Breeding for Resistance and Susceptibility to Avian Lymphomatosis

Breeding for resistance to flystrike

Electron microscopy of avian lymphomatosis virus propagated in tissue culture.

Viruses isolated from avian erythroblastosis and myeloblastosis have been extensively investigated with the electron microscope (3-5, 8, 11, 1~). However, avian lymphomatosis virus has been studied by electron microscopy only in infected tissue sections (7), although a particulate component has been reported in the plasma of infected fowl (13). Wi th the successful cultivation of the lymphomato...

Breeding for Salt-Resistance Using Transgressive Segregation in Spring Wheat

Hybrid populations (F3) derived from cross between four moderate salt-resistant spring wheat (Triticum aestivum L.) were assessed for transgressive segregation of salt-tolerant genotypes allowing germination and emergence at 350 mM NaCl for 30 days. The achieved Selection intensity was the order of 0.24-0.27 in these segregation populations (22-25 seedlings from 9000 seeds). Assessment of trans...

Isolation, Identification and in vitro Susceptibility of Avian Escherichia coli to Selected Fluoroquinolones

Breeding plants for resistance to nematodes.

Plant breeders and nematologists have developed improved cultivars of important crop species with resistance to plant-parasitic nematodes. The effectiveness of these breeding efforts has depended on the availability of efficient screening procedures, identification of adequate sources of durable resistance, nature of the nematode feeding habit, and knowledge of the inheritance of resistance. Th...