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Genotypic reactions to boll weevil attack in Upland cotton



Genotypic reactions to boll weevil attack in Upland cotton



Jour Econ Ent 51(4): 508-512



Mutant lines of Upland cotton carrying any 2 of 4 mutant genes, H1, H2, gl and R1, which promised to confer a certain degree of resistance to attack by boll weevil (Anthonomous grandis Boh.) were tested together with lines having the same genetic background but differing by opposite alleles to the genes under test. All mutant lines showed varying degrees of resistance to boll weevil attack; the lines combining H1 and H2 to the highest degree, those combining gl and H2, and gl and H2, ranking 2d and 3d. Lines carrying the genes R1 in combination with gl or H2 were tested in a separate experiment. Both strains showed a relatively high degree of resistance. The main effects of the mutant genes, H1, .H2 and gl, could only be estimated on the assumption that their interactions were unimportant. On this basis the data obtained in the experiments indicate that H2 contributed more to resistance than H1 while gl had no significant effect.

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Accession: 014060591

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DOI: 10.1093/jee/51.4.508


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