摘要
A2×2factorialcrossbetweentwopopulationsofPacificabaloneHaliotisdiscushannaiIno,collectedseparatelyfromDalian(D)inChinaandMiyagi(M)inJapan,wasconductedtocompareperformancesinfertilizationrate,hatchingrate,metamorphosisrateandgrowthatdays20,43,160and330betweenpurebreds(DDandMM)andcrossbreds(DMandMD)andinvestigatethemagnitudeofheterobeltiosis(betterparent)andheterosis(mid-parent).HeterobeltiosisandheterosisforallthetraitsanalyzedwereevidentlydifferentbetweencrossbredsDMandMD.HeterobeltiosisinthecrossbredDMvariedamongtraits,withvaluesof2.5%forthefertilizationrate,2.2%forthehatchingrate,-1.9%forthemetamorphosisrateand7.4%forthegrowthattheday330.ThecrossbredDMdisplayedpositiveheteroticvaluesforfertilizationrate(5.4%),hatchingrate(7.4%),metamorphosisrate(7.6%)andgrowth(12.0%)attheday330.However,bothheterobeltiosisandheterosisforallthetraitsinthecrossbredMDwerenegativeexceptthoseforthegrowthatdays20and43.TheresultsindicatetheimportanceofselectingsuperiorhybridvarietiesiftheexploitationofhybridvigorisconsideredinthePacificabalonebreedingprogram.
出版日期
2008年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
