Journal ArticleDOI
Genetic variability for leaf development in perennial ryegrass populations
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The genetic variability of components of leaf morphogenesis of perennial ryegrass was studied in 2 populations obtained from two cycles of divergent selection for lamina length, in 42 natural populations, and in forage and turf cultivars.Abstract:
In perennial ryegrass (Lolium perenne, L.), leaf length is a highly heritable trait likely to respond to both natural and artificial selection. The genetic variability of components of leaf morphogenesis of perennial ryegrass was studied in 2 populations obtained from two cycles of divergent selection for lamina length, in 42 natural populations, and in forage and turf cultivars. The genetic progress in the two branches of the divergent selection was accompanied by a significant change in the leaf elongation rate, whereas the phyllochron and the leaf elongation duration remained relatively unchanged. The forage cultivars were not morphogenetically different from the natural populations, and hence progress for yield under infrequent cutting could be made by selection for long-leaf populations. Turf cultivars, however, were morphogenetically different from natural populations. Turf cultivars had small leaves with short sheaths and laminae. The population resulting from the selection for short leaf had lamin...read more
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Journal ArticleDOI
QTL Analysis of Morphological, Developmental, and Winter Hardiness-Associated Traits in Perennial Ryegrass
Toshihiko Yamada,Elizabeth S. Jones,Noel O. I. Cogan,A. C. Vecchies,T. Nomura,Hiroshi Hisano,Yoshiya Shimamoto,Kevin F. Smith,M D Hayward,John W. Forster,John W. Forster +10 more
TL;DR: The QTL analysis of multiple phenotypic traits provides the basis for marker assisted selection (MAS) of important agronomic characters, allowing genetic improvement of yield, quality and adaptation in perennial ryegrass breeding.
Journal ArticleDOI
Tillering Responses to the Light Environment and to Defoliation in Populations of Perennial Ryegrass (Lolium perenneL.) Selected for Contrasting Leaf Length
TL;DR: Tillering responses to the light environment and to defoliation were studied in two populations of perennial ryegrass selected for contrasting leaf lengths to determine whether dierences in tillering responses between populations, as a result of management practices, aected their competitive ability.
Journal ArticleDOI
Differences in Tillering of Long- and Short-Leaved Perennial Ryegrass Genetic Lines under Full Light and Shade Treatments
I. Bahmani,Laurent Hazard,Claude Varlet-Grancher,M. Betin,Gilles Lemaire,Cory Matthew,E. R. Thom +6 more
TL;DR: Study of the relationship between leaf length and tillering in perennial ryegrass found selection fbr high LER and long lamina length, even though associated with reduced site filling in all treatments, did not necessarily result in reduced tiller number per plant.
Journal ArticleDOI
Effects of perennial ryegrass cultivars on intake, digestibility, and milk yield in dairy cows.
TL;DR: It is concluded that the 8 diploid perennial ryegrass cultivars used in the experiments do not provide grass breeders with encouraging evidence to include selection criteria for an increased DM intake, DM digestibility, and MY in their grass breeding schemes.
Journal ArticleDOI
Genetics and molecular breeding in Lolium/Festuca grass species complex
TL;DR: This research focuses on the development of DNA Marker-aided Selection Technology for Plants and Animals in Lolium/Festuca grass species complex in Japan.
References
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Journal ArticleDOI
Phenotypic plasticity and contrasting habitat colonization in Festuca pallescens
TL;DR: Data showed that phenotypic plasticity allows for diverse habitat colonization of this widespread species of Festuca pallescens.
Journal ArticleDOI
The use of electrophoretic techniques to distinguish perennial ryegrass cultivars when sown in mixtures
TL;DR: In this paper, the authors describe the principles, requirements and use of an electrophoretic technique together with a mathematical concept which can be used to distinguish certain perennial ryegrass cultivars when sown in mixtures.