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一个理想的棉花品种,应能抗多种病虫害和不良环境条件,并具有较高的皮棉产量和优良的纤维品质.棉花品种遗传改良MAR(Multi-AdversityResistance,多抗逆性)体系,就是以此为目标的一种不同于常规的育种方法.1963年Bird等在美国德克萨斯州立大学农业试验站开始采用这一方法进行棉花育种工作.1973年以来,已成功地发放了SP21,SP23,SP37,SP37H,CAMD-E,SP21S等6个品种.截至1982年,MAR体系的品种已占德克萨斯州棉田面积的33%(约合1400万亩).这些品种的共同点是皮棉产量高(在病区尤为突出),
An ideal cotton variety should be able to resist a variety of pests and diseases and adverse environmental conditions, and has a high lint yield and good fiber quality MAR genetic modification MAR (Multi-AdversityResistance, multi-resistance) system, is to As a target different from the conventional method of breeding .In 1963, Bird et al. Started the cotton breeding work at the Texas State University Agricultural Experiment Station in 1963. Since 1973, SP21, SP23, SP37, SP37H, CAMD-E, SP21S etc. As of 1982, the MAR system accounted for 33% of the area of Texas cotton fields (about 14 million mu) .The commonalities of these varieties are lint yield High (especially prominent in the ward),