Double-cropping early-season rice is one important part of staple crop rice. In recent years, great progress has been made in breeding the double-cropping early-season japonica rice variety, ZhongKeFaZaoGeng1 (ZKFZG1), with high yield, good quality, and high resistance. The breeding of ZKFZG1 aimed at the severe problems of low quality, low income and pre-harvest sprouting in double-cropping early-season rice production, and was achieved through molecular design by selecting three parents with different beneficial genes, KongYu131, NanFangChangLiGeng, and JiGeng88 and screening for key agronomic genes in cross-breeding. ZKFZG1 has a compact plant architecture, a plant height of ~90 cm, a number of ~120 grains per panicle, a setting rate of ~85%, a 1000-grain weight of 26 grams, a yield of 8.25 t/ha, and especially good grain quality. The successful breeding of ZKFZG1 provides a new direction for double-cropping early-season rice production.
双季早稻生产是粮食产业的重要组成部分。近期，双季早粳稻品种培育取得了重要进展，育成了兼具高产、优质、高抗的中科发早粳1号等双季早粳稻新品种/系。中科发早粳1号是利用分子设计育种体系，针对双季早稻生产中长期难以解决的经济效益低、稻米品质差、早期耐寒差和易穗萌等问题，选取含有不同优异基因的空育131、南方长粒粳与吉粳88为亲本，通过关键基因筛选聚合培育而成。中科发早粳1号株型紧凑，株高90厘米，每穗粒数120粒，结实率85%，千粒重26克，每公顷产量8.25吨，主要米质指标达到部颁粳稻品种品质等级二级及以上。中科发早粳1号的成功培育将为双季早稻产业发展提供新的思路与动力。.
Keywords:
breeding by molecular design; double-cropping early-season