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POLYMORPHISM IN ARRHENATHERUM ELATIUS (L.) BEAUV. EX J. & C. PRESL
Author(s) -
MAHMOUD A.,
GRIME J. P.,
FURNESS S. B.
Publication year - 1975
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1975.tb01396.x
Subject(s) - biology , tiller (botany) , herbaceous plant , agronomy , competition (biology) , botany , ecology
SUMMARY In the vicinity of Sheffield, natural populations of Arrhenatherum elatius exhibit continuous variation in tiller and leaf number, leaf length and tiller angle. In the associated range of morphologies, the extremes are represented by erect and prostrate plants. Field and laboratory investigations suggest that this polymorphism is genetically controlled and may be attributed to the conflicting selection pressures imposed by competition for light in tall herbaceous vegetation and by continuous defoliation in pastures.