Analysis of the microsporogenis of BC2A and BC3 plants issued from the Gossypium hirsutum L. X Gossypium raimondii Ulb. X Gossypium sturtianum Will. | Analyse de la microsporogenese chez la desendace BC2A et BC3 de l'hybride trispecifique Gossypium hirsutum L. X Gossypium raimondii Ulb. X Gossypium sturtianum Will.
2000
Sanogo, M.D. | Vroh Bi, I. | Baudoin, J.P. | Mergeai, G. (Faculte universitaire des Sciences agronomiques, Gembloux (Belgium). Unite de Phytotechnie des Regions intertropicales)
In order to introgress the low-gossypol-seed and high-gossypol-plant trait in the main cultivated cotton species, a BC2 plant issued from the HRS trispecific hybrid [(Gossypium hirsutum x Gossypium raimondii,) 2 x Gossypium sturtianum] was backcrossed to G. hirsutum and self pollinated. Cytogenetics analysis of BC3 and BC2S plants showed a significative improvement of chromosome pairing and pollen fertility compared to their parents. About one third of the BC3 hybrids presented an important reduction in their seed gossypol glands. These genotypes constitute very promising genetic stocks for the development of commercial cotton varieties with low gossypol content in the seeds and normal gossypol content in the rest of the aerial parts.
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