Volume 16, Issue 2 (2014)
JAST 2014, 16(2): 421-432 |
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Tahir R, Bux H, Kazi A G, Rasheed A, Napar A A, Ajmal S U et al . Evaluation of Pakistani Elite Wheat Germplasm for T1BL.1RS Chromosome Translocation. JAST 2014; 16 (2) :421-432
URL: http://jast.modares.ac.ir/article-23-1358-en.html
URL: http://jast.modares.ac.ir/article-23-1358-en.html
1- Pir Mehr Ali Shah (PMAS)-Arid Agriculture University Rawalpindi, Rawalpindi, Pakistan.
2- Institute of Plant Sciences, University of Sindh Jamshoro-76080, Sindh, Pakistan.
3- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Science and Technology (NUST) Islamabad 44000, Islamabad, Pakistan.
4- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i.Azam University, Islamabad, Pakistan.
5- National Institute of Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan.
2- Institute of Plant Sciences, University of Sindh Jamshoro-76080, Sindh, Pakistan.
3- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Science and Technology (NUST) Islamabad 44000, Islamabad, Pakistan.
4- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i.Azam University, Islamabad, Pakistan.
5- National Institute of Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan.
Abstract: (6552 Views)
Rye (Secale cereale) chromosome 1RS harbors multiple genes including Lr26, Sr31, Yr9 and Pm8 conferring disease resistance and tolerance to abiotic stresses. The introgression of the rye 1R chromosome short arm has enormously contributed to increase of genetic diversity in wheat. Utilization of such translocations in breeding programs demands identification of wheat germplasm possessing the wheat-alien chromosome translocation. This study was designed to screen a set of 102 Pakistani wheat cultivars and candidate lines to identify the rye T1BL.1RS translocation, using cytological, biochemical, and molecular techniques. Results revealed that 12 out of the 40 wheat cultivars were found to have this alien introgression. In the National Uniform Wheat Yield Trials (NUWYT) group, 10 of 23 entries of the rainfed category were identified as carrying 1BL.1RS translocation, while 4 out of 39 genotypes were present in the irrigated category of both NUWYT crop seasons. The valuable information generated can be useful in the crop improvement programs for the production of germplasm possessing T1BL.1RS translocation, in order to enhance the genetic variability in local wheat cultivars and, also, avoid the preponderance of T1BL.1RS candidates.
Keywords: genetic diversity, Constitutive heterochromatin banding, Marker analysis, Mitotic counts, Rye introgression, Wheat collections
Received: 2012/06/17 | Accepted: 2014/01/29 | Published: 2014/03/1
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