Analysis of Heterosis on Morphological and Qualitative Traits in Tomato ( Solanum Lycopersicon Mill) for Salinity Tolerance.
theseȱ Bilahi-2ȱ xȱ H-86ȱ andȱ Himlataȱ xȱ H-86ȱ wereȱ Itȱ is,ȱ therefore,ȱ suggestedȱ thatȱ differentȱ setȱ ofȱ eliteȱ
foundȱ asȱ twoȱ bestȱ heteroticȱ combinationȱ forȱ totalȱ hybridsȱforȱdifferentȱenvironmentȱconditionsȱshouldȱ
yieldȱinȱbothȱtheȱenvironmentsȱwhenȱcomparedȱonȱ beȱevaluatedȱfurtherȱforȱtheȱproperȱidentificationȱofȱ
theȱ basisȱ ofȱ per se ȱ performance,ȱ standardȱ heterosisȱ environmentalȱspecificȱhybrids.ȱTheȱbestȱfiveȱcrossesȱ
andȱheterobeltiosisȱtogether.ȱTheseȱcrossesȱmayȱbeȱ selectedȱonȱtheȱbasisȱofȱ per se performance,ȱstandardȱ
treatedȱ asȱ valuableȱ breedingȱ materialsȱ orȱ hybridȱ heterosisȱheterobeltiosisȱandȱscaȱeffectsȱforȱdifferentȱ
varietiesȱ afterȱ confirmationȱ ofȱ resultsȱ withȱ furtherȱ charactersȱ inȱ twoȱ environmentsȱ areȱ presentedȱ inȱ
testing.
Tableȱ1.ȱTheȱcrossȱcombinationsȱselectedȱonȱtheȱbasisȱ
Totalȱ yieldȱ plant -1 ȱ beingȱ aȱ complexȱ trait,ȱ isȱ aȱ
ofȱ meanȱ performanceȱ andȱ standardȱ heterosisȱ wereȱ
multiplicativeȱ productȱ ofȱ severalȱ basicȱ componentȱ
usuallyȱcommonȱforȱmostȱofȱtheȱcharactersȱinȱeachȱ
traitsȱ ofȱ yield.ȱ Theȱ improvementȱ inȱ heterosisȱ forȱ
environment.ȱHowever,ȱtheȱhybridsȱselectedȱonȱtheȱ
yieldȱ componentȱ mayȱ notȱ necessarilyȱ beȱ reflectedȱ
basisȱofȱheterobeltiosisȱandȱstandardȱheterosisȱwereȱ
inȱincreasedȱyield.ȱInȱotherȱhand,ȱtheȱincreasedȱfruitȱ
notȱ alwaysȱ common.ȱ Theȱ aboveȱ observationsȱ areȱ
yieldȱ willȱ definitelyȱ becauseȱ ofȱ increaseȱ inȱ oneȱ orȱ
logical,ȱ asȱ crossesȱ withȱ higherȱ meanȱ performanceȱ
moreȱ componentȱ traits.ȱ Theȱ majorȱ componentsȱ ofȱ
wouldȱ obviouslyȱ exceedȱ theȱ standardȱ parentȱ
yieldȱinȱtomatoȱareȱaverageȱfruitȱweight,ȱlengthȱofȱ
byȱ greaterȱ marginȱ thanȱ thoseȱ withȱ lowȱ meanȱ
fruit,ȱdiameterȱofȱfruitȱandȱnumberȱofȱfruitsȱplant -1 .ȱ
performance.ȱInȱcaseȱofȱheterobeltiosisȱtheȱestimatesȱ
Inȱtheȱpresentȱstudy,ȱheterosisȱoverȱstandardȱvarietyȱ
resultedȱfromȱF 1 –BPȱandȱdependȱmoreȱorȱlessȱonȱtheȱ
wasȱ toȱ theȱ extentȱ ofȱ 126.87ȱ perȱ centȱ (ECȱ 2291-2ȱ xȱ
meanȱofȱbetterȱparentȱinȱquestion.
