Evtushenko E V, Chekurov V M
Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.
Hereditas. 2004;141(3):288-92. doi: 10.1111/j.1601-5223.2004.01866.x.
The effects of low/high light intensities and day length on ear emergence time in climatic chambers were studied in 12 common wheat (Triticum aestivum L.) cultivars of different ecogeographical origin. Low light intensity (LI) affected the time to ear emergence in all the wheat cultivars of both the photoperiod sensitive and insensitive genotypes, increasing the number of days to ear emergence (DEE). Based on the increase in DEE, we chose samples with different light intensity responses among the cultivars and analyzed their F2 hybrids to see if they were segregating. Taken together, the data for the F2 plants and test cross showed that the strong response to light intensity is a recessive trait and that the parental cultivars differ by the two genes controlling the LI response in common wheat. Besides heading time, low LI increased the number of days to tillering in all the cultivars except Pitic 62, but short day affected the period to tillering less than low LI. The symbol Rli (the response to light intensity) is suggested to designate the genetic control of the response to LI in wheat. Thus, the response to LI may influence the adaptability to changing environmental conditions and yield of wheat cultivars.
在气候箱中，研究了低/高光强度和日照长度对12个不同生态地理起源的普通小麦（Triticum aestivum L.）品种抽穗时间的影响。低光强度（LI）影响了光周期敏感和不敏感基因型的所有小麦品种的抽穗时间，增加了抽穗天数（DEE）。基于DEE的增加，我们在品种中选择了具有不同光强度反应的样本，并分析了它们的F2杂种，以查看它们是否发生分离。综合来看，F2植株和测交的数据表明，对光强度的强烈反应是隐性性状，亲本品种在控制普通小麦LI反应的两个基因上存在差异。除了抽穗时间外，低LI增加了除Pitic 62外所有品种的分蘖天数，但短日照对分蘖期的影响小于低LI。建议用符号Rli（对光强度的反应）来表示小麦对LI反应的遗传控制。因此，对LI的反应可能会影响小麦品种对不断变化的环境条件的适应性和产量。
