List of Articles Recombinant inbred line

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  1 - Evaluation of Spring Wheat Recombinant Inbred Lines under Drought Stress
  M. Moghaddaszadeh-Ahrabi M. Moghaddam Vahed S. Aharizad S.A. Mohammadi
  Iran is one of arid and semi-arid regions of the world. Wheat as a strategic agricultural products faces water deficiency in most areas of the country. Therefore, identification of the resistant varieties to drought stress is one of main aims for breeders. To assess eff More

  Iran is one of arid and semi-arid regions of the world. Wheat as a strategic agricultural products faces water deficiency in most areas of the country. Therefore, identification of the resistant varieties to drought stress is one of main aims for breeders. To assess effect of drought stress at heading on 72 spring wheat recombinant inbred lines derived from American Yecora Rojo (high yielder, dwarf and early maturity) as paternal parent and Iranian No. 49 line (tall and late maturiting) as maternal parent cross were studied. The experiment was conducted at the Research Station of the University of Tabriz using a randomized complete block design with two replications during 2009 growing season. Based on the results from combined analysis of variance significant difference was observed among lines for all of traits studied, except for harvest index, grain number per spike and days to heading. There was significant difference between normal and drought stress conditions. Since the interaction between line and conditions was insignificant for all traits, it does therefore, provide the possibility of comparing the lines without regard to irrigation levels. Based on the means of, the traits it was found that the lines 96, 122, 123 and 155 were superior. MP, GMP and STI indices were recognized to be suitable indices to identify superior lines. With respect to these indices, lines 96, 122, 123, 138, 149 and 155 were found superior as compared with remaining lines. Based on stepwise regression analysis of grain yield with other traits, respectively grain number per spike, number of spikes/m2 and 1000 kernel weight were inserted into final model as effective variables on grain yield, which made 81/9 percent of the grain yield variation. Path analysis of grain yield and related traits, based on stepwise regression, demonstrated the significant positive direct effect for grain number per spike, number of spikes/m2 and 1000 kernel weight on grain yield. Cluster analysis, also showed that, lines under study were grouped into two clusters; superior lines for studied traits assigned to group one. Manuscript profile
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  2 - Study of Yield and Effective Traits in Bread Wheat Recombinant Inbred Lines (Triticum aestivum L.) under Water Deficit Condition
  S. Mohammad zadeh S. Aharizad V. Rashidi
  The effects some traits on seed yield of recombinant inbred lines of wheat under water deficit stress was studied. This research was done at the Agricultural Research Stations, Islamic Azad University, Tabriz Branch in 2010- 2011. 28 recombinant inbred lines of wheat br More

  The effects some traits on seed yield of recombinant inbred lines of wheat under water deficit stress was studied. This research was done at the Agricultural Research Stations, Islamic Azad University, Tabriz Branch in 2010- 2011. 28 recombinant inbred lines of wheat bread with two parents (Norstar and Zagros) in split plot experiment based on a randomized complete block design with three replications at two irrigation levels (70 and 140 mm evaporation from pan class A) were studied. Analysis of variance indicated a significant genetic differences in all traits under study among the lines. Lines No. 32, 163 and 182 produced highest yield under both irrigation levels. Number of spikes, grains per spike and harvest index had the highest positive correlation with grain yield. Path analysis based on stepwise regression showed that under the normal irrigation conditions, number spike (0.556), number of grains per spike (0.278), weight of 1000 grain (0.259) and the drought stress number spike (0.430), straw yield (0.276) and peduncle length (0.323) had the most direct and positive effect on yield respectively. Manuscript profile
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  3 - Response of Bread Wheat Recombinant Inbred Lines to Drought Stress and Their Grouping
  S. Aharizad V. Ahmadi A. Mohammadi
  In order to study the response of bread wheat recombinant inbred lines to drought stress and their grouping an experiment was conducted in split plot based on randomized complete block design with three replications at Islamic Azad University, Tabriz Branch the Agricult More

