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选取102份不同质源的水稻材料,通过水、旱对比试验,以有效穗、穗粒数、千粒重、株高及单株粒重为指标进行聚类分析。结果表明,参试材料可分为5类,其中第Ⅴ类材料Dc平均值为84.88,表现出较强的抗旱性,可用作抗旱亲本材料使用;其次为第Ⅱ类材料,Dc平均值达75.64,当中个别材料的个别性状表现优良,可作为特殊材料使用;最差的是第Ⅳ类,Dc平均值为45.9,表现为不抗旱;第Ⅰ、Ⅲ类材料抗旱性能表现一般。
A total of 102 rice cultivars with different qualities were selected to conduct cluster analysis by using water and drought contrast tests with effective spikes, grains per spike, grain weight per plant, plant height and grain weight per plant. The results showed that the tested materials could be divided into five categories, of which the average value of the fifth class material Dc was 84.88, showing strong drought resistance and could be used as drought resistant parent material, followed by the second class material, the average value of Dc reached 75.64. Among them, the individual traits of individual materials performed well and could be used as special materials. The worst ones were Class IV with an average Dc of 45.9, showing no resistance to drought. The drought resistance performance of Class I and III materials was moderate.