H-24)ȱandȱ85.11ȱperȱcentȱ(MMȱxȱH-88)ȱforȱnumberȱofȱ Theȱ mostȱ worthyȱ commonȱ crossesȱ selectedȱ onȱ theȱ
fruitsȱplant -1 ȱinȱE 1ȱ andȱE 2 ;ȱ58.11ȱperȱcentȱ(MMȱxȱH-86)ȱ basisȱ ofȱ per se ȱ performance,ȱ heterobeltiosisȱ andȱ
andȱ119.17ȱperȱcentȱ(KS-60ȱxȱH-88)ȱforȱaverageȱfruitȱ standardȱ heterosisȱ forȱ differentȱ traitsȱ inȱ E 1 ȱ andȱ E 2 ,ȱ
weightȱinȱE 1 ȱandȱE 2 ;ȱ23.48ȱperȱcentȱ(MMȱxȱH-86)ȱandȱ environmentsȱ wereȱ Bilahi-2ȱ xȱ H-86ȱ andȱ Himlataȱ
24.45ȱperȱcentȱ(Bilahiȱ2ȱxȱH-24)ȱforȱlengthȱofȱfruitsȱinȱ xȱH-86ȱforȱtotalȱyieldȱinȱbothȱenvironments;ȱMMȱxȱ
E 1 ȱandȱE 2 ȱandȱ38.27ȱperȱcentȱ(HimlataȱxȱH-88)ȱandȱ H-88ȱandȱKS-60ȱxȱH-24ȱforȱnumberȱofȱfruitsȱplant -1 ȱinȱ
57.71ȱperȱcentȱ(HimlataȱxȱH-88)ȱforȱdiameterȱofȱfruitȱ E 2 ;ȱMMȱxȱH-86ȱandȱMMȱxȱH-88ȱinȱE 1 ȱandȱEC168282ȱxȱ
inȱE 1 ȱandȱE 2 ,ȱrespectively.ȱWhileȱhighestȱmagnitudeȱ H-24ȱinȱE 2 ȱforȱlengthȱofȱfruits;ȱHimlataȱxȱH-88ȱinȱbothȱ
ofȱheterobeltiosisȱwasȱrecordedȱasȱ23.85ȱperȱcentȱ(ECȱ experimentsȱandȱNDT-2ȱxȱH-88ȱinȱE 2 ȱforȱdiameterȱofȱ
2291-2ȱxȱH-24)ȱandȱ14.74ȱperȱcentȱ(MMȱxȱH-86)ȱforȱ fruitsȱandȱHimlataȱxȱH-86ȱinȱE 1 ȱandȱNDT-2ȱxȱH-86ȱinȱ
numberȱofȱfruitsȱplant -1 ;ȱ43.12ȱperȱcentȱ(ECȱ168282ȱ E 2 ȱforȱearlyȱyieldȱperȱplant.ȱHowever,ȱforȱagronomicalȱ
xȱ H-24)ȱ andȱ 79.47ȱ perȱ centȱ (ECȱ 6148ȱ xȱ H-24)ȱ forȱ traits,ȱBilahi-2ȱxȱH-86ȱinȱbothȱenvironmentsȱforȱplantȱ
averageȱ fruitȱ weight;ȱ 17.50ȱ perȱ centȱ (ECȱ 168282ȱ heightȱandȱnumberȱofȱprimaryȱbranchesȱplant -1 ȱwereȱ
xȱH-24)ȱandȱ19.05ȱperȱcentȱ(ECȱ168282ȱxȱH-24)ȱforȱ foundȱtoȱbeȱmostȱpromisingȱhybrids.
lengthȱ ofȱ fruit;ȱ 36.59ȱ andȱ 49.86ȱ perȱ centȱ (Himlataȱ
Theȱcrossȱcombinationsȱidentifiedȱasȱmostȱpromisingȱ
xȱ H-88)ȱ forȱ diameterȱ ofȱ fruitsȱ underȱ E 1 ȱ andȱ E 2 ,ȱ
forȱ theȱ charactersȱ importantȱ toȱ processingȱ andȱ
environmentsȱrespectively.ȱTheȱextentȱofȱheterosis,ȱ
qualityȱ pointȱ ofȱ view,ȱ wereȱ MMȱ xȱ H-88ȱ inȱ bothȱ
numberȱandȱidentityȱofȱcrossesȱexhibitingȱdesirableȱ
environmentsȱ forȱ totalȱ solubleȱ solids;ȱ ECȱ 2291-2ȱ xȱ
standardȱ andȱ betterȱ parentȱ heterosisȱ forȱ differentȱ
H-88ȱinȱbothȱenvironmentsȱforȱAscorbicȱacidȱcontentȱ
componentȱtraitsȱexpressedȱconsiderableȱdifferencesȱ
andȱ ECȱ 7343ȱ xȱ H-24ȱ inȱ E ȱ andȱ Bilahi-2ȱ xȱ H-88ȱ inȱ
1
underȱdifferentȱenvironment.ȱTheȱrankingȱofȱcrossesȱ
E ȱ forȱ pericarpȱ thickness.ȱ However,ȱ noneȱ ofȱ theȱ
2
inȱtheȱtwoȱenvironmentsȱwereȱalsoȱfoundȱdrasticallyȱ
crossesȱwereȱcommonȱforȱtitrableȱacidityȱinȱbothȱtheȱ
differentȱ forȱ severalȱ characters.ȱ Thisȱ indicatedȱ
environmentsȱinȱrelationȱtoȱaboveȱthreeȱparametersȱ
thatȱ theȱ genotypeȱ xȱ environmentalȱ interactionsȱ
i.e.ȱ per se ȱ performance,ȱ standardȱ heterosisȱ andȱ
playedȱanȱ importantȱ roleȱ inȱ exhibitionȱ ofȱ heteroticȱ
heterobeltiosis.
responseȱinȱF 1 ’sȱforȱdifferentȱcharactersȱunderȱstudy.ȱ
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