玉米的雌雄穗开花间隔研究进展

Progress on the study of anthesis-silking interval in maize

在玉米开花期因受环境胁迫会导致果穗生长减缓 ,雄穗与雌穗的开花间隔加大。此现象称为雌雄穗开花间隔 (ASI) ,或吐丝延迟、同步性丧失、雄性先熟等。在胁迫条件下 ,玉米的产量与ASI呈显著的正相关。综述了前人在干旱、密植、低氮、及长光胁迫对玉米产量与ASI的影响。ASI的改变可能预示在开花期新形成的同化物在分配上的差异。ASI可作为抗逆玉米种质筛选的主要性状之一。

Maize ears growth slows down in relation to environment stress at flowering while the interval between anthesis and silking was enlarged. This phenomenon is called Anthesis Silking Interval(ASI), or silk delay, loss of synchrony, protandrouse flowering. Maize grain yield and ASI showed significant positive correlation under stress conditions. This paper reviewed the effects of stress factors such as drought, high density, low nitrogen and long photoperiods on the grain yield and ASI. The changes in ASI may indicate the differences in partitioning of currently formed assimilate to the ear at flowering. ASI can be used as one of the main traits in the stress tolerant maize germplsm selection.