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Evaluation of Adaptation and Sustainabilit of Winter Oilseed Rape Mutant Lines in Cold and Mild Cold Regions of Iran by GGE Biplot Method

Mehrzad Ahmadi; Mansoor Omidi; Bahram Alizadeh; Ali Akbar Shah nejat Bushehri

Volume 44, Issue 3 , December 2021, , Pages 345-347

https://doi.org/10.22055/ppd.2021.33627.1912

Abstract

AbstractIntroductionOilseed rape is the third most important oil crop in the world after oil palm and soybean. The world's oilseed rape production was 4.6 million tons in 2018-2019 ... Read More AbstractIntroductionOilseed rape is the third most important oil crop in the world after oil palm and soybean. The world's oilseed rape production was 4.6 million tons in 2018-2019 and has the ability to compensate for the lack of edible oil in Iran (containing 40-45% oil). The production of this crop is mainly done by using two zero cultivars with a low level of glucosinolate in the feed and the absence of Erucic acid in the oil. Two types of oilseed rape are cultivated in Iran, spring and autumn. Spring type is cultivated in warm regions of the Caspian Sea coast and southern regions of the country and its autumn type is mostly cultivated in cold and mild cold regions. Materials and MethodsIn this study 16 rapeseed mutant lines obtained through Gama radiation of three rapeseed cultivars Talaye, Zarfam and Express with 800, 900 and 1200 gray dose rates, followed by 7 selfing generation, are compared during two years for earliness, seed and oil yield and other important agronomic traits in four regions Karaj, Kermanshah, Esfahan and Zarghan with three check varieties. The oil content of rapeseed varieties and lines were determined by NMR (nuclear magnetic resonance) at chemic laboratory of Oilseed Crops Research Department of Seed and Plant Improvement Institute. Finally, the highest yield early maturity lines were defined. Each treatment was sown in plot with four rows, four meters lenght and 30 cm between row distances. The experimental field was prepared in late summer and chemical fertilizer were given to it. The sowing experiment were planned for late week of September until the first week of October.At the end of each cropping year, the yield of each plot was harvested separately and the statistical calculations were carried out after the gathering of two years results by GGE biplot method. Results and DiscussionResults of combined ANOVA showed that main effects of year and genotype, interaction of location ×genotype; year × location, and interaction of year, location and genotype had significant effects on grain yield. The genotypes showed the highest and the lowest grain yield in Kermanshah 4016 kg/ha and Zarghan 2886 kg/ha stations, respectively. Line T-900-4 produced the highest grain yield 3840 kg/ha in all locations. To study the interaction of genotypes and environments, GGE biplot method was used. Based on the polygonal graphs related to genotypes, line Z-800-6, Z-900-7, Okapi and Z-800-3 produced the highest yield in Karaj, Zarghan, Kermanshah and Esfahan, respectively. Regarding the imaginary ideal genotype graph and biplot of genotypes and environments and seed yield ranking, line Z-900-7 were identified as the best genotypes due to its higher yield and stability. ConclusionIn Iran, 70% of rapeseed production is done in warm regions and only 30% in cold regions. Therefore, breeding cold-tolerant cultivars by using mutations will increase rapeseed cultivation in the cold region of Iran.

Study of Silique Shattering Tolerance Genetic and Related Traits in Winter Oilseed Rape Genotypes Using Diallel Cross Method

Mostafa Eidi Kohnaki; ghaffar kiani; Bahram Alizadeh; Ghorban Ali Nemat Zadeh; Hassan Amiri Oghan

Volume 44, Issue 1 , June 2021, , Pages 65-76

https://doi.org/10.22055/ppd.2019.28332.1714

Abstract

AbstractBackground and ObjectivesAlthough the opening of the silique is a valuable mechanism for the distribution of seeds in nature, it is also a significant problem in oilseed rape ... Read More AbstractBackground and ObjectivesAlthough the opening of the silique is a valuable mechanism for the distribution of seeds in nature, it is also a significant problem in oilseed rape cultivation. Seed shedding from siliques at and after maturity is commonly referred to as pod shatter, and it reduces the grain yield of oilseed rape (Brassica napus). This factor, also called dehiscence, can cause losses of up to 50% of potential grain yield if harvesting is delayed and in adverse weather conditions. As a general consideration, canola is susceptible to shattering, and there is little genetic diversity associated with silique shattering tolerance in its commercial lines hence, increasing shatter tolerance is an important breeding objective. Materials and MethodsIn the present study, eleven parents were used to generate 55 hybrids. The experiment was carried out as a complete randomized block design with three replications at the seed and plant improvement institute. Silique Shattering Tolerance Index (SSTI) using Random Impact Test (RIT) and other related traits were measured during 2018. Griffing's model I of method II was used for the analysis of variance and the estimation of genetic parameters. Correlation coefficients for the studied traits and other calculations were performed using the SPSS software and Excel program. ResultsAnalysis of variance of genotypes showed high genetic diversity for the studied traits. Similarly, the general and specific combining ability variances were significant for most traits such as grain yield and the silique shattering tolerance index. This indicates the contribution of additive and non-additive effects in the genetic control of these traits. The general heritability of the studied traits was observed in the range of 78.81% to 93.87%. Correlation coefficients of traits showed a positive and significant correlation between silique shattering tolerance index with grain yield and oil content. Moreover, Zarfam and ES Artist with a good performance and silique shattering tolerance index are considered the best general combiners. Okapi×Zarfam, Nafis×ES Artist, Ahmadi×Nafis, Ahmadi×ES Neptune, Zarfam×ES Neptune, Nafis×ES Natalie, and Nima×ES Natalie are recommended as the best specific combinations for mechanized oilseed rape harvest and improvement of the shattering tolerance trait. DiscussionLow specific heritability of grain yield can be due to the more outstanding contribution of non-additive effects than additive effects. Various research studied variable estimation for general and specific combining ability and other parameters due to the difference in genetic materials and different weather conditions.

Biplot Trait Analysis of Some of Canola (Brassica napus L.) Genotypes in Irrigation and Drought Stress Conditions

F M; H D; B A

Volume 35, Issue 3 , December 2012, , Pages 1-16

Abstract

Canola is an important industrial plant in oil production, and in recent years, it has drawn a lot of alteration due to its adaptation to the arid regions. To determine the relationship ... Read More

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Author = Bahram Alizadeh

Evaluation of Adaptation and Sustainabilit of Winter Oilseed Rape Mutant Lines in Cold and Mild Cold Regions of Iran by GGE Biplot Method

Abstract

Study of Silique Shattering Tolerance Genetic and Related Traits in Winter Oilseed Rape Genotypes Using Diallel Cross Method

Abstract

Biplot Trait Analysis of Some of Canola (Brassica napus L.) Genotypes in Irrigation and Drought Stress Conditions

Abstract