Expression of some quantitative triticale traits in different generations of hexaploid triticale X bread wheat crosses

Kapila, R.K.; Sethi, G.S.

Crop Improvement 23(1): 126-130

1996


Accession: 008663377

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Abstract
Performance of the F-1, F-2 and B-2 F-1 (backcross of the F-1 with wheat) generations of six intergeneric hexaploid triticale times bread wheat hybrids along with their parents was studied for five quantitative traits. The families differed significantly for length of hairy peduncle, spikelets/spike and peduncle length. However, the progenies within families differed in many of the crosses. The wheat parents differed from most of the triticale parents for all the traits studied. The F-1' s were intermediate between the two parents in majority of the crosses for duration from ear emergence to anther dehiscence, length of hairy peduncle and peduncle length, whereas tiller/plant and spikelets/spike expressed completely in F1 s. The B-2 F-1 of some of the crosses expressed significantly higher tillers/plant and peduncle length, indicating introgression and expression of these triticale traits in predominantly wheat background. Presence of hairy peduncle in the F-2 and B-2 F-1 generations of most of the crosses indicated transfer and expression of the gene (s) of the 5R chromosome of rye known to govern this trait. Similarly, higher number of spikelets/spike in the F-2 generation of some of the crosses also revealed introgression and expression of this triticale/rye trait in segregating generations. Thus, there existed a possibility of exploitation of some desirable triticale traits acquired from rye in wheat improvement.