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Information Journal Paper

Title

STUDY OF YIELD STABILITY OF NEW CEREAL, TRITIPYRUM, WITH TRITICALE PROMISING LINES AND IRANIAN BREAD WHEAT VARIETIES USING PARTITIONING METHOD OF GENOTYPE × ENVIRONMENT INTERACTIONS

Pages

 Start Page 77 | End Page 93

Abstract

 Background and objectives: The new cereal, PRIMARY TRITIPYRUM is a synthetic amphiploid derived from crossing between durum wheat varieties (Triticum durum, 2n=4x=28, AABB) and wild coach grass species (Thinopyrum bessarabicum, 2n=2x=14, EbEb). The results of investigation on this plant in the last two decades in Iran and England indicated its potential as a highly tolerant plant to NaCl (250 Mm). In addition to salt tolerance, perennially and keep on production tillers in growing season (5 times) it has candidate it as a forage and grain purposes in the salt affected soils and brakish water of the world. Therefore the study of interaction between genotype and environment is important in the process of releasing new lines, So that the evaluation of new lines in a series of uniform experiments is important in order to identify the degree of their adaptation to different environmental conditions. This research was conducted to investigate GENOTYPE × ENVIRONMENT INTERACTION for grain yield and to identify high-yielding and adapted genotypes.Materials and methods: In this study the GENOTYPE × ENVIRONMENT INTERACTION effect containing variation in rank and value for grain yield of seventeen genotypes including eight primary and combined primary of new wheat, tritipyrum lines, five TRITICALE lines and four Iranian wheat varieties was evaluated in a randomized completely block design with three replications in seven environment during growing seasons of 2002, 2003, 2006 and 2011 in three locations of Iran (Kerman, Sirjan, Neyriz) based on MUIR METHOD. In this method, GE interaction separated into two parts: The sum of squares of heterogeneous variance {SS (HV) i} and the sumof squares of imperfect correlation {SS (IC) i} and the importance of each part were interpreted. Statistical analysis was performed using SAS, SPSS software and GEST program.Results: Combined analysis of variance for grain yield showed significant differences between environments and GENOTYPE × ENVIRONMENT INTERACTIONs. Based on Muir criterion the highest and the lowest percentage of changes in rank, were belonged to two wheat cultivars (Omid and Alvand) and two primary combined tritipyrum lines} (St/b) (Cr/b) -4 and (Ka/b) (Cr/b) -6}, respectively. therefore (St/b) (Cr/b) -4 tritipyrum line was indicated as the most stable and Omid wheat cultivar were known as the most unstable genotype. On the base of change portion in rank of sum of square for interactions (86.67%), the M45 TRITICALE line and (Ka/b) (Cr/b) -5 combined PRIMARY TRITIPYRUM line were most stable genotypes with high yield.Conclusion: therefore, at first, with complementary agronomical experiments may release a new grain crop of TRITICALE and new pasture line of combined PRIMARY TRITIPYRUM for forage, at second, tritipyrum line can be used in BREAD WHEAT for producing salt tolerant wheat cultivar/s in Iran.

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