RFLP mapping of QTLs for photoperiod response in tropical sorghum |
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Authors: | J Chantereau G Trouche JF Rami M Deu C Barro L Grivet |
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Institution: | (1) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), TA 70/01, 34398 Montpellier Cedex 5, France;(2) CIRAD, 01 BP 596, Ouagadougou 01, Burkina Faso;(3) EURALIS GENETIQUE, 7 rue Hermès, 31520 Ramonville St-Agne, France;(4) Institut de l'Environnement et des Recherches Agricoles (INERA), CRREA Saria, BP10, Koudougou, Burkina Faso |
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Abstract: | Genetic control of flowering time in sorghum was investigated using a recombinant inbred lines population derived from a cross
between IS 2807, a slightly photoperiod sensitive tropical caudatum landrace, and IS 7680,a highly photoperiod sensitive tropical
guinea landrace. Progenies were sown with their parents at six different dates between 1995 and 1997 in Burkina Faso. Direct
field measures and synthetic measures derived from the implementation of a model were used to characterize the photoperiod
response. Emphasis was put to identify the most relevant traits to account for Basic Vegetative Phase (BVP) and photoperiod
sensitivity sensus stricto. One QTL was detected on Linkage Group (LG) F for the traits related to BVP. Two QTLs were detected on LGs C and H for the
traits related to the photoperiod sensitivity sensus stricto. This gives credit to at least partially independent genetic determinisms for those two components of photoperiod response.
Evidences for possible orthology of the QTLs detected here with other QTLs and major genes involved in flowering time of sorghum
and rice are discussed.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | maturity genes photoperiod sensitivity QTL RFLP rice sorghum |
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