The disease resistance phenotype of T₃ transgenic cotton lines in the verticillium wilt artificial nursery.

<p>A. Disease symptoms of verticillium wilt at the cotton flowering stage. The leaf shows yellow or brown spots and curled leaf edges. B. The disease resistance phenotype of the T₃ transgenic cotton lines (KB1, KB2, KB3) and the negative control lines (z99668) at the flowering stage in the cotton verticillium wilt artificial nursery. Three T₃ transgenic cotton lines did not exhibit disease symptoms, while the leaves of the negative control lines (z99668) showed yellow or brown spots and curled leaf edges, some leaves dropped.