Heritability of Verticilium Wilt Tolerance in Crosses of American Upland Cotton1
- Carl L. Roberts and
- Glen Staten2
Broad-sense heritability estimates of tolerance to Vertieillimn wilt [Verticillium albo-atrum (Reinke and Berth)] under severe field exposure in American Upland cotton (Gossypium hirsutum L.) were compared using F1 and F2 generations of tolerant ✕ susceptible crosses. Heritability estimates varied from 0 to .833, depending upon exposure level, generation tested, and type of parental tolerance present.
Tolerance to Verticullium wilt was found to be recessive for the crosses studied. Selection based on progeny row yield was effective when Verticillium wilt was severe.
Susceptible F2 plants produced homozygous susceptible F3 rows but progeny testing of tolerant F2 plants was necessary to detect escapes.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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