Behnam Bakhshi - Academia.edu (original) (raw)

Papers by Behnam Bakhshi

HAL (Le Centre pour la Communication Scientifique Directe), Feb 8, 2019

Plant Molecular Biology Reporter

Cereal Research Communications

Turkish Journal Of Field Crops

One of the complex issue in the way of releasing new high-yielding and stable oilseed rape ‎culti... more One of the complex issue in the way of releasing new high-yielding and stable oilseed rape ‎cultivars is genotype by environment interaction (GEI) which reduce selection efficiency. In ‎the current study, parametric and non-parametric statistics as well as the AMMI model have ‎been compared to identify the best stability models to clarify GEI complexity. The ‎experiment has been conducted in the warm regions of Iran including; Gorgan, Sari, Zabol, ‎and Hajiabad during two cropping seasons (2016-2017 and 2017-2018) for 16 genotypes in a ‎randomized complete block design with three replications. The AMMI analysis of variance on ‎grain yield showed the significant effects of genotype, environment, and the interaction ‎effects of GEI on yield. Based on the AMMI ANOVA, the major contribution of GEI was ‎captured by the first and second interaction principal component axes (IPCA1 and IPCA2) ‎which explained 34.29% and 29.81% of GEI sum of the square, respectively. Additionally, ‎Different...

Cereal Research Communications, 2022

Camelina (Camelina sativa L. Crantz) is an oilseed crop from the Brassicaceae family with several... more Camelina (Camelina sativa L. Crantz) is an oilseed crop from the Brassicaceae family with several characteristics that made it possible to cultivate in various regions of Iran. Camelina is an allohexaploid (2n = 6x = 40) and self-pollinated crop which grows well in the marginal and poor soils and tolerant to low fertility requirement. Moreover, the hardiness of the crop makes it suitable for cropping in low input agricultural fields, such as organic systems or poor soils. Several studies reported tolerance of this crop to abiotic stress including drought, low temperature and salinity. Likewise, the tolerance of this crop to biotic stress like pests and weeds has been also reported previously. Drought, low temperature and salinity tolerance are the main characteristics of camelina. Camelina also has low susceptibility to pests and diseases. This plant has a very high resistance to common pests in oilseeds such as flea beetles. Some studies reported camelina superiority to oilseed rap...

Biosciences Biotechnology Research Asia, 2014

ICSC 2008, 39~ 39 쪽 (총 1 쪽), 2008

누리미디어에서 제공되는 모든 저작물의 저작권은 원저작자에게 있으며, 누리미디어는 각 저작물의 내용을 보증하거나 책임을 지지 않습니다. 단, 누리미디어에서 제공되는 서지정보는 ... more 누리미디어에서 제공되는 모든 저작물의 저작권은 원저작자에게 있으며, 누리미디어는 각 저작물의 내용을 보증하거나 책임을 지지 않습니다. 단, 누리미디어에서 제공되는 서지정보는 저작권법에 의해 보호를 받는 저작물로, 사전 허락 없이 임의로 대량 수집하거나 프로그램에 의한 주기적 ...

ICSC 2008, 39~ 39 쪽 (총 1 쪽), 2008

Journal of Crop Breeding

Sesame is an oilseed crop with high resistance to dehydration. This plant with the minimum moistu... more Sesame is an oilseed crop with high resistance to dehydration. This plant with the minimum moisture requirements has a good performance compared to the other crops in the summer. Recognition of high-yielding genotypes under these conditions is one of the priorities of sesame breeding programs. In the current study, 10 promising sesame lines derived from segregating generations that were superiors in the preliminary evaluations were evaluated along with 6 local genotypes in the form of RCBD with 3 replications in the Sistan region during two cropping seasons. Different quantitative and phenological traits were evaluated during the growing periods. ANOVA results indicated significant differences among genotypes for their grain yield, biological yield, plant height and thousand seed weight. Using Duncan's mean comparison method, genotypes 3, 13, 5 and 7 were identified as superior genotypes. The correlation study of the studied traits showed a positive and significant relationship between grain yield and 1000seed weight. Also, biplot diagram of genotypes distribution on the first two components showed that genotypes 3, 5 and 13 are different from other genotypes in the term of quantitative traits and were considered as the best ones. Cluster analysis for all traits using Ward method also distinguished genotypes 3 and 13 from other genotypes. Additionally, genotypes ranking based on the selection index of ideal genotype (SSIG) revealed genotypes 3 and 13 as high ranking genotypes. Therefore, using different multivariate analysis methods, genotypes 3, 13 and 5 are introduced as desirable yielded genotypes with high compatibility in the Sistan region.

