我国寒冷地区玉米品种(系)抗冷性筛选原理与技术体系的应用研究

Study on Screening Meclanism of Corn Varieties (Strains) for Cold Hardiness and Its Application in China's Cold Regions

本项研究创建和完善了一套规范化的利用多种鉴定方法(田间鉴定、人工模拟逆境筛选和实验室多项指标测定),运用综合指标评价玉米品种抗冷性的技术体系,并确定了指标的内在联系,使抗冷性指标数量化。用以上方法对7663份玉米品种(系)进行了芽期、苗期和灌浆期抗冷性评价,并从中筛选出强抗冷材料1569份,育成6个抗冷杂交品种,在黑龙江、辽宁中、北部地区推广利用,获得显著经济效益。本研究在作物抗逆生理和测定技术上有所突破和创新。

A standardized evaluation system for maie cold hardiness was proposed. It was combined with field test, imitated cold-stress test and multiple laboratory target assay, and had been verified to be a reliable technique for both phenotype and genotype screening at different growth period. The potential use of the system on maize breeding was discussed.