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Variation in the concentration of major carbohydrates in the grain of some spring barleys
Author(s) -
Torp Jan
Publication year - 1980
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740311220
Subject(s) - amylose , starch , agronomy , dry matter , resistant starch , food science , yield (engineering) , chemistry , biology , materials science , metallurgy
A procedure adapted for rapid routine analyses was used to determine the content of starch, amylose, low molecular weight carbohydrates, and dietary fibre in grain from 37 barley genotypes grown in triplicate yield trials. Among 20 high‐yielding spring barley varieties grown in two subsequent years, the content of starch varied from 55 to 62% of the dry matter, while the content of amylose varied from 23 to 35% and averaged 30% of the starch. Among 17 exotic genotypes and mutant lines the content of starch and amylose in starch varied from 43 to 62% and from 17 to 48%, respectively. The amylose content was related neither to starch content nor grain yield. The content of low molecular weight carbohydrates was high in some starch‐deficient mutants but close to 2% in all other varieties and genotypes. There was a negative relation between grain yield and low molecular weight carbohydrates among the high‐yielding varieties. The content of dietary fibre varied from 18 to 25% in high‐yielding varieties, but was considerably influenced by environment. The content of dietary fibre was unrelated to grain yield or kernel weight. The exotic genotypes contained from 14 to 29% dietary fibre. Starch‐deficient mutants produced more dietary fibre per kernel than did normal varieties.