Naslov
Assessment of alfalfa genetic resources by phenotypic traits analysis

Autori
Tucak, Marijana ; Popović, Svetislav ; Čupić, Tihomir ; Šimić, Gordana ; Gantner, Ranko ; Meglič, Vladimir ;

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts of the 19th Eucarpia conference Genetic Resources Section / Meglič, Vladimir ; Bastar, Manja Tina - Ljubljana : Kmetijski inštitut Slovenije, 2009, 30-30

ISBN
978-961-6505-40-6

Skup
19th Eucarpia conference Genetic Resources Section

Mjesto i datum
Ljubljana, Slovenija, 26.05.2009. - 29.05.2009

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Alfalfa collection ; variability ; principal component analysis

Sažetak
Crop improvement depends largely on the availability of diverse germplasm and their efficient utilization. The evaluation, characterization and screening of genetic resources are considered priorities in alfalfa breeding as such information is crucial in choosing material for incorporation into breeding activities. The objectives of this research were to explore the extent and pattern of phenotypic variability in the alfalfa collections, to classify the germplasm into similar groups and to identify the main traits contributing to the overall variability. Twenty seven populations and cultivars of alfalfa of different origin were evaluated for thirteen phenotypic traits on experimental fields of Agricultural Institute Osijek in Osijek during three (2004-2006) growing seasons. Collected data were centered and scaled to unit variance and analyzed by principal component (PC) analysis. The first four PCs contributed to 89.02% of the total variability among the populations and cultivars. The yields of green mass and dry matter, vigour, growth habit, plant regeneration and length of central leaflet were the most important traits for the genetic variability, representing 58.21% of the total variability in the first PC variable. The second PC explained 16.24% of the variability and was associated with number of stems, shape of leaf and width of central leaflet. The cluster analysis preformed on the two first components grouped the majority of alfalfa cultivars and populations into three clusters of germplasm. In most cases, clustering did not depend on the country of origin. The present investigation revealed that there was wide phenotypic variability for many of assessed traits in the alfalfa collections.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA