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1、中国水稻科学(ChinJRiceSci),２０１５,２９(３):２９１－２９８http://www．ricesci．cnDOI:１０．３９６９/ji．ssn．１００１Ｇ７２１６．２０１５．０３．００８２９１甬优系列杂交稻组合开花期耐冷性评价曾研华１,２,＃张玉屏２,＃王亚梁２向镜２陈惠哲２朱德峰２,∗(１南京农业大学农学院,南京２１００９５;２中国水稻研究所水稻生物学国家重点实验室,杭州３１１４００;＃共同第一作者;∗通讯联系人,EＧmail:cnrice＠qq．com)EvaluationofChillingResistanceinYongyouSeriesofH
2、ybridRiceatFloweringStageZENGYanＧhua１,２,＃,ZHANGYuＧping２,＃,WANGYaＧliang２,XIANGJing２,CHENHuiＧzhe２,ZHUDeＧfeng２,∗(１CollegeofAgronomy,NanjingAgriculturalUniversity,Nanjing２１００９５,China;２StateKeyLaboratoryofRiceBiology,ChinaNationalRiceResearchInstitute,Hangzhou３１０００６,China;＃Thisauthorcontrib
3、utedequallytothework;∗Correspondingauthor,EＧmail:cnrice＠qqc．om)ZENGYanhua,ZHANGYuping,WANGYaliang,etal．EvaluationofchillingresistanceinYongyouseriesofhybridriceatfloweringstage．ChinJRiceSci,２０１５,２９(３):２９１Ｇ２９８．Abstract:Yongyouseries(indicaＧjaponicahybridrice)andQianyou２(indicahybridrice
4、),Zhejing８８(inbredjaponicarice)weresubjectedtolowtemperaturestress(１７℃)andnormaltemperaturetreatment(２５℃)for４daysand７daysinphytotrontoinvestigatethegrainfillingcharacteristicsduringfloweringstagewiththeambienttemperatureascontrol．Theresultsshowedthatseedsettingrateandgrainyieldperpanic
5、leofYongyouseriesweredecreasedsignificantlyunderlowtemperaturetreatment,especiallyunderthe７Ｇdaychillingstress．Basedonthecoldresistanceindex,Yongyou５３８,Zhejing８８,Yongyou１０,Yongyou６,Yongyou１５werechillingtolerantlines,Yongyou８,Yongyou１２,Yongyou９,Yongyou１７werechillingsensitiveones,andtheot
6、herswereintermediatetype．Therewasnosignificantdifferenceintheratioofindicaandjaponicabackgroundbetweenchillingtolerantlinesandchillingsensitiveones．Thecorrelationanalysisindicatedthatunder７Ｇdayofchillingstress,therelativecoldsensitivityindexwassignificantlycorrelatedwithseedsettingrate
7、andgrainsterilityrateatthe０．０１probabilitylevelwiththecorrelationcoefficientsof－０．９５５２and０?９６０２,respectively．Keywords:indicaＧjaponicahybridrice;Yongyouseries;chillingtolerance;indicaＧjaponicaindex曾研华,张玉屏,王亚梁,等．甬优系列杂交稻组合开花期耐冷性评价．中国水稻科学,２０１５,２９(３):２９１Ｇ２９８．摘要:以籼粳杂交稻甬优系列及杂交籼稻钱优２号和常规粳稻浙粳８８
