.

Correlation and association of characters in Vetiveria zizanioides (L.) from Kerala part of Peninsular India

Table 6. Factor analysis in Vetiveria zizanioides - characters associated

Factors

Characters associated

Tiller girth

Plant height , leaf length, leaf breadth, root length, fresh weight- shoot

III

Number of tillers, leaves per tiller , number of roots per tiller, dry weight- root

Fresh weight- root

Generallyȱitȱpropagatesȱbyȱproducingȱnewȱshootsȱatȱ experimentȱwasȱlaidȱoutȱinȱrandomizedȱblockȱdesignȱ

theȱjointsȱaboveȱtheȱsoilȱsurfaceȱandȱbyȱbranchingȱatȱ withȱthreeȱreplicationsȱandȱ12ȱplantsȱperȱreplication.ȱ

theȱjointsȱbelowȱsoilȱsurfaceȱthatȱhaveȱinflorescence.ȱ Observationsȱ onȱ twelveȱ growthȱ charactersȱ wereȱ

Theȱseedsȱareȱveryȱthinȱandȱhaveȱaȱshortȱdormancyȱ recordedȱforȱthreeȱconsecutiveȱseasonsȱstartingȱfromȱ

period.

theȱ firstȱ yearȱ andȱ analysed.ȱ Dataȱ onȱ Plantȱ heightȱ

Geneticȱ diversityȱ playsȱ anȱ importantȱ roleȱ inȱ cropȱ

(cm),ȱ Numberȱ ofȱ tillers,ȱ Tillerȱ girthȱ (cm),ȱ Leavesȱ

improvement,ȱbecauseȱtheȱsegregantsȱbetweenȱlinesȱ

perȱtiller,ȱLeafȱlengthȱ(cm),ȱLeafȱbreadthȱ(cm),ȱRootȱ

ofȱ diverseȱ originȱ generallyȱ displayȱ anȱ improvedȱ

lengthȱ(cm),ȱNumberȱofȱrootsȱperȱtiller,ȱFreshȱweightȱ

performanceȱ thanȱ thoseȱ betweenȱ closelyȱ relatedȱ

ofȱshootȱ(g),ȱFreshȱweightȱofȱrootȱ(g),ȱDryȱweightȱofȱ

parentalȱ genotypesȱ (Hariramȱ andȱ Appalaswamy,ȱ

shootȱ(g)ȱandȱDryȱweightȱofȱrootȱ(g)ȱwereȱusedȱforȱ

2014).ȱ Asȱ inȱ theȱ caseȱ ofȱ otherȱ crops,ȱ mostȱ ofȱ theȱ

theȱstudy.

agronomicȱcharactersȱareȱquantitativeȱinȱnatureȱinȱthisȱ

Statistical Analysis

speciesȱalso.ȱSuchȱcharactersȱshowȱinterrelationshipȱ

dueȱtoȱsharingȱofȱalleles.ȱPolygeneicȱcharactersȱshowȱ Correlationȱ ofȱ theȱ charactersȱ hasȱ beenȱ analysedȱ asȱ

associationȱbetweenȱthemȱandȱfactorȱanalysisȱisȱaȱveryȱ perȱ Rangaswamyȱ (1995)ȱ andȱ Msaakpaȱ andȱ Obasiȱ

efficientȱtoolȱusedȱtoȱfindȱoutȱcharacterȱassociationȱ (2014).ȱAssociationȱofȱagronomicȱcharactersȱhasȱbeenȱ

andȱ toȱ groupȱ theȱ variablesȱ inȱ toȱ differentȱ groupsȱ studiedȱ asȱ perȱ Sneathȱ andȱ Sokalȱ (1973)ȱ byȱ factorȱ

andȱalsoȱtoȱeffectȱdataȱreductionȱbyȱidentifyingȱtheȱ analysisȱusingȱtheȱstatisticalȱsoftwareȱSTATISTICA.

leadȱ variablesȱ ofȱ eachȱ groupȱ (Hrideekȱ et al .ȱ 2008;ȱ

Umamaheswariȱ andȱ Mohanan,ȱ 2011).ȱ Presently,ȱ

Results and Discussion

interrelationshipȱ andȱ associationȱ ofȱ charactersȱ inȱ Twelveȱ morphometricȱ charactersȱ thatȱ areȱ

Vetiveria zizanioides ȱ haveȱ beenȱ analyzedȱ inȱ theȱ caseȱ importantȱ inȱ theȱ studyȱ ofȱ growthȱ andȱ yieldȱ

ofȱ theȱ morphometricȱ charactersȱ forȱ theȱ purpose.

behaviourȱ ofȱ Vetiveria zizanioides ȱ wereȱ recordedȱ

(Tableȱ1)ȱandȱanalysedȱpresentlyȱsoȱasȱtoȱassessȱtheȱ

Materials and Methods

interrelationshipȱ andȱ associationȱ ofȱ theȱ characters.ȱ

Theȱpresentȱexperimentȱwasȱdesignedȱtoȱanalyzeȱtheȱ Studyȱofȱinterrelationshipȱofȱcharactersȱbyȱcorrelationȱ

variabilityȱ amongȱ differentȱ accessionsȱ ofȱ Vetiveria

analysisȱ isȱ anȱ importantȱ toolȱ usedȱ toȱ identifyȱ theȱ

zizanioides ȱ (L.).ȱ Theȱ experimentȱ wasȱ carriedȱ outȱ inȱ variablesȱ whichȱ showȱ maximumȱ relationshipȱ

Keralaȱ Forestȱ Researchȱ Institute,ȱ Peechi,ȱ Thrissurȱ withȱ othersȱ inȱ theȱ caseȱ ofȱ polygenicȱ characters.ȱ

Kerala,ȱIndiaȱduringȱ2011-ȱ2013.ȱTheȱstudyȱareaȱwasȱ Correlationȱ analysisȱ wasȱ carriedȱ outȱ presentlyȱ inȱ

locatedȱatȱanȱaltitudeȱofȱ80ȱmȱaboveȱMSLȱatȱ10 0 31’ȱ theȱ caseȱ ofȱ 12ȱ morphometricȱ charactersȱ inȱ vetiverȱ

51.4”ȱ Nȱ latitudeȱ andȱ 07 0 ȱ 20’ȱ 47.58”ȱ Eȱ longitudeȱ soȱ asȱ toȱ studyȱ theȱ interrelationshipȱ betweenȱ themȱ

enjoyingȱhumidȱtropicalȱclimate.ȱFourteenȱaccessionsȱ (Tablesȱ2ȱandȱ3).ȱAmongȱtheȱcharactersȱplantȱheightȱ

ofȱ V. zizanioides ȱ collectedȱ fromȱ differentȱ partsȱ ofȱ showedȱ significantȱ positiveȱ correlationȱ withȱ twoȱ

Keralaȱwereȱraisedȱandȱobservedȱforȱtheȱstudy.ȱTheȱ charactersȱ (leafȱ lengthȱ andȱ freshȱ weightȱ ofȱ shoot).ȱ

Leafȱ lengthȱ showedȱ significantȱ positiveȱ correlationȱ

241