Yield characteristics of japonicalindica hybrids rice in the middle and lower reaches of the Yangtze River in China  

作　　者：XU Dong ZHU Ying CHEN Zhi-feng HAN Chao HU Lei QIU Shi WU Pei LIU Guo-dong WEI Hai-yan ZHANG Hong-cheng 

机构地区：[1]Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Agricultural College,Yangzhou University,Yangzhou 225009,P.R.China

出　　处：《Journal of Integrative Agriculture》2020年第10期2394-2406,共13页农业科学学报（英文版）

基　　金：Grants from the National Key R&D Program of China(2016YFD0300503);the earmarked fund for China Agriculture Research System(CARS-01-27);the National Natural Science Foundation of China(31871841);the Key Research Program of Jiangsu Province,China(BE2016344,BE2018355);the earmarked fund for Jiangsu Agricultural Industry Technology System,China(JATS[2018]298);the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions,China.

摘　　要：Although a lot of researches have been done on yield characteristics of japonica/indica hybrid rice,there is itte information on differences of yield characteristics between different types of hybrid.To determine common characteristics of japonical indica hybrid rice(JIHR)and identify the differences between different types of JIHR,the present study assessed yield characteristics,such as panicle trait,leaf area index(LAI),above-ground biomass accumulation,and nitrogen absorption and uilization,among three types of cultivar of JIHR.In our field experiments,three types of JIHR,e.g.,Yongyou,Chunyou and Jiayouzhongke,were divided,and each of them has two cultivars,which were used as materials,meanwhile,using conventional japonica rice(CJR)Wuyingjing 31 and Sujing 9 were as controls.The results showed that the mean yield of those JIHR was above 12 t ha^-1 in 2017 and 2018,and was 31.9 and 32.2%,respectively higher than that of CJR in the two years.Spikelet number per panicle of JIHR resulted in high yield.Higher yield of JIHR was likely contributed to greater panicle number and more spikelets per panicle.Higher yielding JIHR showed stronger tllering capacity,larger LAI and above-ground biomass accumulation from jointing to heading stages,which likely contributed to the higher number of spikelets per panicle.The long duration from heading to maturity stages allowed more nitrogen accumulation of higher yielding JIHR.

关 键 词：japonica/indica hybrid rice YIELD agronomic trait nitrogen accumulation 

分 类 号：S511[农业科学—作物学]