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      • Open Access Article

        1 - Study of drought stress of hybrid corns (Zea mays) using drought tolerance indices
        Mohsen Farshadfar Hooshmand Safari Hooman Shirvani Mostafa Amjadian Hoshang Rahmati
        In order to investigate drought tolerance of maize hybrids, a split plot experiment was conducted in a randomized complete block design (RCBD) with three replications in the research field of Payame Noor University (PNU) of Kermanshah in 2013. The main factor included d More
        In order to investigate drought tolerance of maize hybrids, a split plot experiment was conducted in a randomized complete block design (RCBD) with three replications in the research field of Payame Noor University (PNU) of Kermanshah in 2013. The main factor included drought stress (stress and normal condition) and sub factor including nine corn hybrids. The results of analysis of variance indicate the different reaction of the hybrids studied for grain yield and the ability to select hybrids based on yield. Comparison of numerical values ​​and rank of each hybrid based on grain yield based on grain tolerance index showed that hybrids number one, three, seven and eight were identified as drought tolerant hybrids.Results of correlation analysis showed that MP, GMP, STI, HAR, K1, K2, SSPI and YI had positive and significant correlations with Yp and Ys.They are suitable for choosing high yield hybrids in both conditions. Gabriel's bi-plot drawing was performed based on the analysis of the main components. Based on this breakdown, the first two components justify about 98 percent of the variance. The results showed that the studied hybrids were located in two groups of high yield potential and weak potential, so that hybrids number one, three, seven and eight were placed in the vicinity of drought stress tolerance vectors as superior hybrids. The cluster analysis, based on the superior indices of the studied hybrids grouped the hybrids into two clusters that are similar to the Gabriel bi-plot. Manuscript profile
      • Open Access Article

        2 - Factor analysis genetic correlation and path analysis of different traits in durum wheat genotypes
        Hadis Heidarinejad Ahmad Ismaili Tahmaseb Hosseinpour Hamidreza Eisvand
        In order to investigate the path analysis of effective traits on durum wheat yield, an experiment was conducted based on randomized complete block design with 18 genotypes and four replications in Agricultural and Natural Resources Research Center of Lorestan province d More
        In order to investigate the path analysis of effective traits on durum wheat yield, an experiment was conducted based on randomized complete block design with 18 genotypes and four replications in Agricultural and Natural Resources Research Center of Lorestan province during 2014–2015. In Factor analysis, the first factor was named as influencing factor on flag leaf characteristics, the second factor was named as influencing factor on height, and the third factor was named as influencing factors on yield performance. According to results of genetic correlations, biomass yield, straw yield, kernel per spike and spike length had very strong positive correlation with grain yield. According to results of stepwise regression and path analysis, straw yield, kernel per spike and peduncle length entered to the regression model, and so the straw yield had highest and largest direct effect on grain yield. As kernel per spike and straw yield were more important, these traits could be advisable in breeding programs of durum wheat. In present research, bi-plot analysis was used to simultaneous study of traits and discrimination of genotypes related to these traits, and hence, genotypes of Dehdasht, Seimareh, Pod-20 and Alas were introduced as hopefull genotypes for future breeding programs. Manuscript profile
      • Open Access Article

        3 - Genetic Diversity of Different Agronomic Traits in Rice Genotypes (Oryza sativa L.)
        Nasim Ranjkesh Morteza sam deliri pouria mazloum Amirabbas mousavi valiollah rameeh
        Rice is one of the most important strategic products that is considered to be the main food of the world. In this regard, an experiment was conducted with 30 native and modified rice genotypes in a randomized complete block design at research farm of Sari University of More
        Rice is one of the most important strategic products that is considered to be the main food of the world. In this regard, an experiment was conducted with 30 native and modified rice genotypes in a randomized complete block design at research farm of Sari University of Agricultural Sciences and Natural Resources with four replications in 2016-2017. The studied traits were plant height, length of panicles, number of effective tillers, total number of grains, number of unfilled grains, number of filled grains, 1000-grain weight, biological yield, grain yield, harvest index, chlorophyll index and growth period. The results of analysis of variance showed that genotypes have a significant difference in terms of traits, which indicates the existence of genetic variation among genotypes. The results of mean comparisons showed that the highest mean total number of grains and number of filled grains in the cluster belonged to the genotype of the Keshvari. The results of principal components analysis showed that the first five principal components accounted for 78.050% of the total variation. The cluster analysis by Unweighted Pair Group Method Arithmetic (UPGMA) method and with the euclidean distance criterion for studied traits, genotypes studied were divided into five groups. Manuscript profile
      • Open Access Article

        4 - Study response of maize (Zea mays L.) hybrids to drought stress using physiological and stress tolerance indices
        mohammad moradi Seyed Sajad Hosseini Falehi
        Drought is the most important environmental stress in agriculture and improving yield maize under drought is a major goal of plant breeding. In order to evalutiaon 15 hybrids under normal and water stress regimes (irrigated after 90±5 and 135±5 mm evaporat More
        Drought is the most important environmental stress in agriculture and improving yield maize under drought is a major goal of plant breeding. In order to evalutiaon 15 hybrids under normal and water stress regimes (irrigated after 90±5 and 135±5 mm evaporation from class A pan for normal and water stress conditions, respectively), a study was conducted at Dezful in Khuzestan Province, during 2014 growing seasons, using RCBD with three replications. The results of the variance analysis showed that differences among the genotypes, in terms of all indices and yield in normal and drought stress conditions were significant. Highly significant correlations were found between the grain yield and some physiological traits in drought stress condition, such as RWC and root weight, So these traits can be reliable criteria for the selection of tolerant genotypes with prospect to higher yields. Results of correlation between defferente drought tolerance indices with grain yield in both conditions (normal and water stress) showed that MP, GMP and STI were a successful index to select high yield and tolerante genotypes. Based on this indices and the results of the biplot diagram and cluster analysis the crosses SD/17×SD/15, SD/3×SD/17, CML×SD/3 and CML×SD/17 had the best drought tolerance and the crosses SD/10×SD/704, SD/15×SD/704 and SD/17×SD/10 were high sensitivity to drought and can be identified as the most sensitive hybrids to drought. Manuscript profile
      • Open Access Article

