1160 KB91 KB200420252025Elgammaal, AmgadElsheery, NabilGaballah, Mahmoud M.Ghazy, MohamedMahrose, Hasnaaletnik:121številka:223 str.DOI:10.14720/aas.2025.121.2.20051ISSN:1854-1941COBISSID_HOST:242732035URN:URN:NBN:SI:doc-O9C6PPN9enZaložba Univerze v LjubljaniActa agriculturae Slovenicacombing abilitycorrelationdroughtdvodimezionalna barvna predstavitev podatkovheatmapheterosisheterozakorelacijasposobnost kombinacijesušaIdentifying gene actions to rice yield and its components traits under both normal and drought conditions|Eight rice genotypes were selected to conduct all crosses in diallel Method 2 Model 1 design to generate genotypes tolerance to drought stress with high yield potential. The parents Giza179 and Sakha 108 and the crosses UYR 3472 × GZ10739 and GZ10487 × Giza179 reported the highest mean values of the grain yield plant-1 under drought conditions. Two and twelve hybrids revealed desirable highly and highly significant positive heterotic effects as a deviation over mid parent, one hybrid obtained significant positive heterotic over betterparent under natural condition. Regarding the grain yield plant-1, four and six parents showed desirable significant and highly significant positive general combing ability effects under either natural and drought conditions, respectively. Five and thirteen hybrids showed desirable significant and highly significant positive specific combining ability effects under both natural and drought conditions, respectively regarding grain yield plant-1. The high significant and positive associated among grain yield and days to heading, relative water content, number of panicles plant-1, thousand grain mass and water use efficiency for both natural and drought environments. The crosses GZ10739 × WAB 638-1, GZ10739 × IRAT112 and WAB 638-1 × IRAT 112 had superior in most agronomic traits at drought conditionIzbranih je bilo osem genotipov riža za izvedbo dialelnih križanj (Metoda 2 Model 1) za vzgojo genotipov s toleranco na sušo in velikim potencialom pridelka. Križanci starševskih genotipov Giza179 in Sakha 108 in križanci UYR 3472 × GZ10739 ter GZ10487 × Giza179 so imeli največji poprečni pridelek zrnja na rastlino v razmerah suše. Dva in dvanajst križancev je imelo zaželjen velik, značilen pozitivni heterotični učinek kot odklon od poprečja staršev, eden od križancev je v naravnih razmerah dosegel značilno pozitiven heterotični učinek glede na boljšega starša. Glede na pridelek zrnja na rastlino so štiri in šest staršev pokazali zaželjene značilne, pozitivne, splošne kombinacijske učinke v naravnih razmerah kot v razmerah suše. Pet in trinajst križancev je v naravnih in sušnih razmerah pokazalo zaželjene in visoko značilne pozitivne specifične kombinacijske učinke glede na pridelek zrnja na rastlino. Ugotovljena je bila zelo značilna in pozitivna povezava med pridelkom zrnja, dnevi do klasenja, relativno vsebnostjo vode, številom latov na rastlino, maso tisočih zrn in učinkovitostjo izrabe vode v normalnem in sušnem okolju. Križanja GZ10739 × WAB 638-1, GZ10739 × IRAT112 in WAB 638-1 × IRAT 112 so bila superiorna v vseh agronomskih lastnostih v razmerah sušeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Biotehniška fakulteta