1.Using composite interval mapping, 5 QTL were detected across seedling, elongation, anthesis and adult stages in spring crop, located on chromosomes 3, 4, 5, 6 and 8, respectively, expressing 4.5% to 32.6% of phenotypic variance.
2.The importance,the method,the management and the problems of tropical crop seed and seedling quality testing and the ways to deal with the problems are discussed.
3.Results indicated that RDI may reduce dry matter accumulation to a extent, relevant to seriousness, lasting time of RDI and crop growing stage when RDI treat was carried out.Ratio of root/shoot, TTC contain in root increased, while number and total length of root per seedling decreased.
