Title: A Genetical Scheme for Isolating Cotton Cultivars<sup>1</sup>
Abstract:When the diploid cotton ( Gossypium davidsonii Kell.) species, is crossed with cultivars of the tetraploid species, G. hirsutum L. and G. barbadense L., the hybrid embryos abort, or the seedlings beco...When the diploid cotton ( Gossypium davidsonii Kell.) species, is crossed with cultivars of the tetraploid species, G. hirsutum L. and G. barbadense L., the hybrid embryos abort, or the seedlings become necrotized and moribund shortly after germination. A complementary lethality intereaction is indicated, the cultivated cottons contributing the factors Le 1 and Le 2 , whereas G. davidsonii contributes at least one factor, Le dav . A rare genotype in G. barbadense is le 1 le 1 le 2 le 2 . Crosses between plants of this genotype and G. davidsonii yield viable triploids. Using the technique of hexaploid bridging, I transferred Le dav from G. davidsonii to the cross‐compatible stock, 15‐4. The resulting stock—genotype le 1 le 1 le 2 le 2 Le dav Le dav —is not cross‐compatible with a series of cultivars of G. hirsutum and G. barbadense . Utilizing the le and Le dav alleles, I produced stocks of G. hirsutum that proved to be genetically isolated from a series of G. hirsutum cultivars under both greenhouse and field conditions. The use of the le ‐ Le dav genetical system for isolating cotton cultivars grown for special purposes, such as gossypol‐free seeds, is discussed.Read More
Publication Year: 1981
Publication Date: 1981-03-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 5
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