Abstract:

The resistance to heat of Regengyou 35 was evaluated by natural high temperature in 2016-2017, at Rice Foundation Seed Farm of Dengjiabu of Jiangxi province. The results indicated that the resistance to heat of Regengyou 35 was signficiant better than Y Liangyou 1, during two weeks of 36℃~38℃, and the seed setting rate exceeded 75%. It has adequate grouting and full grains, the yield is similar to Y Liangyou 1. Therefore, this variety shows good resistance to heat in single-season rice areas of Jiangxi province and has good prospects of popularization and application.

Key words: hybrid japonica rice, natural high temperature, field performance, evaluation of resistance to heat

摘要：

2016-2017年在江西省邓家埠水稻原种场，采用田间自然高温方法鉴定了耐热杂交粳稻品种热粳优35的耐热性，并对其农艺性状进行了评价。结果表明，热粳优35在抽穗期遇到连续2周持续36℃~38℃高温天气的情况下，耐热性表现良好，灌浆充分，籽粒饱满，2年的平均结实率均超过75%，显著优于Y两优1号，产量水平与Y两优1号相当。可见，热粳优35在江西一季稻区表现出良好的耐热性，具有良好的推广应用前景。

关键词: 杂交粳稻, 自然高温, 田间表现, 耐热性评价