Abstract:

A mapping population of 98 backcross inbred lines ( BC1F12 and BC1F13 ), derived from a backcross of Nipponbare (japon-ica) / Kasalath ( indica) // Nipponbare by the single seed descent methods, was employed to map quantitative trait loci (QTL) of the uppermost internode length in rice under different growing environments by composite interval map-
ping method. The results showed that 13 QTLs relating to the uppermost internode length were detected under three differ-
ent growing environments, and these QTLs were located on chromosome 1, 2, 3, 5, 6, 8, 10 and 11, explained 3.97％
-15.21% of observed phenotypic variance, respectively. The locus of qUIL-6 was detected in three growing environments,
and qUIL-1a, qUIL-3a, qUIL-3b and qUIL-10a were detected in two growing environments, indicating that these QTLs were stable and little affected by the environment.