Modelling Causes of Temporal Genotype-By-Environment Interaction in Oil Palm Bunch Yield in Nigeria.pdfVIP

Modelling Causes of Temporal Genotype-By-Environment Interaction in Oil Palm Bunch Yield in Nigeria.pdf

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Modelling Causes of Temporal Genotype-By-Environment Interaction in Oil Palm Bunch Yield in Nigeria.pdf

JournalofAgriculturalScienceandTechnologyB 1(2011)241-250 Earliertitle:JournalofAgriculturalScienceandTechnology ISSN 1939.1250 , №eO~| … … 辩鞲 ng ausesofTemporal C B Y--EnvironmentInteractioninOilPalm Bunch pe-- Nigeria M .N.Okoye C.O.Okwuagwu M .I.Uguru andK.P.Baiyeri , , . PlantBreedingDivision,NigerianInstitutefo,OilPalmResearch~IFOR),P.M.B1030300001,BeninCity,EdoState.Nigeria 2.DepartmentOfCropScience,FaculytofAgriculture,UniversiytofNigeria,Nsukka,Nigeria Received:March22,2010/Published:June20,20l1 Abstract:Theobjectivesofthisresearchweretounderstandpatternoftemporal(yeartoyear)stabilityinoilpalmgenotypesandthen identifyweathervariable(s1associatedwithtemporalstabiliyt.StabilityanalysiswasperformedusingtheGGEbiplotmethod.Thebest genotypeinoneyearwasnotsamealwaysintheotheryearduetochangesintheweatherconditionsovertheyears.Testenvironment evaluationrevealedthattheyear2000fY00)wasthebestrepresentativeoftheoverallenvironmentsandmostpowerfu1todiscriminate genotypeswithsuperiormeanyieldandtemporalstabiliyt.Therelationshipoftheclimaticfactorsonthebasisoftheirioint contributiontothedevelopmentofspecifictraitvariedfrom thepatternobservedwhentheirrolesonthesametraitswerejndividually assessed.Maximum relativehumidity.sunshineandrainfal1couldhelpexplaintheyieldfluctuationduetotheircontributiontothe overallyield variation.However.genotypesG10 andG2 which exhibited high m ean performance and stability forBN wouldbe bcneficialtotheoilpalm growersinensuringsteadycashflow from regulra bunchyieldproduction. Keywords:Elae~guineensisJacq,GGEbiplotanalysis,genoytpexyearinteraction,climaticfactors,principalcomponent. 1.IntrOducti0n

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