NDLI: Isozyme and quantitative traits polymorphisms in European provenances of perennial ryegrass (Lolium perenne L)

Content Provider	Springer Nature Link
Author	Ursla Fernando, W.M. Hayward, M.D. Kearsey, M.J.
Copyright Year	1997
Abstract	Twenty populations of Lolium perenne originating from a range of habitats in Europe were compared for isoenzyme polymorphisms and agronomically important quantitative traits in order to establish relationships of the levels of diversity with the origin of each population and to assess their suitability to be included in the European core collection of Lolium germplasm. Forty genotypes from each of the twenty populations and each genotype represented by three clonal propagules, were field planted in a fully randomized spaced plant design and fifteen quantitative characters including yield, persistency, reproductive and disease resistence characters were evaluated over a period of two years. Seven putative isozyme loci were assayed to compare the allozyme divergence of populations. The results of the isozyme survey indicate that 71–100% of the loci were polymorphic, 2.3–3.0 alleles/locus and the gene diversity was varying from 0.234–0.410. Of the total allelic diversity 94% remained within populations (Hs) whilst only 6% was distributed among populations (Dst). The differences between populations were determined on the basis of allele frequencies and multivariate analyses of quantitative characters. Populations significantly differed in their allele frequencies at all loci analysed. Random mating was predominant in all populations at most of the loci. The study revealed that the German accession BA 10998 was clearly distinct from the rest both in quantitative characters and allele frequencies. German accession BA 11015 with the lowest gene diversity showed the highest genetic variation for quantitative characters. However, no strict relationship was found between the genetic distance and the geograpical distribution of the populations. Among the quantitative characters, flowering time showed a strong relationship with the type of management practised at the collection site than their place of origin.
Starting Page	263
Ending Page	269
Page Count	7
File Format	PDF
ISSN	00142336
Journal	Euphytica
Volume Number	93
Issue Number	3
e-ISSN	15735060
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Plant Sciences Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Horticulture Agronomy and Crop Science

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