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expand all sections collapse all sections  Oryza sativa QTL "CQI10"
ID 51373
Name CQI10 (QTL ACCESSION {description)
Synonyms (1) CQI10-NAKRO
TO TERM {descriptionTO:0000525 (sodium to potassium content ratio)
Trait Namesodium to potassium ratio
Trait SymbolNAKRO
Type QTL
Species Oryza sativa (Oryza sativa) [ GR_tax:013681 ]
Germplasm
Description Na to K ion concentration ratio for respective ion concentrations (mmol per g)
in the shoot as the product of concentration and dry mass. Three completely
randomized blocks containing all the lines were grown at the same time. The
hydroponic culture solution was salinized at 10 days after planting, by slowly
adding 5 M NaCl to the header tank of a recirculating pump so that the
concentration rose gradually to 50 mM over a period of about 24 h and was
maintained for 12 d, after which the concentration was increased to 100 mM for a
period of 8 days. The shoots were then harvested, dried, weighed, and extracted
in 100 mM acetic acid for 2 h at 90°C. Sodium and potassium were determined in
the extract by atomic absorption spectroscopy (Unicam 919, Unicam, Cambridge,
UK). The major pathways of uptake of sodium and potassium in rice are in
parallel and not directly in competition, the uptake of the two ions was
expected to be independent. QTL analysis was performed using the marker
regression approach using the software package QTL Café. Associations between
genetic markers and traits were detected by single-marker ANOVA for each trait
using GENSTAT (P < 0.005).
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