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Crop Science Abstract -

Influence of Single Recessive Endosperm Mutants on Yield and Dry Matter Distribution in Maize (Zea mays L.)1

 

This article in CS

  1. Vol. 11 No. 2, p. 302-303
     
    Received: Oct 27, 1970


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doi:10.2135/cropsci1971.0011183X001100020041x
  1. C. O. Grogan and
  2. C. A. Francis2

Summary

Summary

Seed stocks of recessive endosperm mutants su1, fl2 and o2 were each crossed with several inbred lines of maize. F1 plants were self-pollinated to produce ears segregating for normal and mutant kernels. Careful examination of ears from F2 plants allowed harvest of samples from homozygous normal, heterozygous, and homozygous mutant plants. The heterozygotes were superior in grain yield to either homozygote, and the homozygous normal yielded more than the mutant in su1 and o2 crosses. Husk dry weights were lowest in normal homozygotes of su1 and o2, and in homozygous recessive of fl1. Leaf and stem dry weights showed inconsistent patterns. Plants from normal kernels had a lower ear, husk, and leaf moisture than those of the homozygous recessive. The harvest index (ear wt./total plant wt.) was greater in homozygous normal and heterozygous plants of su1 and o2 maize. The heterozygotes studied appeared to have a more totally efficient system for the conversion of light into dry matter.

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