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Breeders, Layers and Hatching Egg Production R. Keith Bramwell, PhD Department of Poultry Science University of Arkansas.

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Presentation on theme: "Breeders, Layers and Hatching Egg Production R. Keith Bramwell, PhD Department of Poultry Science University of Arkansas."— Presentation transcript:

1 Breeders, Layers and Hatching Egg Production R. Keith Bramwell, PhD Department of Poultry Science University of Arkansas

2 Terms Cock: Male chicken Hen: Female Pullett: Female under six months, non laying Capon: Neutered male chicken Broiler: Raised for meat Layer: Egg production Gestation: Chicken: 21 days Production: usually 1 egg per day Comb: Red tissue on top of head Wattle: Red tissue hanging under beak Brooding: the raising of baby chicks

3 Chickens – layers or broilers: Broilers – young meat chickens (8 weeks old or less). Roasters – mature chickens used for meat. Capons – castrated males weeks old. There are more than 200 breeds of chickens in the US. Most layers and broilers are cross-breeds.

4 Breeds and Varieties

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6 Breed is a type of chicken –Leghorn or a Plymouth Rock Variety is defined by the variations within the breed –Leghorn – single comb vs rose comb – white vs light brown –Plymouth rock – White Rock vs Barred Rock

7 Body shape and structure –Modern game, Japanese, rumpless Types of Variations

8 Leg and feet variations –Silkie, Salmon Favorelle, etc Size –Bantam, standard Sound? –Long crowers! Types of Variations

9 What is Bantam Chicken? A small version of the larger (standard size) breed Bantams are almost exclusively for exhibition

10 Types of Variations Feather color –Solid coloring –Barring, penciled, mottled

11 Feather type –Silkies, frizzles, long tails Types of Variations

12 Feather distribution –Polish, cochins, naked neck Types of Variations

13 Comb type –Single, rose, pea, v-shape, etc Types of Variations

14 Comb Types Single CombRose Comb Blue-hen, Leghorn, Plymouth Rock, New Hampshire, Rhode Island Red Leghorn, Rhode Island Red

15 Comb Types

16 V Comb Polish

17 Comb Types Pea Comb Ameraucana, Araucana, Cornish

18 Fertilization & Embryo Development Fertilization occurs within 5 minutes after ovulation Shell formation takes hours to complete Hen’s body temperature o F Laid egg represents 1 days embryonic growth (20, ,000 cells)

19 Day 0 of Incubation: Before Egg is Laid Fertile/infertile determination can be made at lay While the egg moves from initial fertilization, to shell membrane formation to shell formation in the oviduct, the embryo develops from the early to late cleavage stages Germinal disc diameter (3-4mm) larger the first few hours after fertilization than at lay

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21 Fertile and Infertile Eggs Infertile eggFertile egg


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