Evaluation of morphological traits, dry matter yield and quality of Lolium perenne L. autochthonous populations from Serbia through multivariate analysis
Due to specific climatic conditions, perennial ryegrass breeding in Serbia is focused on resistance or tolerance to abiotic stress factors, especially to drought and high temperatures. These traits should be associated with high dry matter yield and quality. Therefore, most frequently used initial m...
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Veröffentlicht in: | Genetika (Beograd) 2011, Vol.43 (1), p.129-140 |
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Sprache: | eng |
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Zusammenfassung: | Due to specific climatic conditions, perennial ryegrass breeding in Serbia is
focused on resistance or tolerance to abiotic stress factors, especially to
drought and high temperatures. These traits should be associated with high
dry matter yield and quality. Therefore, most frequently used initial
material is autochthonous populations and ecotypes adapted to local
agro-ecological conditions, but knowledge about their variability of
important traits for breeding is missing. Pre-selection evaluation of ten
populations of perennial ryegrass originating from Serbia is presented in
this paper. Twenty five traits were investigated during the two-year period
and processed using analysis of variance and multivariate statistical methods
(cluster and principal components analysis). The goal was to determine
diversity and genetic distances of investigated populations by phenotyping
and to define traits considerably affecting the variability and
discrimination of populations. On cluster diagram two groups of population
are observed, but geographic origin of populations (lowland, hilly,
mountainous habitat) was not influence to clustering of collection. Factor
analysis has clarified that first seven principal components (PC) described
almost 95%. The traits which show high correlation coefficients with first
principal component were plant height in first cut, leaf length and width, DM
of generative tillers, spike and spikelet length and 1000 seed weight, and
with second principal component time of heading, terminal internode length,
DM of vegetative tillers, spikelet number and FSU. It can be concluded that
variability between populations was high and that differences of population
were mainly affected by most important traits for breeding, such as
components of dry matter production and some seed yield components.
Usled specificnih klimatskih uslova, oplemenjivanje engleskog ljulja u Srbiji
je fokusirano na toleranciju abiotickih faktora stresa, posebno na susu i
visoke temperature. Stoga se kao pocetni materijal u oplemenjivanju najcesce
upotrebljavaju autohtone populacije i ecotipovi prilagodjeni lokalnim
agro-ekoloskim uslovima. Medjutim saznanja o varijabilnosti najvaznijih
osobina kod autohtonih populacija su vrlo cesto oskudna. U ovom radu su
predstavljena proucavanja varijabilnosti osobina deset populacija engleskog
ljulja poreklom iz Srbija. Dvadeset pet osobina je ispitivano tokom dve
godine, a podaci su obradjeni analizom varijanse i multivarijacionim
statis |
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ISSN: | 0534-0012 1820-6069 |
DOI: | 10.2298/GENSR1101129S |