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Linkage Relationships between Le and Gl Alleles in Cotton 1
Author(s) -
Lee Joshua A.
Publication year - 1982
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1982.0011183x002200060029x
Subject(s) - biology , allele , centimorgan , locus (genetics) , genetics , gossypium hirsutum , gossypium , gene mapping , gene , botany , chromosome
The major leaf‐gland alleles of cotton, Gossypium hirsutum L., Gl 2 and Gl 3 , were shown to be linked with the complementary lethality alleles, Le 1 and Le 2 . Linkage between Gl 2 and Le 1 was estimated at 27.5 ± 2.8 centimorgans, and linkage between Gl 3 and Le 2 was estimated at 22.9 + 2.2 centimorgans. Because the complementary lethality allele from G. davidsonii Kell., Le dav is also linked with the gl 3 locus of Gossypium , the question arose as to whether or not Le, dav and Le 2 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 Le 2 and Le dav although antagonistic in combination, are alleles at a common locus.