title: Gene expression profiles deciphering leaf senescence variation between early- and late-senescence cotton lines
design: Leaf senescence varies greatly among genotypes of cotton (Gossypium hirsutium L), possibly due to the different expression of senescence-related genes. To determine genes involved in leaf senescence, we performed genome-wide transcriptional profiling of the main-stem leaves of an early- (K1) and a late-senescence (K2) cotton lines at 110 day after planting (DAP) using the Solexa technology.