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近些年来我们以“早熟、耐冷、高产”为寒冷稻作区的主要育种目标,开展了耐冷性鉴定工作。在前报(1)里着重论述了水稻品种耐冷性能的鉴定方法,未涉及耐冷性能与产量的关系问题。在以安全成熟为前提的早熟高产品种的选育上,耐冷性能的作用究竟有多大?它与产量之间有什么直接或间接关系?只有弄清这些问题,才能更好地明确育种目标,提高育种效果,并且能为早熟高产栽培提供科学依据。
In recent years, we have carried out identification of cold tolerance in order to “precocious, cold-tolerant and high-yielding” as the main breeding target for cold paddy areas. In the former newspaper (1), the method of identification of cold tolerance of rice varieties is emphatically discussed. The relationship between cold tolerance and yield is not covered. What is the role of cold tolerance in the selection and breeding of precocious and high-yielding varieties on the premise of safety maturity? What is the direct or indirect relationship between the cold tolerance and yield? Only by understanding these problems can we better define breeding objectives and improve Breeding effect, and can provide scientific basis for early maturity and high yield cultivation.