Journal of Crop Breeding

Introduction and Objective: In order to increase the motivation of farmers to cultivate open poll... more Introduction and Objective: In order to increase the motivation of farmers to cultivate open pollinated oilseed rape cultivars, new cultivars with appropriate yields should be introduced. Also, due to the effects of climate change, increase in temperature, early arrival of heat and intensification of drought stress at the end of the season in the warm and dry regions, it is also necessary to pay attention to traits such as early maturity in identifying oilseed rape genotypes. Accordingly, the purpose of this study is to identify the most desirable lines compatible with warm and dry climates. Material and Methods: In order to investigate agronomic characteristics of the promising oilseed rape spring lines, an experiment was conducted with 21 spring genotypes in the Sistan region in a randomized complete block design with three replications during cropping season 2020-2021. Results: Analysis of variance showed that there are significant differences for traits including day to end of flowering, plant height, number of branches per plant, number of pods in subbranches, number of pods per main stem, total number of pods per plant, main stem length, yield and biological yield among the studied genotypes. The study of broad sence heritability showed that phenological traits were more influenced by environmental factors; while quantitative traits of yield and its components were more influenced by genetic factors. Also, the number of branches per plant, the number of pods per main stem and grain yield had the highest values of genetic coefficients of variance, respectively. In addition, the number of pods per main stem, plant height, length of main stem, number of pods per plant, number of branches per plant, seed yield, day to end of flowering and biological yield, had the highest broad sense heritability among the studied traits, respectively. In terms of grain yield, G9 line (SRL-99-1) had the highest yield with a value of 2992 kg/ha. This genotype showed a significant difference with the control cultivar RGS003. Also, G11 (SRL-99-9), G2 (SRL-99-2), G1 (SRL-99-1), Dalgan, G18 (SRL-99-16), G20 (SRL-99-18), G21 (SRL-99-19) and G13 (SRL-99-11) lines were in the next ranks in terms of yield, respectively. Additionally, using various statistical methods such as mean comparison, principal component analysis and cluster analysis, lines were grouped based on the studied traits in this study. Conclusion: In this study, 8 lines with desirable characteristics were identified. The superior lines which were identified in terms of yield and its components in this study, could be introduced as new lines compatible with the warm regions if the trend of superiority continues in adaptability tests.

Plant Genetic Researches

Genetic diversity is key to breeding programs and increasing selection efficiency. In this study,... more Genetic diversity is key to breeding programs and increasing selection efficiency. In this study, 19 promising advanced lines (F7 generation) along with two cultivars, Dalgan and, RGS003 were evaluated in a randomized complete block design with three replications in three experimental field stations (Gorgan, Sari and, Zabol) during the 2020-2021 growing season. The highest phenotypic and genotypic coefficient of variations was found for number of lateral branches and number of pods per plant, respectively. The highest broad sense heritability was estimated for days to end of flowering, and days to start of flowering and the lowest broad sense heritability was estimated for the plant height. The genotypes G16, G18, G15, G1, G2, G5, and G20 with a higher SIIG values as well as a higher seed yield above average were introduced as superior genotypes with respect to yield and other agronomic traits. Therefore, these genotypes can be used for further testing, including adaptation tests. Also, the results of factor analysis and genetic correlation coefficients indicated a positive relationship between number of lateral branches, number of pods per plant and number of seeds per pod with seed yield and seed yield. Generally, it can be concluded that number of lateral branches, number of pods per plant and number of seeds per pod traits could be used as the appropriate criteria to select for increasing seed yield in rapeseed breeding programs.

Food Science & Nutrition

Selection and breeding for high‐yielding in oilseed rape have always been one of the leading obje... more Selection and breeding for high‐yielding in oilseed rape have always been one of the leading objectives for oilseed rape breeders. This process becomes more complicated when all quantitative traits are considered in selection in addition to grain yield. In the present study, 18 oilseed rape genotypes along with 2 check cultivars (RGS003 and Dalgan) were evaluated across 16 environments (a combination of 2 years and eight locations) in the tropical climate regions of Iran during 2018–2019 and 2019–2020 cropping seasons. The experiments were conducted in a format of randomized complete block design (RCBD) with three replications. The obtained multienvironmental trial data were utilized to conduct multivariate analysis, genotype by trait (GT) biplot, and genotype by yield*trait (GYT) biplot (Breeding, Genetics and Genomics, 1:2019). The GT and GYT biplot accounted for 55.5% and 93.6% of the total variation in the first two main components. Based on multivariate analysis and GT biplot, ...

