“双季同种”是笔者根据湖南早晚稻生产和消费需求提出的育种设想,即在湖南同一个稻区,同一个品种通过早稻、晚稻“双审定”,且两季总生育期不超过220.0 d、两季总产量超过1 000.0 kg/667 m²,早季米质达部标优质3级及以上,晚季米质达部标优质2级及以上。据此育成的水稻新品种松雅7号具有株型紧凑、茎秆粗壮、耐密植、芽期耐低温低氧能力较强等特点,在湖南省作早、晚双季稻种植生育期适宜、米质较好、丰产稳产,适宜机插、直播等轻简栽培。2023年通过湖南省早稻审定,2024年通过湖南省晚稻审定。本文介绍了松雅7号的选育经过和特征特性,及“双季同种”的概念、品种选育思路和具体要求,讨论了“双季同种”生产模式的实际意义。

The“double-season with same variety” is a breeding idea proposed by the author based on the consumption demand and early and late rice production situation in Hunan Province. It means that in the same rice area in Hunan Province, the same variety is “double-approved” for early and late rice, and the total growth period of the two seasons does not exceeds 220.0 days, and the total yield of the two seasons exceeds 1 000 kg/667 m², the quality of early rice reaches the Ministry of Agriculture’s high-quality level 3 or above, and the quality of late rice reaches the Ministry of Agriculture’s high-quality level 2 or above. The new rice variety Songya 7, developed based on this, has the characteristics of compact plant type, thick stem, tolerance to dense planting, and strong resistance to low temperature and low oxygen during the germination stage. It is suitable for early and late double-cropping rice in Hunan Province, with good rice quality, high and stable yield, and suitable for light and simple cultivation such as machine transplanting and direct seeding. It was approved as early and late rice in Hunan Province in 2023 and 2024, respectively. This article introduced the breeding process and characteristics of Songya 7, as well as the concept of “double-season with same variety”, the breeding ideas and specific requirements, discussed the significance of the “double-season with same variety” production model in rice production.