INHERITANCE AND QTL MAPPING OF AGRONOMICAL TRAITS IN BARLEY

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RAHIMI M.; EBRAHIMPOUR F.; ESHGHI R.

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Journal: Crop Biotechnology Year:2013 | Volume:2 | Issue:3 Page(s): 35-48

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Information Journal Paper

Title

INHERITANCE AND QTL MAPPING OF AGRONOMICAL TRAITS IN BARLEY

Author(s)

RAHIMI M. | EBRAHIMPOUR F. | ESHGHI R. | Issue Writer Certificate

Keywords

BARLEYQ2

GENERATION MEAN ANALYSISQ3

QTL MAPPINGQ2

GENETIC MAPQ2

MARKER-ASSISTED SELECTIONQ1

Abstract

In this study, an F2:3 populations derived from the cross between Hiberna and Pfyner was used to analyze the inheritance of yield and its components in BARLEY by GENERATION MEAN ANALYSIS and to map the corresponding QTLs (quantitative trait loci) by microsatellite markers. GENERATION MEAN ANALYSIS suggested that both additive and dominance effects were important for most of the traits evaluated, but dominance and non-allelic interaction had a more pronounced effect for days to maturity, number of grains per spike, spike length and plant height. The highest heritability was obtained for number of tillers, indicating that this trait is controlled by additive effects. The additive effects played major role in the inheritance of grain yield per plant, since heritability of this trait was low. The linkage map constructed by 159 microsatellite markers covered a total length of about 1030.5 cM. Using the method of composite interval mapping 2, 4, 2, 4, 1, 4 and 7 QTLs were detected for days to maturity, number of tillers, 1000-grain weight, plant height, spike length, number of grains per spike and grain yield, respectively. Ten QTLs had corresponding occurrences with the QTLs reported earlier, indicating that these QTLs are stable across genetic backgrounds. The results of this study also showed that, grain yield per plant controls with several minor genes. It can therefore be concluded that direct improvement of this trait is somehow problematic. Two major QTLs contributed by ‘Pfyner’ on chromosomes 1H and 2H (qgs-1 and qnt-2a) were found to significantly increase number of grains per spike and number of tillers, respectively. Thus, genetic improvement in grain yield would be easier through indirect selection for these QTLs than through direct selection for grain yield.

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APA: Copy

RAHIMI, M., EBRAHIMPOUR, F., & ESHGHI, R.. (2013). INHERITANCE AND QTL MAPPING OF AGRONOMICAL TRAITS IN BARLEY. JOURNAL OF CROP BIOTECHNOLOGY, 2(3), 35-48. SID. https://sid.ir/paper/226801/en

Vancouver: Copy

RAHIMI M., EBRAHIMPOUR F., ESHGHI R.. INHERITANCE AND QTL MAPPING OF AGRONOMICAL TRAITS IN BARLEY. JOURNAL OF CROP BIOTECHNOLOGY[Internet]. 2013;2(3):35-48. Available from: https://sid.ir/paper/226801/en

IEEE: Copy

M. RAHIMI, F. EBRAHIMPOUR, and R. ESHGHI, “INHERITANCE AND QTL MAPPING OF AGRONOMICAL TRAITS IN BARLEY,” JOURNAL OF CROP BIOTECHNOLOGY, vol. 2, no. 3, pp. 35–48, 2013, [Online]. Available: https://sid.ir/paper/226801/en

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