys. Birds were placed in wire-…
View article: Divergent selection for body weight and yolk precursor in Coturnix coturnix japonica. 12. Heterosis in reciprocal crosses between divergently selected lines
Divergent selection for body weight and yolk precursor in Coturnix coturnix japonica. 12. Heterosis in reciprocal crosses between divergently selected lines Open
A selection experiment was started using Japanese quail to study the genetics of BW and plasma yolk precursor (measured by total plasma phosphorus; TPP). Lines were divergently selected for 4-wk BW (HW and LW) or plasma TPP (HP and LP). Su…
View article: Genetics of growth and reproduction in the turkey. 13. Effects of repeated backcrossing of an egg line to two sire lines
Genetics of growth and reproduction in the turkey. 13. Effects of repeated backcrossing of an egg line to two sire lines Open
The objective of the present study was to determine the feasibility of rapidly increasing the BW of dam lines by repeated backcrossing of a dam line to a sire line. A line (E) selected long-term for increased egg production was backcrossed…
View article: The Effect of Beak Trimming on Two Strains of Commercial Tom Turkeys.
The Effect of Beak Trimming on Two Strains of Commercial Tom Turkeys. Open
The influence of beak trimming of two strains of commercial male turkeys (Strains A and B) on behavior during the growing period was investigated. Poults were either left with beaks intact or arc beak trimmed at hatching. Strain by beak tr…
View article: Influence of Growth Selection in Turkeys on Resistance to Pasteurella multocida
Influence of Growth Selection in Turkeys on Resistance to Pasteurella multocida Open
Four lines of turkeys, a randombred control (RBC2) started in 1966 and three sire lines (F, A, and B), were challenged with a field isolate of Pasteurella multocida (capsular serogroup A, somatic serotype 3, 4) at 6 wk of age. Line F, a su…
View article: Direct and Correlated Responses to Long-Term Selection for Increased Body Weight and Egg Production in Turkeys
Direct and Correlated Responses to Long-Term Selection for Increased Body Weight and Egg Production in Turkeys Open
Lines of turkeys were selected long-term for increased egg production (E line; 34 generations) or increased 16-wk BW (F line; 28 generations). The E and F lines were started from randombred control populations (RBC1 and RBC2, respectively)…
View article: The Effect of Altering Feed and Water Location and of Activity on Growth, Performance, Behavior, and Walking Ability of Hens From Two Strains of Commercial Turkeys
The Effect of Altering Feed and Water Location and of Activity on Growth, Performance, Behavior, and Walking Ability of Hens From Two Strains of Commercial Turkeys Open
An experiment was designed to determine the influence of changing feed and water location and of increased activity on growth, performance, and behavior of turkey hens from commercial strains. The three treatment regimens consisted of loca…
View article: Beak Trimming of Turkeys. 1. Effects of Three Methods of Beak Trimming on Body Weight and Mortality of Six Genetic Lines
Beak Trimming of Turkeys. 1. Effects of Three Methods of Beak Trimming on Body Weight and Mortality of Six Genetic Lines Open
An experiment was designed to compare BW and mortality of turkeys when three methods of beak trimming were utilized. Turkeys from six genetic lines were assigned to three beak trimming methods: arc beak trimming at hatching, hot-blade bloc…
View article: Divergent Selection for Body Weight and Yolk Precursor in Coturnix coturnix japonica.
Divergent Selection for Body Weight and Yolk Precursor in Coturnix coturnix japonica. Open
Japanese quail lines were divergently selected for 4-wk BW (HW and LW lines) and plasma yolk precursor [total plasma phosphorus (TPP); HP and LP lines] for 30 generations. The base population was a randombred control line (R1) that was mai…
View article: Divergent Selection for Body Weight and Yolk Precursor in Coturnix coturnix japonica.
Divergent Selection for Body Weight and Yolk Precursor in Coturnix coturnix japonica. Open
Japanese quail lines were divergently selected for 30 generations for 4-wk BW (HW, LW) or plasma yolk precursor (HP, LP) as measured by total plasma phosphorus (TPP) at the beginning of lay. The HW, LW, HP, and LP lines were initiated from…
View article: Range and Confinement Rearing of Four Genetic Lines of Turkeys.
Range and Confinement Rearing of Four Genetic Lines of Turkeys. Open
An experiment was conducted to determine the effect of range and confinement rearing on behavior and tonic immobility of four genetic lines of turkeys. Lines of turkeys utilized were selected for increased body weight, or increased shank d…
View article: Range and Confinement Rearing of Four Genetic Lines of Turkeys. 1. Effects on Growth, Mortality, and Walking Ability
Range and Confinement Rearing of Four Genetic Lines of Turkeys. 1. Effects on Growth, Mortality, and Walking Ability Open
Line by environment interactions complicate interpretation of results from long-term selection experiments. To investigate the potential effects of such interactions, a study was conducted in which birds from four genetic lines were reared…
View article: The Influence of Major Histocompatibility Complex Genotypes on Resistance to Pasteurella multocida and Newcastle Disease Virus in Turkeys
The Influence of Major Histocompatibility Complex Genotypes on Resistance to Pasteurella multocida and Newcastle Disease Virus in Turkeys Open
Sublines homozygous for each of four MHC haplotypes were developed from randombred control populations of turkeys and challenged with Pasteurella multocida (capsular serogroup a, somatic serotype 3, 4) at 6 wk of age or Newcastle disease v…
View article: The Stability of Three Randombred Control Lines of Turkeys
The Stability of Three Randombred Control Lines of Turkeys Open
A survey of growth and reproduction traits over eight and seven generations, respectively, is presented for three randombred control (RBC) lines of turkeys. Of the 26 traits measured, regression coefficients for the three RBC lines differe…
View article: Influence of Selection for Increased Egg Production, Body Weight, and Shank Width of Turkeys on Egg Composition and the Relationship of the Egg Traits to Hatchability
Influence of Selection for Increased Egg Production, Body Weight, and Shank Width of Turkeys on Egg Composition and the Relationship of the Egg Traits to Hatchability Open
Egg traits, mature BW, fertility, and hatch of fertile eggs were measured in lines of turkeys selected for increased egg production, increased 16-wk BW, and increased shank width and in corresponding randombred controls to determine the ef…
View article: The Effect of Beak Trimming on Two Strains of Commercial Tom Turkeys
The Effect of Beak Trimming on Two Strains of Commercial Tom Turkeys Open
Two commercial strains (Strains A and B) of tom turkeys were either beak trimmed or left with intact beaks. These strains responded similarly to beak trimming for performance traits, with the exception of a higher incidence of beak-inflict…
View article: Research Note: A Comparison of the Influence of Nesting Materials on Breakage and Shell Cleanliness of Eggs from Large- and Small-Bodied Lines of Turkeys
Research Note: A Comparison of the Influence of Nesting Materials on Breakage and Shell Cleanliness of Eggs from Large- and Small-Bodied Lines of Turkeys Open
A 3-yr experiment was conducted to study the effect of nesting materials on cleanliness and breakage of eggs produced by large and small lines of turkeys. Eggshell cleanliness was evaluated using a subjective scoring system with lower valu…