优良晚籼新组合博优253的育成及其表现特点

Breeding process and characters of a new and important combination of indica type late hybrid rice Bo You 253 in south China

博优253是广西大学支农开发中心利用自选的强优恢复系测253与博A配组,于1996年晚造育成的晚籼新组合。经多年多点大面积种植表现高产、优质、多抗,全生育期120d,适合华南及种植晚籼中熟组合的地方种植。其产量一般为7500kg/hm2,高产的达9750kg/hm2,米质大部分指标达部颁优质米1～2级标准,大田种植抗病力强。博优253于1996年晚造育成。1998～1999年参加广西区域试验;2000～2001年参加华南晚籼国家级试验。2000年12月通过广西区农作物品种委员会审定。

A new hybrid rice combination Bo You 253 had been bred by the Development Center for Surporting Agriculture of Guangxi University in 1996 It was from crossing the male sterile line Bo A with the restorer line Ce 253 which was bred by our centre and with strong hybrid vigor The test results of planting in different site and large scale through several years indicated that it had high yield potencial, excellent grain and cooking quality, multiple resistances ability, 120 days growth duration and suitable to the region of second crop indica varieties in south China It's unit yield was 7 500 kg/hm2 generally,the highest yield was 9 750 kg/hm2.Most of it's grain quality indexes reached 1~2 grade of national standard It had been passed through Guangxi Autonomous Region and south China network of rice varietal tests in 1998~1999 and 2000~2001,respectively.It had been examined and approved by Guangxi Committee of Approving Crop Varieties in 2000