  In order to study the response of bread wheat recombinant inbred lines to drought stress and their grouping an experiment was conducted in split plot based on randomized complete block design with three replications at Islamic Azad University, Tabriz Branch the Agriculture Research Station. Main factor consist of different levels of irrigation (80, 120 and 160 mm evaporation water from class A evaporation pan) and sub factor included the lines. Result of analysis of variance revealed significant differences among different levels of irrigation for the most of the traits. Mean comparisons showed that drought stress reduced the value of these traits. Significant differences were observed among lines for all the traits except non fertile tiller number. Line × stress interaction was non significant for all of the traits studied. Cluster analysis using WARD algorithm based on the traits under study assigned the lines into two separate groups. Discriminate analysis confirms this grouping. Factor analysis based on principle component analysis and varimax rotation, showed that the first four factors accounted for about 88.69 percent of the total variation. The result revealed that yield and its components and plant height were important traits for selection of promising lines. Manuscript profile
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  4 - Evaluation of Drought Tolerance of Bread Wheat Recombinant Inbred Lines
  ندا Zafar Naderi S. Aharizad
  To evaluateresponse of bread wheat recombinant inbred lines to water deficit, a split plot experiment arranged in randomized complete block design (CRBD) was conducted using eight recombinant inbred lines and their parental cultivars (Roshan and Super Head) with three r More

  To evaluateresponse of bread wheat recombinant inbred lines to water deficit, a split plot experiment arranged in randomized complete block design (CRBD) was conducted using eight recombinant inbred lines and their parental cultivars (Roshan and Super Head) with three replications under three irrigation levels (80, 120 and 160 mm evaporation from class A pan) at the Agriculture Research Station of Islamic Azad University, Tabriz Branch during 2009. The results of analysis of variance data collected revealed significant difference among lines and irrigation levels for grain yield. While line × irrigation level interaction was non significant for grain yield. Based on SSI and TOL, drought tolerance indices lines number 1, 7, 41 and Roshan cultivar under 120 mm evaporation, and lines number 7 and 19 under 160 mm evaporation were the tolerant lines. Under both stress conditions according to STI, MP and GMP indices, lines number 37, 38 and Roshan cultivar were recognized as the tolerant lines to water deficiet. Cluster analyses based on grain yield and drought tolerance indices recognized the lines number 1, 30, 32, 37, 38, 41 and Roshan cultivar under 120 mm and lines number 30, 37 and 38 and Roshan under 160 mm evaporation as the most drought tolerants and higher producers.  Manuscript profile
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  5 - Evaluation of Lentil Recombinant Inbred Lines using Drought Tolerance Indices
  Mohammad Hassan Rahimi Sadollah Houshmand Mahmood Khodambashi
  To identify drought tolerant lines among 168 recombinant inbred lines derived from a cross between Hindi variety of L3685 (high yielding, erect type and early growth) as female parent and Iranian variety of Qazvin (with prostrate growth and late growth) as male parent, More

  To identify drought tolerant lines among 168 recombinant inbred lines derived from a cross between Hindi variety of L3685 (high yielding, erect type and early growth) as female parent and Iranian variety of Qazvin (with prostrate growth and late growth) as male parent, two experiments were conducted in randomized complete block design with three replications under non-stress and drought stress conditions at the experimental Field of Shahrekord University in 2013. Results of combined analysis of variance showed that there were significant differences among lines under study in both experimental conditions in terms of grain yield (P≤0.01). Significant interaction of line×conditions revealed that lines responded differently to drought stress based on grain yield. Results also indicates that lines 160, 125 and 129 were promising lines under both conditions in terms of grain yield. Positive and significant correlation between tolerance indices and grain yield under stress and non-stress conditions indicated that the STI, MP, HARM and GMP indices may identify promising from non promising lines. Based on the above criteria, lines 160, 125, 48, 103 and 129 were recognized as drought tolerant lines. According to the results of principal components analysis, the first and second components determined 97.8% of the total variations among genotypes under study for drought resistance indices. The distribution of lines in the biplot showed genetic variations to the drought stress and thus lines 160, 125, 48, 129 and 103 were identified as high yielders under drought stress condition. Manuscript profile