Uporaba heteroze in kombinacijske sposobnosti pri dveh linijah hibridnega riža
Povzetek
Dvajset križancev je nastalo iz križanj štirih okoljsko gensko moško sterilnih (EGMS) linij s petimi testerji po principu linija × tester za povečanje heteroze v primerjavi z boljšo starševsko linijo za pridelek zrnja in z njim povezanimi lastnostmi pri rižu (Oryza sativa L.). Pet križancev ‘WTSC9059’ × ‘Sakha101’, ‘WTSC9039’ × ‘Sakha102’, ‘WTSC9059’ × ‘Sakha108’, ‘WTSC9039’ × ‘Sakha108’ in ‘WTSC9039’ × ‘Sakha101’ ima veliko boljše vrednosti za znake kot so število latov, odstotek plodnosti, masa 100 zrn, pridelek zrnja, aparentna heteroza in fenotipska sprejemljivost. Najboljše tri heterotične kombinacije za pridelek zrna na hektar so bile ‘WTSC9059’ × ‘Sakha101’, ‘WTSC9039’ × ‘Sakha102’ in ‘Longping’ × ‘Sakha105’, ki so pokazale 100,00; 71,51 in 66,61 % heterobeltioze. Liniji ‘WTSC9059’ in ‘Longping’ in testerji ‘Sakha101’, ‘Sakha102’ in ‘Sakha108’ so bili prepoznani kot dobri splošni kombinatorji za večino lastnosti in bi lahko bili na široko uporabljeni v bodočih križanjih pri žlahtnenju riža. Pridelek zrnja je zelo značilno pozitivno koreliral z močjo lata in njegovo maso, odstotkom fertilnosti in pojavom heteroze, nasprotno je bila negativna korelacija s površino najvišjega, zastavnega lista.
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DOI: http://dx.doi.org/10.14720/aas.2021.117.1.1847
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