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Amylose Analysis of Single Kernels and Its Implication for Breeding of High‐Amylose Corn ( Zea mays L.) 1
Author(s) -
Haunold Alfred,
Lindsey M. F.
Publication year - 1964
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1964.0011183x000400010019x
Subject(s) - amylose , zea mays , crop , agricultural experiment station , library science , biology , agronomy , agriculture , starch , computer science , ecology , biochemistry
BEFORE the discovery of the amylose extender gene (ae) it was recognized that a starch type composed primarily of linear glucose polymers would be of potential value to industry. Normal corn starch contains approximately 25% amylose (a basically unbranched glucose polymer) and 75% amylopectin (a branched glucose polymer) . A single recessive gene, "waxy", had been found in cereals such as corn, sorghum, barley and rice, which produced starch composed entirely of amylopectin. Attempts to use certain known endosperm mutants, notably su1; su2, and du, produced genetic stocks whose starch was as high as 65% amylose (2). Starch yield, however, was disappointingly low (2, 3). Vineyard and Bear (9) and Kramer et al. (5) reported a new endosperm mutant that increased the amylose content of corn endosperm starch to about 60% with no associated reduction in starch yield. Kramer (5) called the