Blood-spotting in eggs: Controlled by breeding in a ten-generation selection experiment with Single Comb White Leghorns
AuthorsLewis W. Taylor
I. Michael Lerner
Dorothy C. Lowry
Authors AffiliationsLewis W. Taylor is Professor of Poultry Husbandry, University of California College of Agriculture, Berkeley; I. Michael Lerner is Professor of Poultry Husbandry, University of California College of Agriculture, Berkeley; Dorothy C. Lowry is Junior Specialist, Poultry Husbandry, University of California College of Agriculture, Berkeley.
Hilgardia 5(10):3-13. DOI:10.3733/ca.v005n10p3. October 1951.
Blood-spotting in chicken eggs can be controlled by breeding. Heredity is the most important known factor responsible for the tendency of birds to produce blood-spotted eggs. To study the influence of genetic differences between birds with respect to this common defect, a selection experiment was undertaken.
Also in this issue:Marketing channels studied: Marketing of fresh carrots, celery and asparagus in California studied to determine channels
Lettuce growth rates: Investigations find heat unit accumulations not a reliable means of predicting harvest time
Invisible injury of citrus: Insecticide tests indicate that oil sprays lower soluble solids in juice and reduce dry matter in leaves
Lithium toxicity in citrus: Recognized on leaves in a grove in Santa Barbara County on the basis of artificially produced symptoms
Citricola scale control: Tests find parathion a control agent of outstanding promise in commercial navel and Valencia orange groves
Resistance to fumigation: Studies of outbreak in southern California reveal resistance to hydrogen cyanide fumigation persists
Westside dust test plots: Studies designed to develop plants and grazing systems for effective dust control under way in three counties
Research at field stations: Local agricultural problems are studied and fundamental research applied in distributed outdoor laboratories
Lemon fruit quality: Rootstocks affect juice content, soluble solids, acidity of Eurekas
Citrus-root nematodes on olive: Pest pathologically and morphologically similar to that on orange roots infests and reproduces on olive roots
Nontoxic ferns: Feeding tests with cattle find gold fern, bird's foot fern nontoxic
Swine production: Main factors of improvement are prolificacy, milk production, type
Growth and yield of certain Gramineae as influenced by reduction of photosynthetic tissue