Mapping QTLs for traits related to phenology, morphology and yield components in an inter-specific Gossypium hirsutum×G. barbadense cotton RIL population
| Autor: | Oumarou Palai, John Jacobs, Sophie Georges, Gérard Gawrysiak, Paulo Augusto Vianna Barroso, Jean-Marc Lacape, Tuong-Vi Cao, Marc Giband, José Henrique de Assunção, Shiming Liu, Danny J. Llewellyn, Christopher Viot, David Becker, Janine Jean |
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| Rok vydání: | 2013 |
| Předmět: |
Locus des caractères quantitatifs
Population Gossypium hirsutum Soil Science Quantitative trait locus Biology Coton F30 - Génétique et amélioration des plantes F01 - Culture des plantes Botany Marqueur génétique education Quality characteristics education.field_of_study Phenology Fibre végétale Gossypium barbadense Amélioration des plantes Rendement des cultures Agronomy Hybridation interspécifique Anatomie végétale Plant morphology Carte génétique Phénologie Agronomy and Crop Science |
| Zdroj: | Field Crops Research |
| ISSN: | 0378-4290 |
| Popis: | a b s t r a c t Two major cultivated cotton species, Gossypium hirsutum (Gh) and G. barbadense (Gb) contribute to the bulk of cotton fiber production worldwide (95%). These species are largely inter-fertile and each displays a series of distinctive characteristics in terms of numerous botanical features and, more importantly, in their agronomic performance, adaptability and overall fiber quality. A recombinant inbred line (RIL) pop- ulation derived from an inter-specific cross between Gh and Gb, used previously for QTL mapping of fiber quality characteristics, has also been evaluated over 6 sites and 2 years for various plant morphological, phenological and yield component traits. A total of 27 traits were assessed across a varying number of locations (up to 6 locations, in Australia, USA, Brazil, Cameroon, Belgium and France) and years, represent- ing up to 10 different combinations. Variability in many of these traits was observed among the RILs and they frequently showed transgression. One hundred and sixty six significant QTLs, covering the 27 traits, were detected by composite interval mapping when using individual datasets. Cases of confirmation of localizations of individual QTLs from different data sets were detected in 27 instances, indicating that the 166 individual QTLs in this study could be represented by a maximum of 121 chromosome positions. QTL were shared between traits related to hairiness (22 individual QTLs), plant morphology of vegetative (29 QTLs) and reproductive (37 QTLs) parts, phenology (17 QTLs), and yield-related traits (61 QTLs). This is the first report of QTL mapping in cotton for various within-boll yield-related traits assessed on a per-seed basis, including fiber mass per unit of seed surface area (5 QTLs), calculated number of fibers per seed (2 QTLs) or per unit of seed surface area (1 QTL). This report confirms the importance of considering such basic yield components in selection for better yielding cotton varieties. |
| Databáze: | OpenAIRE |
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