摘要
Seventeenricevarietiesandhybridsofdifferenttypes(indica,japonica,javanica,indicahybrid,japonicahybridandinter-subspecifichybrid)wereevaluatedtodeterminetheeffectoftemperatureonpollenfertilityininter-subspecfichybrids.Thepollenfertilityofinter-subspecifichybridswasgreatlyreducedwhenaveragedailytemperaturedroppedto22.0-23.0℃atmeiosisstage,andtheextentofpollenfertilityreductionvariedgreatlywithrespecttodifferenthybrids.However,thepollenfertilityreductionofindicaandjaponicahybridsandconventionalvarietieswasnotobviousunderthesameregimeoftemperatureconditions.Whentheaveragedailytemperaturedroppedto20℃.thepollendevelopmentofconventionalvarietiesandhybridswasalsoaffected.Correlationanalysisrevealedthatthereexistedapositivecorrelationbetweenpollenfertilityandaveragedailytemperature.Asignificantdifference(P<0.01)wasalsofoundbetweenthetwocorrelationcoefficientsi.e.inter-subspecifichybridsandconventionalvarieties.Temperatureatmeiosisstageofpollenmothercellwasakeyfactorinpollendeveloping,andthepollenfertilityofinter-subspecifichybridswasmoresensitivetolowtemperaturethanthatoftraditionalvariety.
出版日期
2004年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
