Abstract:

Water-saving and drought-resistance rice is a new type of cultivated rice with high yield, good quality and water-saving and drought-resistance characteristics. Huhan 7A is an indica type three line male sterile line bred by Shanghai Agricultural Biological Gene Center and Shanghai Tiangu Biotechnology Co., Ltd. with Wuxiang B/Neixiang B//Huhan 1B as parents, through a multiple crossing system breeding. It has the characteristics of stable fertility, strong drought resistance, good grain quality and good combining ability. The water-saving and drought resistant rice combinations, such as Hanyou 73 and Hanyou 3015, selected from the parents of Huhan 7A, have shown strong hybrid advantages and have been widely used in production. This paper introduced the characteristics of Huhan 7A, analyzed and evaluated the growth period, resistance and yield of its hybrid combinations, and put forward the precautions and improvement directions when using Huhan 7A, to provide scientific basis for the application of Huhan 7A as the core parent of water-saving and drought-resistance rice.

Key words: rice, water-saving and drought-resistance rice, Huhan 7A, breeding, prospects

摘要：

节水抗旱稻是同时具有水稻高产优质和旱稻节水抗旱特性的一种新的栽培稻类型。沪旱7A是上海市农业生物基因中心与上海天谷生物科技股份有限公司以武香B/内香B//沪旱1B为亲本杂交选育而成的籼型三系不育系，具有育性稳定、抗旱性强、米质优良、配合力好等特点。以沪旱7A为亲本选配的节水抗旱稻组合旱优73、旱优3015等表现出很强的杂种优势，已在生产上大面积应用。本文介绍了沪旱7A的特征特性，分析评价了其所配组合的生育期、抗性、产量等指标，提出了使用沪旱7A配组新组合时需要注意的事项和改良的方向，为沪旱7A作为节水抗旱稻核心亲本推广应用提供科学依据。

关键词: 水稻, 节水抗旱稻, 沪旱7A, 育种, 展望