Comparison of testers used to evaluate unadapted maize populations

摘要: Evaluation of the many unadapted maize (Zea mays L.) accessions in world's gene banks is a monumental task. Testcrossing to tester or series testers has been proposed as procedure for evaluating them quantitative traits, such grain yield. The objec­ tive this study was compare eight and accessio'ns per se sources favorable genes enhancing yield other traits. Testers included populations BS13 BS26, single crosses B14xB37 Oh43xMol7, inbreds B37, B14, Oh43, Mol7. germplasm (PICs) were di­ verse array 34 collected from Yugoslavia. 272 testcrosses crossing PICs by evaluated randomized complete block designs with each containing set either within tester, se. Field experiments conducted at three locations Iowa over years (1985-1987). Significant variation occurred among sets yield, moisture, root lodging, stalk days anthesis, plant height, ear height. Testcrosses B14xB37, Mol7 did not interact environments BS26 had highest those B14 lowest lodging. rank somewhat similarly but extreme differences ranking different also occurred. most