作 者：
戴高兴;邓国富;陈仁天;梁世荣;周萌;周维永;高利军;张宗琼
单 位：
广西农业科学院;广西农业科学院水稻研究所
摘 要：
【目的】培育杂种优势强、产量高、适应性广的早晚兼用型超级稻,为广西水稻的高产、稳产及粮食安全生产提供保障。【方法】2004年以自选育的水稻光温敏不育系桂科-2S与广亲和强恢复系桂恢582配组后,2005年在广西农业科学院水稻研究所试验地进行品比试验,2006~2007年参加广西桂南稻作区早造迟熟组区域试验和生产试验,对其综合表现进行观察。【结果】桂两优2号具有高产、稳产、适应性广等特点,生育期早造121 d、晚造116 d左右,每穗平均粒数160粒左右,结实率88%,千粒重22.0 g。2005年早造品比试验,桂两优2号平均产量为8797.5 kg/ha,比对照特优63增产6.30%;2006、2007年参加广西桂南稻作区早造迟熟组区域试验和生产试验,平均产量分别为8646.0、8281.5和8389.5 kg/ha,分别比对照特优63增产9.17%、8.44%和8.10%。2007年早稻在玉林市陆川县百亩高产示范种植桂两优2号,高、中、低产田平均产量为11110.2 kg/ha;2012年早、晚稻在玉林市陆川县的百亩连片双季超级稻丰产示范试验中,早晚稻总产量为21380.1 kg/ha,平均为10690.1 kg/ha。【结论】桂两优2号是广西育成的第一个本土超级稻品种,具有良好的应用前景,适宜在广西桂南稻作区作早、晚稻种植,在广西桂中、桂北稻作区作一季早稻或中稻种植。
译 名：
Breeding and application of a new two-line super rice variety Guiliangyou 2 for early/late-cropping dual-usage
作 者：
DAI Gao-xing;DENG Guo-fu;CHEN Ren-tian;LIANG Shi-rong;ZHOU Meng;ZHOU Wei-yong;GAO Li-jun;ZHANG Zong-qiong;Rice Research Institute,Guangxi Academy of Agricultural Sciences;Guangxi Academy of Agricultural Sciences;
关键词：
super rice;;Guiliangyou 2;;breeding;;Guangxi
摘 要：
【Objective】The present study was conducted to breed early/late-cropping dual-usage super rice variety with strong heterosis, high yield, wide adaptability in order to provide supports on high-yield, stable yield and food safety production in Guangxi. 【Method】In 2004 a self-bred photo-thermo sensitive genic male sterile line Guike-2S, and a strong restoring line with wide compatibility Guihui 582, was crossed to obtain Guiliangyou 2, followed by investigating its comprehensive trait performances in variety comparative test in 2005, and Guangxi regional trial and producing tial of early season late-maturing rice group during 2006-2007. 【Result】Guiliangyou 2 has characteristicss of strong heterosis, high yield, stable yield, wide adaptability, etc. Its growth duration was 121 and 116 days at early and late cropping, respectively. The variety was charactered by 116 cm of plant height, 160 grains per panicle, 88% of seed setting rate and 22.0 g of 1000-grain weight. The yield of Guiliangyou 2 was 8797.5 kg/ha in variety comparative test in 2005, which was increased by 6.30% as compared to the control Teyou 63. In Guangxi regional trial and producing trial during 2006-2007,the average yield of Guiliangyou 2 were 8646.0, 8281.5 and 8389.5 kg/ha, which were increased by 9.17%, 8.44% and8.10% compared with the control Teyou 63, respectively. During early cropping high-yield demonstration test(6.67 ha) in Luchuan county of Yulin city in 2007, the average yield of Guiliangyou 2 in high-yield, moderate-yield and low-yield fields was 11110.2 kg/ha. In super rice double-cropping high-yield demonstration test(6.67 ha) in Luchuan county of Yulin city in 2012, its total yield of early-and late-cropping was 21380.1 kg/ha with an average of 10690.1 kg/ha.【Conclusion】Guiliangyou 2, the first self-bred super rice variety with better application prospect, is suitable for planting as early and late rice in south regions of Guangxi, and as single early cropping rice or a middle-season rice in middle and north regions of Guangxi.
