水稻多基因型种群品种田间抗病丰产试验

【目的】评价水稻多基因型种群品种在云南省德宏地区的适应性、抗病性和丰产性,为水稻多基因型种群品种在云南的推广应用和丰富云南农田农业生物多样性提供科学依据。【方法】2015年用尤群6号、南八糯、多集新15号、多集新16号、广多18号和广尤1号共6个水稻多基因型种群品种,以单一基因型优质高产籼稻品种红优7号为对照,在云南省籼稻区德宏州芒市开展田间品种比较试验,通过生育期、抗病性、农艺性状、产量等指标对参试品种进行综合评价。【结果】多基因型种群品种的田间稻瘟病病情指数为0.41~2.49,属于轻发生和偏轻发生;稻曲病病情指数为3.23~7.62,属于偏轻发生;田间未发生白叶枯病。品种群体内株高变异系数较小,介于3.25~4.56,农艺性状一致。参试品种产量为9459.0~10960.5 kg/ha,显著高于对照品种(P0.05)。【结论】供试6个水稻多基因型种群品种在云南籼稻区德宏田间整齐度好,农艺性状稳定,适应性强,表现出较好的抗病性、丰产性和稳定性,适宜在云南德宏地区推广种植。

Field experiment on disease resistance and high yield of rice multi-genotype varieties

Objective]Adaptability, disease resistance and yield of multi-genotype rice varieties in Dehong, Yunnan were evaluated in order to provide reference for promotion of multi-genotype varieties in Yunnan and enrich agricultural biodiversity in Yunnan. Method]Multi-genotype rice varieties Youqun 6,Nanbanuo,Duojixin 15,Duojixin 16,Guangduo 18 and Guangyou 1 were chosen to conduct field experiment through the comprehensive evaluating growth period, disease resistance, agronomic traits, yield and other indicators in comparison of single-genotype indica variety Hongyou 7(control) in Mangshi, Dehong, a indica planting area in yunnan. Result]The results showed that for Multi-genotype rice varieties, rice blast index was between 0.41-2.49,belonging to light occurrence; false smut index was between 3.23-7.62,belonging to light occurrence. Bacterial blight disease did not occurred in field. The varieties had small variable coefficient(3.25-4.56) on plant height and the agronomic traits were consistent. The grain yields (9459.0-10960.5 kg/ha ) of tested varieties were significantly(P<0.05) higher than that of control. Conclusion]The six multi-genotype rice varieties show sound field uniformity, stable agronomic characters, strong adaptability, and satisfactory disease resistance, high yield and stability. Therefore, these varieties are suitable for planting in Dehong, Yunnan.