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Phenotype of anthers and microspores in different stages in male sterile (P) and its maintainer (Y). Stage 2 (A,B,G,H): Early uninucleate stage; Stage 4 (C,D,I,J): Binucleate stage; and Stage 5 (E,F,K,L): Trinucleate stage. Bars: 500 µm in (A–F); 50 µm in (G–J).
