Correlation analysis of seedling traits under lead stress in sunflower (Helianthus annuus L.)
2016
Ismail, A.
Sunflower is an important oilseed crop. Its oil is premium. The research was conducted in the wire house of Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad. The trial was laid out by following complete randomized design under factorial experiment with three replications. Pb was used as heavy metal. Ten genotypes of sunflower (Sundak, HA 302, Saturn, CM 374, CM 195, CMS CM 338, CM 603, CM 182, RHA 282 and CM 88) were exposing to heavy metal lead. Data were recorded on germination percentage, fresh root weight, fresh shoot weight, dry root weight, dry shoot weight, shoot length, root length, chlorophyll content, Pb absorption in leaves, Pb absorption in shoot and Pb absorption in roots. The recorded data were subjected to analysis of variance, correlation and path coefficient analysis. The accessions were highly significant for studied traits. The accession Saturn showed good performance for shoot length, lead contents in shoot and lead content in roots. Selection criteria can be based on the results of correlation and path coefficient analysis. Genotypic and phenotypic correlation of lead in root and chlorophyll content was highly significant and positive. In all accessions, genotypic correlation is higher than phenotypic correlation. Root length, fresh root weight, fresh shoot weight, dry root weight, dry shoot weight had positive indirect effect on lead content in shoot and positive direct effect on lead stress in shoot.
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