简介：种子背景率，收益部件和从异国情调的米饭germplasm的169就职的谷物质量特点从40在高温度下面被测试吗？

简介：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.

简介：由使用父母，Kunmingxiaobaigu，有从云南的冷忍耐的一个陆地赛跑变化，中国，和Towada，一个寒冷敏感的变化作为测试材料在日本，以及theirF_8和F_9RIL子孙繁殖了，在在在四不同高度(环境)下面的2002and2003的孕穗期的米饭的冷忍耐，并且在小穗状花小穗富饶和单个植物的特定的小穗状花小穗富饶(到在每圆锥花序的顶的三个主要分支的the5th小穗状花小穗的从3rd的九小穗状花小穗的小穗状花小穗富饶)之间的英国管关系被分析。数据从0.7364～0.9011与范围揭示了在小穗状花小穗富饶和特定的小穗状花小穗富饶之间的一种重要英国管关系。在冷压力环境下面，没有冷应力，然而，相关系数比那些高。在另一方面，panicleexsertion被相关到小穗状花小穗富饶和特定的小穗状花小穗富饶。而且，遗传分析建议特定的小穗状花小穗富饶能作为鉴定指示物代替小穗状花小穗富饶，当时圆锥花序使突出离子能在米饭在孕穗期被用作冷忍耐鉴定的部分指示物。

简介：DNAmarkersenabledtodeterminethechromosomallocationsofthetwoRfgenes(Rf3andRf4)inthewild-abortivecytoplasmicmalesterility(WA-CMS)system.Foursimplesequencerepeats(SSRs)RM171,RM258,RM315andRM443wereusedtodetecttheallelicstatuswithrespecttothefertilityrestorationgenes(Rf3andRf4)in300ricecultivarsorbreedinglines.Theresultsrevealedthatoutof300lines,90linesscreenedhadRf3,65lineshadRf4,and45lineshadRf3andRf4alleles.Furthermore,45linesselectedusingSSRmarkerswerematedwithaCMSline(IR58025A)toanalyzetheirrestoringability.OffspringofallthetestlinesexceptHHZ8-SAL9DT1-Y1,HHZ5-SAL9-Y3-1andIDSA77exhibitedhigherpollenandspikeletfertility(>80%〇),thusconfirmingtheybeartheRfalleles.ThehybridoffspringofARH12-6-1-1-B-3-1,IR32307-10-3-2-1andSahel329hadthehighestpollenfertility(97.390%,98.300%and97.100%,respectively)andspikeletfertility(95.10%,97.07%and96.10%,respectively).

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