FACTORS THAT CONTRIBUTE TO LACK OF GENETIC PROGRESS

摘要

Researchers and breeders tend to take credit for periods when yields are increasing. They also tend to blame weather for periods when yields aren.t increasing. To do so precludes finding the causes limiting yield increases. This symposium has takenthe bold step to address the factors, primarily diseases and nematodes, that might impact the lack of yield increases in the last 10 years. The specific objective of this presentation is to address the genetic factors that contribute to yield stagnation.To do so requires that you also examine the main effects that non-genetic factors have on yield. The approach is to first establish if yields aren't increasing. Following this, the question on what impact weather and pests have had on stagnant yields will be investigated. Finally, factors that influence genetic progress, especially those specific for cotton will be given.