冷型小麦及其育种意义

通过多年对小麦不同品种群体温度的连续观测，结果发现：自然界存在冷型小麦，其冷域发达，叶片功能期较长，蒸腾旺盛，净光合率较高，十分利于籽粒充实。由于冠层温度和小麦的一系列重要性状紧密相关，因而，这为利用红外技术选择优良株系、品系、品种提供了可能。

Cold Typal Wheat and Its Breeding Meaning

On the basis of continual temperature observation of wheat populationsof different varieties for many years,cold typal wheat has been discovered in nature.The wheat has longer time limits with temperattire which is lower than that of controlwheat,longer functional period of leaves,stronger evaporation and higher net photo-synthetic rate,which are partictilarly favourable to enriching grains.Owing to the closerelationship between the temperature of covering layer and a series of important charac-ters of the wheat,there exists a possibility of using infrared technique for the selectionof excellent parentages,lines and varieties.