Full TGIF Record # 36875
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Web URL(s):http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2494.1995.tb02319.x/epdf
    Last checked: 10/02/2015
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Publication Type:
i
Refereed
Author(s):Hazard, L.; Ghesquière, M.
Author Affiliation:INRA, Station d'Amelioration des Plantes Fourrageres, Lusignan, France
Title:Evidence from the use of isozyme markers of competition in swards between short-leaved and long-leaved perennial ryegrass
Source:Grass and Forage Science. Vol. 50, No. 3, September 1995, p. 241-248.
# of Pages:8
Publishing Information:Oxford, Blackwell Scientific Publications
Keywords:TIC Keywords: Lolium perenne; Leaf blade length; Tiller density; Competition; Isoenzymes; Genotype mixtures
Abstract/Contents:"Intraspecific competition in Lolium perenne was studied using a replacement series of a short-leaved and a long-leaved genotype that was managed under different cutting frequencies and nitrogen supplies. Leaf length, tiller density and yield were recorded 6 months after sowing. Since the two competitors were labelled at the PGI/2 locus, it was possible to identify unambiguously the origin of tillers in the mixtures and to estimate the average length of lamina of each genotype. The difference in leaf length between the two competitors was maintained under particular types of management and generated contrasting competitive abilities leading to evolution of the genotypic composition of the mixtures. Thus, under infrequent cutting, competition for light resulted in the domination of the long-leaved genotype and in a concomitant intragenotypic selection for leaf length. Supplying nitrogen fertilizer emphasized the phenotypic plasticity of the genotypes, particularly of the dominated one. Frequent cutting reduced competition for light and the change towards the short-leaved genotype was far less rapid. The yielding and competitive abilities of ryegrass genotypes and the implications for breeding are briefly discussed."
Language:English
References:28
Note:Figures
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hazard, L., and M. Ghesquière. 1995. Evidence from the use of isozyme markers of competition in swards between short-leaved and long-leaved perennial ryegrass. Grass Forage Sci. 50(3):p. 241-248.
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Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2494.1995.tb02319.x/epdf
    Last checked: 10/02/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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