长沙县优质杂交中稻新品种引进及筛选试验

Introduction and Screening of New Mid-season Hybrid RiceVarieties in Changsha County

为筛选出适合长沙县种植的高产优质杂交中稻新品种(组合),以市面购买的10个和北大荒垦丰种业股份有限公司湖南育种站近年培育的12个杂交稻品种(组合)为试验材料进行品种筛选试验,调查了生育期、产量及产量构成因子、田间抗逆性等主要性状,并测定了稻米外观和食味品质性状。结果表明:生育期适宜,能同时满足增产超过5%、米质食味评分高于85分,且外观目测分级在2级以上的高产优质品种(组合)有荃优华占、煌两优粤禾丝苗、辉两优黄丝占、煌两优绿油占、煌两优黄丝占、煌两优五山丝苗、隆两优华占和辉两优粤禾丝苗等8个杂交稻品种(组合);其中荃优华占和隆两优华占2个品种已经审定多年,北大荒垦丰种业股份有限公司湖南育种站选育的6个组合的产量、米质、抗倒性都得到了多年的验证,其稻瘟病抗性均能达到生产应用要求,通过品种审定委员会审定后可在长沙县境内推广种植。

To screen new mid-season hybrid rice varieties with high yield and good quality suitable for being planted in Changsha County,10 hybrid rice varieties(combinations)purchased from the market and 12 hybrid rice varieties(combinations)bred by the Hunan breeding station of Beidahuang Kenfeng Seed Co.,Ltd.,were used as materials in field variety comparison tests.The main agronomic characters,such as growth period,yield,yield components and field stress resistance were investigated,and their milling and eating qualities were determined.The results indicate that 8 combinations including Quanyouhuazhan,Huangliangyouyuehesimiao,Huiliangyouhuangsizhan,Huangliangyoulvyouzhan,Huangliangyouhuangsizhan,Huangliangyouwushansimiao,Longliangyouhuazhan and Huiliangyouyuehesimiao meet all the requirements:suitable growth periods,a yield increment>5%,grain quality and taste score>85,and milled rice appearance grade>2.Quanyouhuazhan and Longliangyouhuazhan passed varietal approval several years ago.Six combinations selected by the Hunan breeding station of Beidahuang Kenfeng Seed Industry Co.,Ltd.have gone through years of test for yield,grain quality and lodging resistance,their rice blast resistances also meet the requirements of production and application,so they can be popularized and planted in Changsha County after variety approval.