Principal Components Analysis of Some F1 Sunflower Hybrids at Germination and Early Seedling Growth Stage

Estimating genetic diversity inside breeding materials using morphological, physiological and biochemical data and selection of superior hybrids are essential in sunflower breeding programs. Principal components analysis is one of the multivariate statistical methods that can be utilized for genetic diversity estimation and grouping of genotypes through biplot diagrams. In order to study the principal components analysis of some F 1 sunflower hybrids at germination and early seedling growth stage, a randomized complete block design has been conducted with three replications. Plant materials consisted of 18 single cross sunflower hybrids set of six male restorer lines crossed with 18 female (CMS) lines using the North Carolina Design I scheme. The first calculated two components accounted for 80.93 % of the variability in the original data. Seed vigor index (SVI) has a highest weight in the first component while second component was more associated with the shoot/root ratio (SHRR). Based on the created biplot diagram, three distinct groups could be differentiated. Key words: genetic diversity, hybrid, principal components analysis, sunflower Cimlenme ve Erken Fide Gelisim Asamasinda Bazi F 1 Aycicegi Melezlerinin Temel Bilesenler Analizi OZET : Aycicegi islah programlarinda morfolojik, fizyolojik ve biyokimyasal veriler uzerinden ustun hibritlerin secilmesi ve islah materyallerinin genetik cesitliliginin belirlenmesi oldukca onemlidir. Biplot diagramlar yoluyla genotiplerin gruplandirilmasinda ve genetik cesitliliginin belirlenmesinde kullanilan, temel bilesenler analizi cok degiskenli istatistik metotlarindan birisidir. Cimlenme ve erken fide gelisim asamasinda olan bazi F 1 aycicegi hibritlerinde, temel bilesenler analizini uygulamak icin tamamen tesadufi blok denemesi 3 tekerrurlu olarak kurulmustur. Bitki materyalleri, 6 erkek restorer hattin 18 erkek kisir disi hatla bir North Carolina Design I planinda melezlenmesi ile olusturulmus 18 tek melez aycicegi hibrit setinden olusmaktadir. Iki bilesen, orjinal verilerin degiskenliginin % 80.93'unu olusturmaktadir. Birinci bilesende tohum canlilik indeksi (SVI) en yuksek agirliga sahip iken ikinci bilesen daha cok surgun/kok orani (SHRR) ile iliskilidir. Biplot diagramina  gore bilesenler ile 3 farkli grup olusturulmustur. Anahtar kelimeler: Genetik cesitlilik, hibrit, temel bilesenler analizi, aycicegi