Production of Leymus racemosus chromosome translocation lines of bread wheat for wheat improvement
Material type:
TextPublication details: 2013Description: p. 113Summary: Leymus racemosus, an evolutionary far related alien species of wheat, possesses many interesting characters for wheat improvement. It includes Biological Nitrification Inhibition (BNI) that may result in a reduction of emissions of nitrous oxide (N2O) greenhouse gas that has more than 300 times the warming power of CO2 as well as of pollution from nitrogen loses to the environment, and novel leaf and stem rust resistance genes and so on. Analysis of the L. racemosus chromosome addition lines has revealed that BNI character resides on L. racemosus chromosome N, I and J and novel leaf and stem rust resistance are on the chromosome A, J and L. To transfer these useful traits to bread wheat, a number of Robertosonian (centromeric) translocation lines have been produced by utilizing monosomic lines of bread wheat. It has been difficult to induce long arm translocations, and also some has been not stable even after successful generation. But some of centromeric translocations have been recovered as disomic condition that includes the short arm of chromosome A, the short arm of chromosome I, the short arm of chromosome J, the short arm of chromosome N and the long arm of chromosome N. For chromosome N which showed major BNI character, we have conducted to reduce the size of translocated chromatin segments further to eliminate undesirable factors of wild species using ph1 gene mutant and have obtained some shorter translocations.
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| Conference proceedings | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Staff Publications Collection | CIS-7558 (Browse shelf(Opens below)) | Available |
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Abstract only
Leymus racemosus, an evolutionary far related alien species of wheat, possesses many interesting characters for wheat improvement. It includes Biological Nitrification Inhibition (BNI) that may result in a reduction of emissions of nitrous oxide (N2O) greenhouse gas that has more than 300 times the warming power of CO2 as well as of pollution from nitrogen loses to the environment, and novel leaf and stem rust resistance genes and so on. Analysis of the L. racemosus chromosome addition lines has revealed that BNI character resides on L. racemosus chromosome N, I and J and novel leaf and stem rust resistance are on the chromosome A, J and L. To transfer these useful traits to bread wheat, a number of Robertosonian (centromeric) translocation lines have been produced by utilizing monosomic lines of bread wheat. It has been difficult to induce long arm translocations, and also some has been not stable even after successful generation. But some of centromeric translocations have been recovered as disomic condition that includes the short arm of chromosome A, the short arm of chromosome I, the short arm of chromosome J, the short arm of chromosome N and the long arm of chromosome N. For chromosome N which showed major BNI character, we have conducted to reduce the size of translocated chromatin segments further to eliminate undesirable factors of wild species using ph1 gene mutant and have obtained some shorter translocations.
Global Wheat Program
English
Lucia Segura
INT2678|INT2902
CIMMYT Staff Publications Collection