Factors Affecting in vitro Shoot Elongation of Pepper Phenology of Woody Species in Yuanjiang Dry-Hot Valley in Yunnan Province The Establishment of High-frequency Plant Regeneration System from the Radicle Tip of Chinese Chive(Allium tuberosum Rottler) Provenance Differences of Seedling Shoot Elongation Parameters in Schima superba Combining Ability Analysis on Seedling Shoot Elongation and Growth Parameters for the Third Generation Germplasm of Pinus massoniana