1.   And because most commercial crops have been bred for high yields, many of the genes for disease resistance have been lost.

2.   A clone is an asexually reproduced plant that retains the genetic features of the parent but can vary in longevity, disease resistance and quality of fruit.

3.   A. Doctors believe that individual variations in disease resistance may affect anthrax, just as it affects other diseases caused by bacteria.

4.   Breeders had to achieve stress tolerance, disease resistance, insect resistance and desired milling quality.

5.   Disease resistance and size should be the main concerns when choosing a crab apple.

6.   Disease resistance for a particular variety is indicated by V for resistance to verticillium wilt and F for resistance to fusarium wilt.

7.   Each plant has been selected for ease of growth, disease resistance, and beauty by panels including gardeners and landscapers.

8.   For instance, scientists at AviGenics Inc. in Athens, Ga., are in the early stages of trying to engineer disease resistance into chickens.

9.   He emphasizes vigilant tree care over disease resistance and totes new fungicides.

10.   Newborns have incomplete immune systems and rely for disease resistance largely on antibodies remaining in their bloodstreams from their mothers for several weeks to months after birth.