Response of Barley Lines with Structural Rearrangements in Chromosomes 5, 6 and 7 to Limited Nitrogen Nutrition |
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Authors: | T Sodkiewicz |
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Institution: | (1) Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479 Poznań, Poland |
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Abstract: | The responses of barley (Hordeum vulgare L.) lines with rebuilt chromosomes 5, 6 and 7 to reduced nitrogen nutrition were evaluated in juvenile growth stages. The
material included two series of duplications (D) produced in the short arm of chromosome 6 and of chromosome 7, and in the
long arm of chromosome 5 and of chromosome 6; their parental translocation lines (T) - from which analyzed duplications were
derived and a standard karyotype cv. Bonus as a control. The translocation lines have break points located in 6S and 7S, or 5L and 6L. Only the lines with duplicated segments of the short arms of satellited (6 and 7) chromosomes exhibited an improved tolerance
to reduced nitrogen supply. No changes relative to cv. Bonus were observed in the T-lines. More tolerant D-lines showed lower
stimulation of the root development. Obtained results suggests that the adaptability factors for the low N tolerance at the
vegetative growth stage of barley are located in the short arms of 6 and 7 chromosomes.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | duplications Hordeum vulgare stress tolerance |
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