Limited genotype- and ploidy-related variation in the nutritive value of perennial ryegrass (Lolium perenne L.) |
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Authors: | Heba Salama Marc Lösche Antje Herrmann Martin Gierus Ralf Loges Ulf Feuerstein |
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Institution: | 1. Institute of Crop Science and Plant Breeding, Grass and Forage Science/Organic Agriculture , Christian-Albrecht University of Kiel , Kiel, Germany heba1942001@yahoo.com;3. Institute of Crop Science and Plant Breeding, Grass and Forage Science/Organic Agriculture , Christian-Albrecht University of Kiel , Kiel, Germany;4. Euro Grass Breeding GmbH &5. Co. KG , Asendorf, Germany |
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Abstract: | Abstract Water-soluble carbohydrates and fibre fractions are important traits that influence forage utilization by the ruminant. Little is known about the quality variation among perennial ryegrass genotypes within the same maturity group or between near-isogenic diploids and tetraploids. The current study was carried out in the form of two experiments on two successive years (2006–2007) in three sites in Northern Germany. The main aim was to investigate the variation in nutritive value that could be attributed to differences in maturity among 20 intermediate heading perennial ryegrass genotypes or to differences in ploidy between near-isogenic diploids and tetraploids. Results of the first experiment revealed significant variation among the 20 tested genotypes in the investigated quality parameters that were consistent with the discovered variation in the maturity of the genotypes determined in terms of their Mean Stage by Count (MSC). In the second experiment, few but consistent significant differences were detected between near-isogenic diploids and tetraploids. The tetraploid derivatives had always significantly higher water-soluble carbohydrate content and lower neutral detergent fibre (NDF), acid detergent fibre (ADF) and acid detergent lignin (ADL) than their near-isogenic diploid parents. |
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Keywords: | ADF ADL Mean Stage by Count NDF ploidy level water-soluble carbohydrates |
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