简介：ResearchonhybridriceinJiangsuProvince,Chinabeganin1970.Greatprogresshasbeenmadesincethen,whichcanbedividedintothreestagesaccordingtothedevelopmentofhybridricebreedingandproductioninJiangsuProvince.Thefirststagewasbeginningstagefrom1970to1980,whenprogresswasmainlymadeincytoplasmicmalesterilelinebreeding.Thesecondstagecouldbedescribedasdevelopingstage,from1980to1995,whenindicahybridricewasrapidlypopularized,andjaponicahybridricebecamepopularlater.From1996,hybridricebreedinginJiangsuProvinceenteredthethirdstage,whenbothindicaandjaponicahybridricebreedinginthethree-linesystemorintersubspecifichybridricebreedinginthetwo-linesystemmadeagreatbreakthroughwiththesuccessfulbreedingofthehybridsTeyou559,9You138andLiangyoupeijiu.ThedevelopingtrendofhybridricebreedinginJiangsuProvinceisalsodiscussed.

简介：PyriculariaoryzaeanamorphofMagnaportheoryzaeisoneofthemostnotoriousfungalpathogenscausingsevereeconomiclossinriceproductionworldwide.Variousmethods,viz.cultural,biologicalandmolecularapproaches,areutilizedtocounteractthispathogen.Moreover,sometolerantorresistantricevarietieshavebeendevelopedwiththehelpofbreedingprogrammes.Isolationandmolecularcharacterizationofdifferentblastresistancegenesnowopenthegatefornewpossibilitiestoelucidatetheactualallelicvariantsofthesegenesviavariousmolecularbreedingandtransgenicapproaches.However,thebehavioralpatternofthisfungusbreakupstheresistancebarriersintheresistantortolerantricevarieties.Thishost-pathogenbarrierwillbepossiblycounteredinfutureresearchbycomparativegenomicsdatafromavailablegenomesequencedataofriceandM.oryzaefordurableresistance.Presentreviewemphasizedfascinatingrecentupdates,newmolecularbreedingapproaches,transgenicandgenomicsapproaches(i.e.miRNAandgenomeediting)forthemanagementofblastdiseaseinrice.Theupdatedinformationwillbehelpfulforthedurable,resistancebreedingprogrammeinriceagainstblastpathogen.

简介：温室实验被进行在在正常、含硒的土壤上种的二个米饭变化(PR116和PusaBasmati1121)调查硒累积和它的抗氧化剂反应。植物生长在早发展的阶段被减少，flowering被10d的一个时期在含硒的土壤上推迟。3–20和13–14增加的硒累积在叶子合拢，在从PusaBasmati1121和PR116变化的谷物的18和3褶层分别地。在从在含硒的土壤上种的大米植物的叶子的硒累积导致了叶绿素内容，氢过氧化物，脯氨酸，免费氨基酸，全部的酚和丹宁内容的重要增加。而过氧化氢酶活动显示出一个反向的趋势，在叶子的类脂化合物peroxidation层次和peroxidase活动增加了。硒累积减少了，这被结束在在庄稼期间，开发而是这些种的米饭的干燥的事内容能由在他们的防卫系统导致改变与硒毒性作斗争。

简介：Riceleaffolder,Cnaphalocrocismedinalis,isoneofthemajorfoliagefeedersfoundinthericegrowingregionsinIndia.Whenthecropwasatmaturity,numerousadultsofriceleaffolderwerefoundinthericefieldsthoughthelarvalpopulationgraduallydecreased,andnoeggswerefoundonriceleaves.ThepopulationcharacteristicsofC.medinaliswereassessedbasedonthephysiologicalagestatusofadultsatdifferentcropgrowthstages.Basedoneggdevelopmentwithinovarioles,ovarioleappearance,numberandcolouroffatbodies,andcharacteristicsofbursacopulatrix,physiologicalagestatusoftheadultswasdescribed,whichservedasabasisforthedeterminationofagecomposition.C.medinalisadultswerefoundduringthefirstweekofAugustonriceplants,ofwhich44%wereinAge0withimmatureovaries,indicatingimmigrants.However,28%adultseachwereatAges1–2withdevelopingovaries,indicatinglocalbreedingpopulation.Thecarryoverandoff-seasonsurvivalofC.medinaliswerealsostudiedtodeterminethecontributionofthealternativehostsinthepopulationgrowththathelpedindevisingefficientmanagementstrategies.RicewasthemostpreferredhostfollowedbyTriticumaestivum,EchinochloacrusgulliandBrachiariaplantaginea.VariousroutesofthecarryoverofC.medinalisfromseasontoseasonwerediscussed.