Disomic Thinopyrum intermedium addition lines in wheat with barley yellow dwarf virus resistance and with rust resistances
1995
Larkin, P.J. (Commonwealth Scientific and Industrial Research Organization, Canberra, Australia.) | Banks, P.M. | Lagudah, E.S. | Appels, R. | Xiao, C. | Zhiyong, X. | Ohm, H.W. | McIntosh, R.A.
Zhong 5 is a partial amphiploid (2n = 56) between Triticum aestivum (12n = 42) and Thinopyrum intermedium (2n = 42) carrying all the chromosomes of wheat and seven pairs of chromosomes from Th. intermedium. Following further backcrossing to wheat, six independent stable 2n = 44 lines were obtained representing 4 disomic chromosome addition lines. One chromosome confers barley yellow dwarf virus (BYDV) resistance, whereas two other chromosomes carry leaf and stem rust resistance; one of the latter also confers stripe rust resistance. Using RFLP and isozyme markers we have shown that the extra chromosome in the Zhong 5-derived BYDV resistant disomic addition lines (Z1, Z2, or Z6) belongs to the homoeologous group 2. It therefore carries a different locus to the BYDV resistant group 7 addition, L1, described previously. The leaf, stem, and stripe rust resistant line (Z4) carries an added group 7 chromosome. The line Z3 has neither BYDV nor rust resistance, is not a group 2 or group 7 addition, and is probably a group I addition. The line Z5 is leaf and stem rust resistant, is not stripe rust resistant, and its homoeology remains unknown
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