Analysis of Tolerance Indices in Some Rice (Oryza sativa L.) Genotypes at Salt Stress Condition
Journal Title: International Research Journal of Applied and Basic Sciences - Year 2012, Vol 3, Issue 1
Abstract
Rice improvement for salt tolerance requires reliable assessment of salt tolerance variability among segregation genotypes. Sixty five genotypes of rice (traditional, improved and promising lines grown in north of Iran conditions) were evaluated under salt condition containing 0, 3, 6 and 8 dS/m levels during 2010. Five salt tolerance indices comprising: stress tolerances (TOL), mean productivity (MP), geometric mean productivity (GMP), stress tolerance index (STI) and stress susceptibility index (SSI) were used. The indices were adjusted based on shoot length and root dry weight under normal and salt conditions. Analysis of variance for shoot length and root dry weight showed that there was a significant genetic variation among genotypes. Cluster analysis of genotypes using Ys, Yp and five other indices categorized genotypes into five groups for both shoot length and root dry weight. Results of cluster analysis distinguished tolerance and susceptible genotypes. It was concluded that the potential of these genotypes to tolerate salt stress was found to high MP, STI and low SSI for both shoot length and root dry weight. Also, based on broad-sense heritability Ys, TOL and MP for shoot length and Ys, TOL and STI for root dry weight can be used as the best indices for breeding program. Also, by cluster analysis based on tolerant indices, all genotypes were segregated into 4 and 3 groups based on both Yp, Ys, MP, GMP and STI and TOL or SSI, respectively. Therefore, genotypes such as IR56, Yosen, 8803, IR58, R3, 8802 and 8810 as tolerant and Abji Boji, IR30, Amol 2, Neda and 8805 as susceptible can be used in breeding programs.
Authors and Affiliations
Seyyed Jaber Hosseini| Department of Agronomy, Tarbiat Modares University, Tehran, Iran, Zeiniolabedin Tahmasebi Sarvestani| Department of Agronomy, Tarbiat Modares University, Tehran, Iran, Hemmatollah Pirdashti| Agronomy and Plant Breeding Department, Genetics and Agricultural Biotechnology Institute of Tabarestan, Sari Agricultural Science and Natural Resources University, Sari, Iran.Z. Tahmasebi Sarvestani, Department of Agronomy, Tarbiat Modares University, Tehran, Iran. E-mail: Tahmaseb@modares.ac.ir
Keywords
Related Articles
- EP ID EP4871
- DOI -
- Views 594
- Downloads 36
Examining a horse therapy in 8. 12 year-old boy children with autism spectrum disorders
The purpose of this study is to examine a horse therapy in 8_12 year-old boy children with autism spectrum disorders. it is a quasi-experimental study so 18 children with autism spectrum disorders and with an average age...
Criticizing the Deficiencies of ER Diagram Teaching in Database Books
Drawing ER diagram is one of the best methods for abstract representation of system with the aim of semantic modeling of data. Because drawing ER diagram finally leads to database design, if it is drawn correctly, our ri...
The discrepancy between the owners of land and superstructure and their suit against each other
When the ownership of land and superstructure of a property each belongs to different people, none of the owners can obligate the other to divide or sell the property. If the land owner be the occupier of the superstruct...
Effect of desiccation on antioxidant enzymes activity of recalcitrant tea (Camellia sinensis L.) seeds
Tea (Camellia sinensis (L.) O. Kuntze) is the most popular beverage consumed by over two thirds of the world’s population. Tea seed is believed to be recalcitrant based on its sensitivity to chilling or drying stress.Des...
Exploring the trend of international criminal courts approaching the challenges related to international criminal no ex post facto law
No ex post facto law is considered as the fundamentals of law so that it is taken as important in the field of private law and criminal law, even when it comes to international evidences as the right demonstrator. Failin...