Separating correlation coefficients into direct and indirect effects of important morphological traits on grain yield in 28 bread wheat genotypes under terminal drought stress
Journal Title: International Journal of Farming and Allied Sciences - Year 2013, Vol 2, Issue 24
Abstract
Analyzing the correlation of various traits and components of grain yield is a very important issue in selection and breeding programs for genotypes, thus an experiment was conducted using 28 bread wheat genotypes in the form of completely randomized blocks design with two replications in order to investigate the correlation of various traits with wheat grain yield under terminal drought stress and to determine the contribution of those traits with maximum effect on grain yield and also to explore the direct and indirect effects of grain yield on its components and vice versa. Results from variance analysis were indicative of a significant difference between study genotypes in terms of plant height, biological yield, grain number per spike, spike length, spike weight, days to anthesis, days to heading, days to maturity, grain filling period, ratio of Peduncle to height, spike number/m2 and grain yield. In studying the simple correlation of traits of grain yield with traits of biological yield, traits such as spike weight and spike number/m2 produced a positively significant correlation, in addition, apart from traits such as fertile tiller, days to anthesis and harvest index all other traits had a positively insignificant relation with grain yield. Results of step by step regression indicated that spike length, spike weight and spike number per m2 with a description coefficient of as much as 0.73 accounted for the most part of grain yield changes. Path analysis of grain yield and its components indicated that 1000 grain yield had the highest direct effect (0.629) on grain yield, and after that spike number per m2 had positively direct effect (0.573) on grain yield. Also, the direct effect of grain number per spike on yield was positive (0.457). The indirect effects through these traits don’t play a major role on grain yield. Results from this study are indicative of the fact that traits such as 1000 grain weight and spike number per m2 can be considered criteria for selecting productive bread wheat genotypes.
Authors and Affiliations
Reza shahryari, Amir Garib Eshghi,Vahid Mollasadeghi, and Reza Serajamani
Keywords
Related Articles
- EP ID EP32472
- DOI -
- Views 322
- Downloads 0
Comparison of molecular markers ( RAPD, ISSR) for determination genetic differences two of Crocus genus
In this study, the genetic diversity of 25 Iranian Crocus genotypes from three species (C. speciosus, C. cancellatus and C. sativus) were evaluated using ISSR and RAPD molecular markers. 19 RAPD primers were selected t...
Morphological traits of maize affected by seed vigor and water limitation
An experiment was conducted as factorial based on RCB design with three replicates in 2010 to investigate the effects of seed vigor (three seed lots with acceptable normal germinations of 98%, 92% and 88%) and differen...
Genetic diversity of Lolium Multiflorum accessions using ISSR molecular markers
Genetic diversity based on different markers, plays a key role in breeding programs and one of the most important criteria for selection of Parents. In this study the genetic diversity among 13 accessions of Lolium Mul...
Phytoremediation, a Method for Treatment of Petroleum Hydrocarbon Contaminated Soils
Petroleum hydrocarbons mostly contaminate environment due to inherent ability, such as solubility, volatility, and their biodegradable, they also identified toxic for animal. The petroleum has been released from an und...
Study floodwater spreading systems and solutions to increase their efficiency (Case study watershed Defyh Rafsanjan Iran)
Iran, due to special geographical position, topography and the climate is arid and semi-arid world. Water as a factor limiting human activities in arid regions of the country. Therefore, water and essential role in sha...