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A Corn Mutant Deficient in 2,4-Dihydroxy-7-Methoxy-1,4-Benzoxazin-3-One with an Altered Tolerance of Atrazine

R. H. Hamilton
Weeds
Vol. 12, No. 1 (Jan., 1964), pp. 27-30
DOI: 10.2307/4040633
Stable URL: http://www.jstor.org/stable/4040633
Page Count: 4
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A Corn Mutant Deficient in 2,4-Dihydroxy-7-Methoxy-1,4-Benzoxazin-3-One with an Altered Tolerance of Atrazine
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Abstract

A single-gene homozygous recessive mutant in an S₁ inbred line of corn resulted in an 8- to 10-fold reduction in 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one content. Aqueous suspensions of acetone extracts from low segregates formed little 2-hydroxy-4,6-bis(ethylamino)-s-triazine (hydroxysimazine) when incubated with 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine). Tolerance studies on 3:1 and 1:1 segregating ears indicated that the low segregates were somewhat less tolerant to 2-chloro-4-ethylamino-6-isopropylamino-s-triazine (atrazine) supplied in solution culture.

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