Table 2. The translocation types and frequencies of wheat-A. cristatum chromosome 2P translocation.
Type of 2P TLa | No. of TL | Frequency of TL (%) | |
---|---|---|---|
Contain whole 2P chromosome | Large and small alien segmental | 1 | 2.04 |
Small alien segmental | 2 | 4.08 | |
Without whole 2P chromosome | Large alien segmentalb + Whole-arm | 2 | 4.08 |
Small alien segmentalc + Whole-armd | 2 | 4.08 | |
Two small alien segmental + Two intercalary | 1 | 2.04 | |
Two small alien segmental+Intercalarye | 1 | 2.04 | |
Whole arm + Intercalary | 1 | 2.04 | |
Large and small alien segmental | 10 | 20.41 | |
Whole-arm reciprocal | 2 | 4.08 | |
Large alien segmental | 10 | 20.41 | |
Small alien segmental | 5 | 10.20 | |
Whole-arm | 7 | 14.29 | |
Intercalary | 3 | 6.12 | |
Chimera | 2 | 4.08 | |
Total | 49 | 100 |
a translocation line.
b large alien segmental translocation indicates that the chromosome 2P segment is longer than one arm, the chromosome contains A. cristatum 2P centromere but no wheat centromere
c small alien segmental translocation indicates that the chromosome 2P segment is shorter than one arm, the chromosome contains wheat centromere but no A. cristatum 2P centromere
d whole-arm translocation indicates that both of the arms of the translocated chromosome are from wheat and A. cristatum respectively
e intercalary translocation indicates that chromosome 2P segment is inserted into wheat chromosome arms.