Developing green super rice varieties with high nutrient use efficiency by phenotypic selection under varied nutrient conditions

作     者：Zilhas Ahmed Jewel Jauhar Ali Yunlong Pang Anumalla Mahender Bart Acero Jose Hernandez Jianlong Xu Zhikang Li 

作者机构：Rice Breeding PlatformInternational Rice Research Institute (IRRI)Los BanosLaguna 4031Philippines Institute of Crop SciencesChinese Academy of Agricultural ScienceBeijing 100081China Institute of Crop ScienceCollege of Agriculture and Food ScienceUniversity of the PhilippinesLos BanosLaguna 4031Philippines 

出 版 物：《The Crop Journal》 (作物学报（英文版）)

年 卷 期：2019年第7卷第3期

页      面：368-377页

核心收录：

学科分类：0710[理学-生物学] 09[农学] 0901[农学-作物学] 0902[农学-园艺学] 

基　　金：the Bill & Melinda Gates Foundation (BMGF) for providing a research grant to Z.L.for the Green Super Rice project under ID OPP1130530 the Department of Agriculture of the Philippines for providing funds to J.A.under the Next-Gen project 

主　　题：Nutrient use efficiency Grain yield Nitrogen Phosphorus Green super rice 

摘      要：The development of green super rice varieties with improved nutrient use efficiency(NuUE)is a vital target area to increase yield and make it more stable under rainfed *** the present study, we followed an early backcross(BC) breeding approach by using a highyielding and widely adapted Xian variety, Weed Tolerant Rice 1(WTR-1), as a recipient and a Geng variety, Hao-An-Nong(HAN), as a *** from the BC1F2 generation, the BC population went through one generation of selection under irrigated, low-input, and rainfed conditions, followed by four consecutive generations of screening and selection for high grain yield(GY) under six different nutrient conditions(NPK, 75 N,-N,-P,-NP, and-NPK), leading to the development of 230 BC1F6 introgression lines(ILs).These 230 ILs were evaluated under the same six nutrient conditions for 13 agro-morphological and grain yield component traits in comparison to four checks and *** trait variations were observed between the treatments and *** correlations were identified for GY with biomass, panicle length, flag-leaf area, flag-leaf width, filled grain number per panicle,1000-grain weight, and tiller number under-N,-P,-NP, and-NPK *** of 230 ILs,12 were identified as promising under two or more nutrient deficiency *** results demonstrated an efficient inter-subspecific BC breeding procedure with a first round of selection under rainfed-drought conditions, followed by four generations of progeny testing for yield performance under six nutrient *** promising ILs can be useful resources for molecular genetic dissection and understanding the physiological mechanisms of NuUE.