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Morphological characteristics of chalky grain of rice. (A) Perfect grain. Left and right panels show pictures of whole grain and horizontal slice, respectively. (B) Chalky grain. Left, whole grain; middle, vertical slice; right, horizontal slices. (C) SEM pictures. Center part of perfect grain (a), and translucent (b) and opaque (c) parts of chalky grain were subjected to SEM observation. Magnifications were x1,000 (a,b,c-1), x4,000 (c-2) and x10,000 (c-3, c-4), respectively
