全生育期增温胁迫鉴定评价粳稻种质资源耐热性

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关键词：粳稻；种质资源；全生育期增温胁迫；产量；外观品质；耐热性

中图分类号： S511.2AA+2 文献标识码：A

文章编号：0439-8114（2025）08-0035-07

DOI：10.14088/j.cnki.issn0439-8114.2025.08.006

Identification and evaluation of thermotolerance in japonica rice germplasm resources under whole growth period warming stress

LE Si，TUHang，HUJia-xiao，LIUJin，ZHOU Hui-ying，MENG Bing-xin，YULi-qin，LIMao-mao （RicResearchsiuteJigiadlualcatoalEgisechnteoicacan/Jiag Center of Crop Germplasm Resources，Nanchang 33020o，China）

Abstract：Inorder to explore theresponseof yieldandappearancequalityof Japonicaricegermplasmresources totemperature increaseandscreenouthermotolerancegermplasmresourcesofJaponicarice，365coregermplasmsofJaponicaricefromtheresearch intheearlystagewereusedasexperimentalmaterials，andtheconventionalfieldwasusedasthecontrol.Theartfcial greeouse wasusedtoincreasethetmperatureduringtheholegrowthperiod，andtheplantheight，yieldcompoentsandappearancequality traitsofJaponicaricewere measured.Theresultsshowed that，compared withthecontrol，thegrowthanddevelopmentprocessof Ja ponicaricewasacelerated，thegrowth periodwassignificantlyshortened，andthetilernumberwassignificantlyreducedunderthe wholegrowth peridwarmingstressAtmaturity，underthewholegrowthperiodwarmingstress，theefectivepanicleumberteprimarybrachnumber，seedsetingrateandthousand-grainweightdecreasedsignificantlyorextremelysignificantly，thegrainwidth andgrainthicknesincreased，thelength-widthratiodecreased，andthegrainwasshortandround.Comparedwiththecontrol，the appearancequalitydeteriorated，thechalkyricerateandchalkinessdegreeincreasedsignificantly，andthegrain transparencydecreasedsignificantlyunderthewholegrowthperiodwarmingstres.Inadition，itwasalsofoundthatdiferentyieldfactorsadifer entresponses twarmingstres，andthetermotoleranceofdifrentJaponicaricevarietiesasalsosignificantlydiferent.enstrong thermotoleranceJaponicaricegerplasmswithexcellntcomprehensiveritsereidentifidandsreenedbyusingthekeyerotoleranceresponse indexessuchasefectivepanicle number，sedsetingrate，chalkyricerateandchalkinessdegree，aswells the comprehensive heat tolerance coefficient.

Keywords：japonicarice;germplasmresoure;waringstressduringolegrowthperiod;yield;appearancequalitytherotolerance

受气候变化、工业排放和人类活动的影响，全球气温逐步上升[。（剩余8022字）