Quality characteristics of backcross hybrids between Trifolium repens and Trifolium ambiguum |
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Authors: | MT Abberton AH Marshall TPT Michaelson-Yeates TA Williams I Rhodes |
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Institution: | (1) Institute of Grassland and Environmental Research, Plas Gogerddan, Legume Breeding Group, Aberystwyth, SY23 3EB, U.K |
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Abstract: | Two generations of novel backcross hybrids between white clover (Trifolium repens L.) and the related species Trifolium ambiguum,with white clover as the recurrent parent, were analysed for forage quality characteristics. Water soluble carbohydrate (WSC)
levels, nitrogen concentrations (%N), and dry matter digestibility (DMD) were recorded for the hybrids and parental species
grown in deep soil bins with and without a companion grass. Half the experimental material was subjected to moisture stress
by being left unwatered through the four-week period when measurements were made. Four such four -week cycles of drought were
imposed. The first and second generation backcrosses had the highest values for WSC, but were lowest for N%. There was no
difference between the different legume lines (parents and backcrosses) for DMD. No effects of either moisture stress or presence
of a grass companion on quality traits were observed. The WSC and %N of the grass component differed significantly depending
on which legume line it was grown with. The importance of these results for the potential use of these hybrids in agriculture
is discussed.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | backcross interspecific hybrids quality Trifoliumambiguum Trifolium repens |
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