Volume 11, Issue 31 (12-2019)                   jcb 2019, 11(31): 115-123 | Back to browse issues page

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Ghorbani H, Samizadeh Lahiji H, Rabiei B, Allahgholipour M. Studying the Relationship between Yield and Correlated Yield Components in Rice (Oryza Sativa L.) Using Regression and Path Analysis. jcb. 2019; 11 (31) :115-123
URL: http://jcb.sanru.ac.ir/article-1-1003-en.html
Crop and Horticultural Science Research Department, Mazandaran Agricultural and Natural Resources Research and Education Center, AREEO, Sari, Iran
Abstract:   (175 Views)
In order to determine the relations between different characteristics with grain yield of rice, a sample of 20 F1 with their parents (five lines and four testers) along with their progenies were arranged in a randomized complete block design with three replications and planted at the research field of rice research institute of Iran. Analysis of variance showed that there was significant difference among genotypes in all of studied traits. Phenotypic and genotypic correlation coefficients showed that number of filled grains (0.68) in panicle and panicle fertility percentage (0.68) has the positive and significant correlation with yield. Results of stepwise regression showed that the traits including number of filled grains in panicle, number of days to complete panicle, panicle fertility percentage and number of grains in panicle explained 87.5 percent of grain yield variation. Path analysis showed that the number of days to complete panicle (0.83) has the highest phenotypic direct effect and the number of filled grains in panicle (0.703) has the highest genotypic direct effect on grain yield. It is recommended that genetic selection for genotypes with higher grains yield could be done with indirect selection for number of grains in panicle at the first step and then for the number of days to complete panicle and number of filled grains in panicle. Due to the proper characteristics of IR76687-22-1-3-2-5 including the high number of grains in panicle, the high number of filled grains in panicle, the high fertility percentage, the number of days to complete panicle and also the high yield, is recommended to conduct the yield comparison and adaptability experiments in different years and locations.
 
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Type of Study: Research | Subject: اصلاح نباتات، بیومتری
Received: 2018/10/15 | Revised: 2019/12/29 | Accepted: 2019/01/8 | Published: 2019/12/4

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