GENETIC EVALUATION FOR YIELD AND ITS COMPONENT TRAITS IN OKRA (Abellmoschus escullentus (L..) Moench)
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Date
2019-07-10
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CSKHPKV, Palampur
Abstract
Okrra ((Abellmoschus escullenttus ((L..)) Moench)) allso calllled as llady‟‟s ffiingerr orr bhiindii iis one off tthe mostt
common,, exporrtt orriientted and prriinciipall vegettablle crrops grrown allll tthe yearr rround iin tthe counttrry iinclludiing llow
and miid hiilllls off Hiimachall Prradesh.. Devellopmentt off hiigh yiielldiing and yellllow veiin mosaiic viirrus ((YVMV))
rresiisttantt varriiettiies iis tthe majjorr necessiitty iin tthiis crrop.. IIntterrspeciiffiic and iintterrvarriiettall hybrriidiizattiion ffollllowed by
sellecttiion have been adoptted tto devellop hiigh yiielldiing and YVMV rresiisttantt varriiettiies.. Howeverr,, a ffrrequentt
brreakdown off YVMV rresiisttance iin mostt off tthe rresiisttantt varriiettiies has ttaken pllace and tthiis needs iimmediiatte
attttenttiion.. Hence,, iidenttiiffiicattiion and devellopmentt off new iimprroved diisease rresiisttantt cullttiivarrs iis verry iimporrttantt
tto ffurrttherr boostt up tthe prroducttiion and prroducttiiviitty off tthe crrop.. Based on tthese consiiderrattiions,, tthe prresentt
iinvesttiigattiion was,, ttherrefforre,, underrttaken iin 30 diiverrse genottypes off okrra evalluatted iin Randomiized Compllette
Bllock Desiign wiitth tthrree rreplliicattiions att Pallampurr durriing summerr--rraiiny season,, 2018 tto assess tthe genettiic
parrametterrs off varriiabiilliitty and tto underrsttand tthe iintterr--rrellattiionshiips among horrttiiculltturrall ttrraiitts fforr marrkett and seed
crrop.. The anallysiis off varriiance rrevealled siigniiffiicantt diifffferrences among genottypes fforr allll quanttiittattiive and qualliitty
ttrraiitts allong wiitth diisease rreacttiion sttudiied iin botth marrkett and seed crrop.. The maxiimum pod yiielld was obserrved
iin genottype 9801 ffollllowed by Kashii Viibhuttii,, DPO--5,, Pallam Komall and Punjjab Suhawanii,, wherreas iin seed crrop
tthe genottypes DPO--5,, Kashii Sattdharrii,, Pallam Komall,, 9801 and Punjjab Suhawanii werre tthe hiighestt seed yiiellderr..
The esttiimattes off phenottypiic coeffffiiciientt off varriiattiion ((PCV)) and genottypiic coeffffiiciientt off varriiattiion ((GCV)) werre
hiigh fforr muciillage iin marrkett crrop,, whiille iin seed crrop,, iitt was hiigh fforr seed yiielld.. The PCV and GCV vallues fforr
ottherr ttrraiitts werre llow tto moderratte depiicttiing tthe prresence off substtanttiiall varriiabiilliitty.. Hiigh herriittabiilliitty couplled wiitth
hiigh genettiic advance was obserrved fforr rriidges perr pod,, muciillage and pod yiielld perr pllantt iin marrkett crrop.. IIn seed
crrop seed viigourr,, node att whiich tthe ffiirrstt pod sett and seed yiielld werre ffound tto have hiigh herriittabiilliitty couplled
wiitth hiigh genettiic advance,, rrevealliing tthe iimporrttance off addiittiive gene acttiion fforr tthese ttrraiitts iin botth marrkett and
seed crrop.. Hence,, tthese charractterrs coulld be iimprroved tthrrough diirrectt sellecttiion.. Low herriittabiilliitty associiatted wiitth
llow genettiic advance fforr days tto marrkettablle matturriitty and pod diiametterr iin tthe marrkett crrop,, whiille days tto 50 perr
centt ffllowerriing and days tto seed matturriitty iin tthe seed crrop werre iindiicattiive off non--addiittiive gene acttiion,, and
consequenttlly llow genettiic gaiin iis expectted ffrrom sellecttiion iin such a siittuattiion.. Among viisualllly obserrved
charractterrs,, grreen,, darrk grreen and yellllowiish grreen pod collourr att iimmatturre sttage,, downy tto slliighttlly rrough
pubescence and allmostt 5 rriidges perr pod werre rrecorrded iin tthe genottypes evalluatted.. Based upon corrrrellattiion and
patth--coeffffiiciientt anallysiis rrevealled tthatt tthe sellecttiion based on pods perr pllantt,, nodes perr pllantt,, durrattiion off
avaiillabiilliitty off ediiblle pods,, pllantt heiightt and averrage pod weiightt iin marrkett crrop,, wherreas iin seed crrop sellecttiion
based on seeds perr pod,, pllantt heiightt,, nodes perr pllantt and 100--seed weiightt woulld be ffrruiittffull and rrewarrdiing fforr
effffecttiive iimprrovementt off pod and seed yiielld,, rrespecttiivelly.. IIn marrkett crrop genottypes 9801,, Kashii Viibhuttii,,
DPO--5 and Punjjab Suhawanii werre hiighestt yiiellderr,, wherreas iin seed crrop tthe genottypes DPO--5,, Kashii Sattdharrii,,
9801 and Punjjab Suhawanii werre tthe hiighestt yiiellderr and werre superriiorr ffrrom check Punjjab--8 botth iin marrkett and
seed crrop.. Barrrriing DPO--5,, ottherr genottypes werre earrlly ffllowerriing ttypes fforr botth marrkett and seed crrop.. Allll hiigh
yiielldiing genottypes had grreen orr darrk grreen pods wiitth downy pubescence.. Exceptt Kashii Sattdharrii hiigh yiielldiing
genottypes werre rresiisttantt tto powderry miilldew botth iin marrkett and seed crrop underr ffiielld condiittiions.. 9801,, DPO--5
and Punjjab Suhawanii werre tthe genottypes whiich werre tthe mostt desiirrablle botth fforr marrkett and seed crrop.. Hence,,
tthese arre lliikelly tto perrfforrm betttterr iin Hiimachall Prradesh afftterr mullttii--location testing as these possess iinherrentt
abiilliitty tto hiigh yiielldiing allong wiitth powderry miilldew rresiisttance and superriiorr quality traits.
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