Food Science & Nutrition

The selection based on multiple traits enhances the crop cultivars merit to farmers. In this rega... more The selection based on multiple traits enhances the crop cultivars merit to farmers. In this regard, 19 breeding lines as well as two commercial cultivars were studied using a randomized complete block design (RCBD) with three replications in three locations during the 2020-2021 growing season. In this study, to identify the association among different traits and to select the best rapeseed lines based on multiple traits, genotype × trait (GT) and genotype × yield × trait (GYT) biplot analyses were used. The results showed that using GYT biplot is more efficient than GT biplot. Based on the GYT biplot and superiority index (SI), the breeding lines G16 and G18 were considered as superior genotypes in combination with the agronomical traits, that is, 1000seed weight, number of seeds per pod, number of pods per plant, number of lateral branches, plant height, and pod length with seed yield, which represents a genetic gain in rapeseed breeding program. Based on seed yield combination with phenological traits (early maturity), the breeding line G15 was selected as the best one. Moreover, the line G2 was defined as the superior one in combination of seed yield with pod length. The results indicated that there is a potential for simultaneous genetic improvement of the characteristics (i.e., plant height, number of seeds per pod, early maturity) in rapeseed. Generally, the graphical method of the GYT biplot represented an efficient and practical new way to recognize superior genotypes based on multiple traits in rapeseed breeding programs.

Salinity is one of the most important causes of yield loss in agricultural products, especially w... more Salinity is one of the most important causes of yield loss in agricultural products, especially wheat. Wheat cultivation, on the other hand, is carried out on a wide range of agricultural land in saline lands. Therefore, wheat breeding for tolerance to salinity can be an effective way to improve yield and yield stability under these conditions. In this study, twenty wheat genotypes were studied in a randomized complete block design with three replications in two normal and salinity stress conditions in order to identify suitable indices of wheat stress tolerance and also to identify genotypes tolerant to salinity stress. Genotypes were evaluated based on tolerance index (TOL), stress tolerance index (STI), mean productivity (MP), susceptibility to stress (SSI), geometric mean productivity (GMP), harmonic mean productivity (HM), yield stability (YS) and yield index (YS). The results showed that MP, GMP, HM and STI indices are suitable indices because of their positive and highly sign...

Cereal Research Communications, 2022

In this article the 1st and 3rd authors' affiliations were incorrectly specified. The original ar... more In this article the 1st and 3rd authors' affiliations were incorrectly specified. The original article has been corrected.

Drought stress is one of the most determinative factors of agriculture and plays a major role in ... more Drought stress is one of the most determinative factors of agriculture and plays a major role in limiting crop productivity. This limitation is going to rising through climate changes. However, plants have their own defense systems to moderate the adverse effects of climatic conditions. MicroRNA-mediated post-transcriptional gene regulation is one of these defense mechanisms. The root endophytic fungus Piriformospora indica enhances plant tolerance to environmental stress based on general and non-speciﬁc plant species mechanisms. In this work, we investigated the effects of drought and P. indica inoculation on the expression of two important miRNAs, miR159 and miR396, in rice plants. To this end, leaf samples were harvested at control (F.C.) and severe drought stress (25% F.C.) in P. indica-colonized and non-inoculated rice plants 4 weeks after fungal inoculation. We have observed contrary expression patterns of miR396 (down-regulated) and miR159 (up-regulated) under drought stress ...

HAL (Le Centre pour la Communication Scientifique Directe), Feb 8, 2019

Plant Molecular Biology Reporter

Cereal Research Communications

Turkish Journal Of Field Crops

Cereal Research Communications, 2022

Biosciences Biotechnology Research Asia, 2014

ICSC 2008, 39~ 39 쪽 (총 1 쪽), 2008

Journal of Crop Breeding

Plant Genetic Researches

Food Science & Nutrition

Cereal Research Communications, 2022