Abstract
The effects of nine endosperm mutant genes on dry matter accumulation and percent moisture decrease were studied in three near‐isogenic hybrid backgrounds of corn (Zea mays L.) during the period 35 to 77 days after pollination. Eight of the endosperm mutants were inferior to normal in dry matter accumulation while floury‐l was slightly superior. The shrunken‐1 and sugary‐1 mutants showed the greatest reduction in dry matter, accumulating only 75% and 64% of the total dry matter of normal. The mutants which accumulate greater quantities of sugar and water soluble polysaccharides produced less total dry matter.It appeared that lower dry matter accumulation was accompanied by retention of more moisture. The floury‐l mutant had a slightly lower percent moisture than normal. All other mutants had a greater percent moisture, sugary‐1 being the highest.
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