scholarly journals Genetic engineering of yellow betalain pigments beyond the species barrier

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Takashi Nakatsuka ◽  
Eri Yamada ◽  
Hideyuki Takahashi ◽  
Tomohiro Imamura ◽  
Mariko Suzuki ◽  
...  
Keyword(s):  
Genetic Engineering ◽  
Species Barrier

GENETIC ENGINEERING TO IMPROVE RESISTANCE TO VIRAL DISEASES OF POULTRY: A MODEL FOR APPLICATION TO LIVESTOCK IMPROVEMENT

1985 ◽  
Vol 65 (3) ◽  
pp. 553-562 ◽  
Author(s):  
L. B. CRITTENDEN ◽  
D. W. SALTER
Keyword(s):  
Genetic Engineering ◽  
Germ Line ◽  
Dominant Gene ◽  
Productive Efficiency ◽  
Viral Diseases ◽  
Envelope Gene ◽  
Endogenous Virus ◽  
Species Barrier ◽  
Lymphoid Leukosis ◽  
Line Insertion

Several genetic engineering approaches can and will be used to control viral diseases in chickens. One approach is to insert genes for resistance in the germ line of the chicken. The endogenous avian leukosis virus (ALV) genes that segregate in the chicken serve as a natural model for germ line insertion and expression. One gene controls the expression of endogenous ALV envelope antigen. Chickens carrying that gene are resistant to infection with endogenous ALV. We propose, as a model, to insert the envelope gene of exogenous ALV, thus inserting a dominant gene for resistance to exogenous ALV. Our approach to germ line insertion in the chicken, including insertion methods, vectors and testing, is discussed. Genetic engineering approaches to animal breeding will only be useful as methods to enhance the efficacy of present breeding methods. Gene insertion can add new genetic variation by crossing the species barrier, and by introducing genes into highly productive lines one at a time. Molecular methods may also be useful for the introduction of chromosomal markers and to help identify major genes influencing phenotypes controlling productive efficiency. Key words: Germ line, vectors, retrovirus, chicken, endogenous virus, lymphoid leukosis

Prions jump species barrier

Nature ◽  
2008 ◽  
Author(s):  
Amber Dance
Keyword(s):  
Species Barrier
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