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Barred cock and hen, illustration from Jean Bungartz, Geflügel-Album, 1885 Egg. The Plymouth Rock is an American breed of domestic chicken.It was first seen in Massachusetts in the nineteenth century and for much of the early twentieth century was the most widely kept chicken breed in the United States.
[4]: 432 His aim was to produce a dual-purpose chicken that would be suitable for meat production and would also lay large white eggs. By cross-breeding of Barred Plymouth Rock and White Leghorn birds, an autosexing breed with barred gray adult plumage was produced. As in other autosexing breeds, the sex of chicks can be distinguished at about ...
Poultry shows spread interest and understanding, with 88% of all farmers having chickens by 1910. [11] Barred Plymouth Rock hen, No. 31S. laid 237 eggs in first year at the Maine Agricultural Experiment Station (1903) As the United States urbanized, demand for eggs grew.
The Legbar is a rare British auto-sexing breed of chicken. It was created in the early twentieth century by Reginald Crundall Punnett and Michael Pease at the Genetical Institute of Cambridge University. [8]: 318 They cross-bred American barred Plymouth Rock birds with brown Leghorns and created the gold and silver colour varieties.
The physical traits used to distinguish chicken breeds are size, plumage color, comb type, skin color, number of toes, amount of feathering, egg color, and place of origin. [1] They are also roughly divided by primary use, whether for eggs, meat, or ornamental purposes, and with some considered to be dual-purpose. [1]
The Robusta Lionata is a dual-purpose breed. Hens lay 160–170 eggs per year; the eggs are salmon-coloured and weigh 55 g or more. [3] In meat production, birds reach a slaughter weight of some 1.9–2.0 kg in four months. [6] Cross-breeding Robusta Lionata cocks with Barred Plymouth Rock hens produces an auto-sexing first-generation hybrid ...
Fruitcake. Step one of a fruitcake is soaking pounds of dried fruit until it's plump and filled with bourbon. That takes up to 12 hours. Step two is simple: making and baking the loaves.
The concept of an auto-sexing breed of chicken is due to the geneticist Reginald Punnett, who during the First World War had already proposed the technique of cross-breeding chickens carrying the barred gene (B) with others to produce sex-linked chicks with plumage differences that could easily be distinguished.