Abstract
Five Australian wild cotton species with the delayed gland morphogenesis trait, as well asG arboreum, G davidsonii and four different gland genotypes ofG hirsutum, Gl2Gl2Gl3Gl2, Gl2Gl2gl3gl3, gl2gl2Gl3G3, and gl2gl2gl3gl3, were used in this experiment and 10 interspecific hybrids were obtained by the crossing among them. According to the gland expression on the seeds and plants of the interspecific hybrids, the inheritance of the delayed gland morphogenesis trait of Australian wild cotton species was opened out as follows: ( i ) the inheritance of the delayed gland morphogenesis trait was almost the same among the 5 Australian wild cotton species, and the gene or genes which controlled this trait may be located in the same loci. (ii) The glandless seed trait of the Australian wild cotton species was dominant over the glanded seed trait ofG arboreum, a genome A species, and the seeds of interspecific hybrid F1 between them were glandless. However, it was recessive over the glanded character of genome D species,G davidsonii, and their F1 was a typical glanded one. (iii) The glandless seed trait of the Australian wild cotton species was recessive or incomplete dominant over the glanded cotton but dominant over the glandless cotton ofG hirsutum, and the glandless genes (gl2gl2gl3gl3 of upland cotton had great weakening effect on the glanded plant trait of the Australian wild cotton species on the other hand. For the two main glanded genes of upland cotton, the delayed gland morphogenesis trait of the Australian wild cotton species was dominant epistatic over glandless genes, gl2gl2gl3gl3, and one of the glanded genes, Gl2Gl2, but was recessive epistatic over the other glanded gene, Gl3Gl3. Therefore, it is much convenient to use Gl2Gl2gl3gl3 as the upland cotton parent in the interspecific hybridization and backcrossing afterward, in order to produce the upland cotton germplasm with glandless seeds and glanded plant trait.
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Zhu, S., Ji, D. Inheritance of the delayed gland morphogenesis trait in Australian wild species ofGossypium . Chin.Sci.Bull. 46, 1168–1174 (2001). https://doi.org/10.1007/BF02900595
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DOI: https://doi.org/10.1007/BF02900595