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:: Volume 18, Issue 2 (summer 2016) ::
علوم زراعی 2016, 18(2): 161-177 Back to browse issues page
Determination of the most important agronomic traits affecting seed yield in lentil (Lens culinaris Medik) recombinant inbred lines
Abstract:   (2317 Views)

Study of agronomic traits and their relationship with seed yield can identify appropriate ways led to high yielding varieties selection. This experiment was carried out to investigate the relationship between agronomic traits and seed yield of 118 recombinant inbred lines of lentil (derived from the cross L3685 × Qazvin) along with their parents using alpha lattice design with two replications in research farm of Shahrekord University, Shahrekord, Iran, in 2012-13 and 2013-14 growing seasons. Since the effect of incomplete blocks within each replication was not significant, combined analyisi of variance was performed as randomized complete block design. Results showed that effects of year, lines and line×year were significant for all traits except seed diameter. Lines 111, 82, 30 and 85, were superior for phenological characteristics and seed yield. Estimatied genetic parameters showed that the weight and number of pods per plant, biological yield and seed yield had the highest levels of genetic improvement, genetic and phenotypic coefficients of variation. High heritability was observed for weight of pods per plant (h2=0.70), days to maturity (h2=0.67) and days to flowering (h2=0.58). Pearson correlation coefficient showed positive and significant relationship between seed yield and biological yield, leaf width, number and weight of pods per plant as well as a significant negative relationship with days to flowering and maturity. Stepwise regression indicated the important role of these traits (except of weight of pods per plant) in yield detrmination. By performing path analysis based on stepwise regression, biological yield and leaf width had the most direct effect on seed yield, while the number of pods per plant through biological yield had the most indirect effect on seed yield. Cluster analysis based on all traits formed four groups and superior lines were grouped together. According to the results of this experiment, number of pods per plant, biological yield, leaf width, days to flowering and maturity can be recommended as selection criteria for developing of lentil cultivars with high seed yield.

Keywords: Agronomic traits, Lentil, Path analysis, Seed yield and Stepwise regression.
Full-Text [PDF 275 kb]   (759 Downloads)    
Type of Study: Scientific & Research | Subject: Special
Received: 2016/10/23 | Accepted: 2016/10/23 | Published: 2016/10/23
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Determination of the most important agronomic traits affecting seed yield in lentil (Lens culinaris Medik) recombinant inbred lines . علوم زراعی. 2016; 18 (2) :161-177
URL: http://agrobreedjournal.ir/article-1-638-en.html

Volume 18, Issue 2 (summer 2016) Back to browse issues page
مجله علوم زراعی ایران Iranian Journal of Crop Sciences
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