Linkage Relationships between Le and Gl Alleles in Cotton1
- Joshua A. Lee2
The major leaf-gland alleles of cotton, Gossypium hirsutum L., Gl2 and Gl2, were shown to be linked with the complementary lethality alleles, Le1 and Le2. Linkage between Gl2 and Le1 was estimated at 27.5 ± 2.8 centimorgans, and linkage between Gl3 and Le2 was estimated at 22.9 + 2.2 centimorgans. Because the complementary lethality allele from G. davidsonii Kell., Ledav is also linked with the gl3 locus of Gossypium, the question arose as to whether or not Le,dav and Le2 are alleles at a common locus. Direct methods of testing are not possible inasmuch as combining the two alleles in a zygote results in the death of the embryo, or the plant, stemming therefrom. However, indirect results as well as reconstruction of probable pathways in the evolution of alleles at the le loci in various Gossypium taxa led to the tentative conclusion that Le2 and Ledav although antagonistic in combination, are alleles at a common locus.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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