Faithin Omaha eBook Collection

Download or read book Divergent Mass Selection for Ear Length in the Iowa Long Ear Synthetic Maize Cultivar After Twenty-seven Cycles of Selection written by Jose de Jesus Lopez-Reynoso and published by . This book was released on 1997 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hence, improvement in grain yield in the longer-ear subpopulation was canceled by a significant reduction of the kernel-row number and ear diameter. The rate of inbreeding depression of ear length and yield remained constant during the course of selection in the longer-ear subpopulation, but it was gradually reduced with continued selection in the shorter-ear subpopulation. No heterosis was observed in the crosses between corresponding cycles of selection. Estimates of genetic variability among S1 progenies showed no evidence that genetic variance is been exhausted. Hence, further progress in selection is expected in both short- and long-ear subpopulations.