分子标记辅助选育旱稻新品种‘中科西陆2号'  

Breeding of New Upland Rice Variety‘Zhongkexilu2'by Molecular Markerassisted Selection

作　　者：唐力琼[1] 王效宁[1] 王新华 霍兴 唐清杰[1] 徐靖[1] 朱红林[1] 徐鹏[3] 林延慧 Tang Liqiong;Wang Xiaoning;Wang Xinhua;Huo Xing;Tang Qingjie;Xu Jing;Zhu Honglin;Xu Peng;LinYanhui(Hainan Scientific Research Station of Crop Gene Resource&Germplasm Enhancement,Ministry of Agriculture,Hainan Key Laboratory of Crop Ge­netics and Breeding,Institute of Food Crops,Hainan Academy of Agricultural Sciences,Haikou,571100;Guangdong Provincial Key Laboratory of New Technology in Rice Breeding,Rice Research Institute,Guangdong Academy of Agricultural Sciences,Guangzhou,510640;Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Xishuangbanna,666303)

机构地区：[1]海南省农业科学院粮食作物研究所,海南省农作物遗传育种重点实验室,农业部作物基因资源与种质创制海南科学观测实验站,海口571100 [2]广东省农业科学院水稻研究所,广东省水稻育种新技术重点实验室,广州510640 [3]中国科学院西双版纳热带植物园,西双版纳666303

出　　处：《分子植物育种》2020年第24期8147-8154,共8页Molecular Plant Breeding

基　　金：国家重点研发计划“七大农作物育种”重点专项(2016YFD0101102,2017YFD0100100);现代农业产业技术体系建设专项(CARS-01-89)共同资助

摘　　要：为培育出适宜云南和海南等地区种植的高产、广适旱稻新品种,本研究以水稻品种‘明恢63’与旱稻品种‘陆引46’为亲本进行杂交和回交,通过分子标记辅助选择技术将陆生适应性QTLs导入,结合系谱法成功培育出感温型旱稻新品种‘中科西陆2号’。该品种在海南参加了3个点的两年评比试验,平均每公顷产量4 914 kg,比‘云陆201’增产25.5%,表明其具有较强的增产潜力。‘中科西陆2号’株型适中,穗部性状优良,株高105 cm,穗长22 cm,单株有效穗7个,穗粒数144粒,结实率89.2%,千粒重24.1 g。对‘中科西陆2号’进行抗旱性鉴定,结果显示:‘中科西陆2号’抗旱性与陆稻亲本‘陆引46’基本一致,显著强于水稻亲本‘明恢63’。‘中科西陆2号’于2019年通过了海南省品种审定委员会审定(琼审稻2018033)。本研究通过分子标记辅助选择的方法将陆生适应性QTLs导入,高效地选育出高产抗旱新品种,对促进云南和海南等地旱稻品种更新换代和对旱稻产业发展具有重要意义。In order to cultivate new upland rice varieties with high yield and wide adaptability, suitable for planting in Yunnan, Hainan and other tropical and subtropical areas, a new temperature sensitive upland rice variety ’Zhongkexilu 2’ was cultivated by hybridization and backcrossing between rice variety ’Minhui 63’ and upland rice variety ’Luyin46’. The upland adaptive QTLs were introduced through the molecular marker assisted selection technology and pedigree method. The variety participated in evaluation trial at 3 sites in two years in Hainan. The average yield of multi-point regional trial in two years were 4 914 kg/hm^2, which increased by more than 25.5%compared with the variety ’Yunlu 201’, indicating that it has a strong potential for increasing production. The plant height was 105 cm, with panicle length of 22 cm. Effective panicles number per plant were 7, and grain number per panicle was 144. Seed setting rate was 89.2%, and the thousand grain weight was 24.1 g, showing the moderate plant type and panicle traits. The drought resistance of ’Zhongkexilu2’ was identified. The result showed that its drought resistance was basically the same as that of the upland parent ’Luyin 46’, and it was significantly stronger than that of the parent ’Minghui 63’. It was approved by Hainan Variety Certification Committee in 2019(Qiongshen Rice 2018033). New varieties with high yield and drought resistant were cultivated through the molecular marker assisted selection technology and pedigree method, which was of great significance to promote the regeneration of upland rice varieties and the development of upland rice industry.

关 键 词：‘中科西陆2号’ 旱稻 分子标记辅助选择 系谱法 

分 类 号：S511.6[农业科学—作物学]