Production and cytogenetics of a new Thinopyrum elongatum/Triticum aestivum hybrid, its amphiploid and backcross derivatives
2008
Kazi, A.M. (National Inst. of Biotechnology and Genetic Engineering, Faisalabad (Pakistan)) | Cortes, A. (International Maize and Wheat Improvement Center, Apartado (Mexico)) | Gul, A. (National Inst. of Biotechnology and Genetic Engineering, Faisalabad (Pakistan)) | Farooq, M. (National Agricultural Research Centre, Islamabad (Pakistan)) | Majeed, F. (National Inst. of Biotechnology and Genetic Engineering, Faisalabad (Pakistan)) | Ahmad, I. (National Agricultural Research Centre, Islamabad (Pakistan)) | Bux, H. (Quaid-e-Azam Univ., Islamabad (Pakistan)) | William, M. | Rosas, V. | Delgado, R.
Genetic diversity is crucial for crop improvement. In wheat this resource is distributed within the three gene pools of the tribe Triticeae and priority usage over the last decade has been with the D genome diploid progenitor of the primary gene pool. Potent variability that contributes towards resistance/ tolerance to key biotic/abiotic stresses limiting wheat production is also available in the tertiary pool where Thinopyrum elongatum (2n=2x=14, EE) possesses usable diversity for improving wheat. It has been hybridized with a top quality commercial hexaploid wheat cultivar as the maternal parent in order to capture its cytoplasmic advantage if any and for developing genetic stocks in terms of Th. elongatum disomic chromosome addition lines for identifying positive individual chromosomal contributions towards some key stresses that limit wheat productivity.
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