        5 - Assessing the adaptability of rice genotypes through GGE Biplot for farmland grabbing in some Central and West Asian countries
        Hosein Rahim Soroush Abbas Shahdi Kumleh Alireza Tarang Maryam Hosseini Chaleshtori Mehrzad Allahgholipour Alireza Haghighi Hasanalideh
        In order to evaluate the adaptability, yield and some important agronomic and qualitative traits of rice, this study was carried out with 14 rice genotypes, including 12 rice lines and varieties from Rice Research Institute of Iran along with a regional (Khazar) and a l More
        In order to evaluate the adaptability, yield and some important agronomic and qualitative traits of rice, this study was carried out with 14 rice genotypes, including 12 rice lines and varieties from Rice Research Institute of Iran along with a regional (Khazar) and a local (Hashemi, Esteghlal, Yasmin and Osmancik) check in paddy areas of Iran, Azerbaijan, Turkey and Iraq as the first regional project for Central and West Asian countries under a research program entitled “Establishing a Multi-location Evaluation and Research Network for Genetic Enhancement in Central and West Asia (EMERGE-CWA)”. The experimental design was a randomized complete block design with three replications. Simple and combined analysis of variance, comparison means of traits and stability analysis through GGE Biplot was conducted. Stability analysis results for yield based on compound analysis in three regions of Turkey, Iraq and Iran by GGE Biplot method revealed that the most stable genotypes are Gohar, Dorfak, 184104-34, 184104-11, 18333-12 and 18425-20, respectively. These genotypes had higher yield than average. This research resulted in selecting line 18426-56-3 in Turkey, Shiroodi and Dorfak varieties in Iraq, five promising line including 18425-20, 18436-56-3, 184104-34, 184104-11 and 18433-12 in Iran as the genotypes with high and intermediate yield and desirable agronomic and grain quality characteristics. These genotypes would be utilized in advanced trials of various rice breeding programs to release directly as new varieties. Manuscript profile
      • Open Access Article

        6 - Rice drought-tolerant genotypes recognition using multivariate analysis
        Reza Karim Koshteh Hossein Sabouri
        Breeding rice for drought tolerance requires proper evaluation and analysis of genetic diversity in breeding parameters are related to drought tolerance. To identify tolerant index and sensitive rice genotypes to drought stress, an environment was conducted with 59 geno More
        Breeding rice for drought tolerance requires proper evaluation and analysis of genetic diversity in breeding parameters are related to drought tolerance. To identify tolerant index and sensitive rice genotypes to drought stress, an environment was conducted with 59 genotypes of rice in a complete block design with three replications in two flooding and water stress conditions in 2013 growing season in Aliadad Research Farm in Gonbad Kavous, Iran. Data variance analysis showed highly significant differences among genotypes for all studied traits. Significant genetic variation detected between genotypes and the traits evaluated. Analysis of correlation among the performance in terms of flooding and drought and stress tolerance indices showed that the SSI, STI, MP, GMP, HM and YI indices as the best indicators in both flooding and drought stress conditions which could be detect the genotypes by demonstrate robust, high-performance. Cluster analysis was performed using drought tolerance indices, genotypes were divided into three groups. Genotypes with drought tolerance indices were used and they were divided into three groups. Genotype-by IRAT177, IR62761-20, IR60080-42, B6144F-MR-6-0-0, CT13382-8-3-M, UPLRi-7, and IRAT212 were placed in third group and considered as the most drought-sensitive genotypes. According to the indicators of drought tolerance genotypes Caiapo, IR68702-072-1- 4-B and Pegaso considered to have the highest yield in both environmental conditions and a high STI as suggested tolerant genotypes. Manuscript profile
      • Open Access Article

        7 - The use of cluster analysis and principal component analysis for group selection of inbred lines of wheat under rainfed condition
        Zahra Abedi Jalal Saba Afshin Tavakoli Kazem Soleimani
        In order to select high yielding and adapted wheat lines for rainfed condition, 165 inbred lines of wheat with four controls were examined in a 13 × 13 square lattice design with two replications in the Agricultural Research Station of Zanjan University during 201 More
        In order to select high yielding and adapted wheat lines for rainfed condition, 165 inbred lines of wheat with four controls were examined in a 13 × 13 square lattice design with two replications in the Agricultural Research Station of Zanjan University during 2010­-­2011. Number of effective tillers, plant height, spike length, awn length, number of grains per spike, seed number per plant, 1000 grain weight, grain yield, biomass and harvest index were evaluated. The studied lines showed significant differences and cluster analysis by Ward method categorized 169 lines into three distinct groups. The results of principal component analysis and biplot were relatively consistent with grouping of cluster analysis. According to the results of grouping and importance of traits in drought resistance and yield under stress conditions, third group lines were recognized as the best lines with higher plant height and favorable yield characteristics and are recommended for future breeding programs. Manuscript profile