Quantitative Trait Loci Mapping of Leaf Morphological Traits and Chlorophyll Content in Cultivated Tetraploid Cotton Identification and fine mapping of quantitative trait loci for seed vigor in germination and seedling establishment in rice Quantitative trait locus mapping with background control in genetic populations of clonal F1 and double cross Sensitivity of GA3 Treatment on Seedling Traits and Its QTL Dissection in Rice(Oryza sativa L.)