Ecological Regionalization of Cotton Fiber Quality Based on GGE Biplot in Yangtze River Valley Evaluation of Cotton Regional Trial Environments Based on HA-GGE Biplot in the Yangtze River Valley Effects of nitrogen fertilizer application strategy on N uptake, utilization and yield of cotton using 15N trace technique Effects of N+ Ion Implantation into Pollen of Upland Cotton (Gossypium hirsutum L.) on the Expression of Ovule DNA and the cDNA Fragments of M1 Progeny Design of Test Location Number and Replicate Frequency in the Regional Cotton Variety Trials in China Effect of 6-BA and ABA Applications on Yield, Quality and Photosynthate Contents in Subtending Leaf of Cotton with Different Planting Dates Identification of Ideal Test Environments for Multiple Traits Selection in Cotton Regional Trials