简介：Twonewlybredhybridricecombinations,superhigh-yieldingLiangyoupeijiu(Pei'ai64S×9311)andPei'ai64S/E32(Pei'ai64S×E32)wereusedtoinvestigatethephotosyntheticcharacteristicsunderhightemperatureincomparisonwithhybridriceShangyou63.Hightemperaturecausedadecreasedphotosyntheticefficiencyandaggravatedphotoinhibition.TheoptimumtemperatureforphotosyntheticelectrontransportationandphotosyntheticCO2fixationwereabout28℃and35-40℃respectively.Linearelectrontransportationismoresensitivetohightemperaturethanthephotochemicalprocess.Themechanismofhightemperatureadaptationwaspossiblyasfollows:superhigh-yieldingricehasquicklyincreasingcarotenoid,whichactedasamorefavorableantioxidantsystemtoreducetheactiveoxygenproductionandavoiddamagetothephotosynthesissystem;superhigh-yieldingricehasahigherefficiencyofxanthophyllscycletodissipateexcessheatenergy;superhigh-yieldingricehasamorestablephotosyntheticfunction,higherphotosyntheticefficiencyandmoreheatstableproteincontent.

简介：布朗planthopper(Nilaparvatalugens圣?l)大多数损坏害虫之一在米饭正在引起hopper灼伤，并且从而减少生产率并且另外产品的质量。控制这个害虫的有效管理策略是到本地米饭栽培变种的理想的基因的鉴定和转移。为开发抵抗栽培变种的最重要的途径是标记的鉴定，它能在更持久的抵抗遗传型的帮助标记的选择帮助。易受影响的父母IR50和抵抗父母Ptb33，和他们的F2人口是为有随机的放大多态的DNA的抵抗基因的鉴定的使用的inbulkedsegregant分析标记(RAPD)教材。教材OPC7和OPAG14证明主导、易受影响的特定的banding模式那么叫了co主导的标记。而且，OPC7697和OPAG14680给抵抗特定的乐队看了并且因此在联合分阶段执行，而OPC7846和OPAG14650给易受影响的特定的genotypic乐队看了inbulkedsegregant分析。因此，联合阶段标记，OPC7697和OPAG14680，被认为在在庄稼改进的米饭遗传型的帮助标记的选择更有用。