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Inheritance of the concentration of water-soluble carbohydrates and its relationship with the concentrations of fibre and crude protein in herbage of cocksfoot (Dactylis glomerata L.)

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Title: Inheritance of the concentration of water-soluble carbohydrates and its relationship with the concentrations of fibre and crude protein in herbage of cocksfoot (Dactylis glomerata L.)
Other Titles: Inheritance of concentration of water-soluble carbohydrates in cocksfoot
Authors: Sanada, Y. Browse this author
Takai, T. Browse this author
Yamada, T. Browse this author
Keywords: fructan
genetic variation
mono- and disaccharides
water-soluble carbohydrates
Issue Date: Sep-2007
Publisher: Blackwell Publishing
Journal Title: Grass and Forage Science
Volume: 62
Issue: 3
Start Page: 322
End Page: 331
Publisher DOI: 10.1111/j.1365-2494.2007.00586.x
Abstract: The concentration of water-soluble carbohydrates (WSC) of cocksfoot is lower than that of other temperate grasses. Increasing in the WSC concentration in cocksfoot is important in increasing its digestibility and preference by ruminants. The genetic variation in mono- and disaccharides, fructans and total WSC concentrations and their interrelationships with crude protein (CP) and fibre concentrations of cocksfoot (Dactylis glomerata L.) at the vegetative growth stage in half-sib cross populations were assessed in two experiments conducted under spaced-planting and sward conditions. There was a wide range in the means for concentrations of fructan, WSC and neutral-detergent fibre (NDF) in parents and progeny whereas there was a narrow range of the means for concentrations of mono- and disaccharides, CP and acid-detergent fibre (ADF). Mean concentrations of mono- and disaccharides showed the smallest range. Mean squares of entries in parents and progenies were significant for mono- and disaccharides, fructan and total WSC concentrations in all populations. The entry × year interactions for fructan and total WSC concentrations were significant in parents and half-sib progeny. However, the entry × year interactions for mono- and disaccharide concentrations in progeny were not significant. Concentration of WSC was under genetic control since mean squares of the concentration values were significant and variance components for all traits were significantly larger than zero. There were negative genetic correlations between WSC and ADF and NDF concentrations. Narrow sense heritabilities (hn) estimated from variance components of progeny for total WSC concentrations were 0.59 and 0.53 in sward and space-planting conditions, respectively. The hn of fructan and WSC concentrations were similar in both sward and spaced-planting conditions, whereas that of mono- and disaccharide concentrations varied from 0.20 to 0.69. It was found that the genetic variation of total WSC concentration in cocksfoot depended mainly on genetic variation in fructan concentration. These results suggested that the forage quality of cocksfoot at the vegetative growth stage was influenced by an additive gene effect and could be improved genetically by recurrent selection.
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Type: article (author version)
Appears in Collections:北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山田 敏彦

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