01433nam a2200241Ia 4500003001000000005001700010040000900027245005400036490003000090520070700120700001700827700001900844700001200863700001700875700001600892700001800908700001800926700001800944700001500962700001700977856015600994008004101150MX-MdCICY20260521091049.0  cCICY10aCytokinin Oxidase Regulates Rice Grain Production0 vScience, 309, p.741, 20053 aMost agriculturally important traits are regulated by genes known as quantitative trait loci (QTLs)derived from natural allelic variations. We here show that a QTL that increases grain productivity in rice, Gn1a, is a gene for cytokinin oxidase/ dehydrogenase (OsCKX2), an enzyme that degrades the phytohormone cytokinin. Reduced expression of OsCKX2 causes cytokinin accumulation in inflorescence meristems and increases the number of reproductive organs, resulting in enhanced grain yield. QTL pyramiding to combine loci for grain number and plant height in the same genetic background generated lines exhibiting both beneficial traits. These results provide a strategy for tailormade crop improvemen12aAshikari, M.12aSakakibara, H.12aLin, S.12aYamamoto, T.12aTakashi, T.12aNishimura, A.12aAngeles, E.R.12aAngeles, E.R.12aKitano, H.12aMatsuoka, M.40uhttps://drive.google.com/file/d/1YauHzCKMEKkoARFj1kNwgPGbyQOEls4U/view?usp=drivesdkzPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx250602s9999    xx |||||s2   |||| ||und|d