Cytomorphological studies in triticale in relation to grain shrivelling
1997
Khanna, V.K. | Rao, M.R. | Komarneni, R.R. (Department of Genetics and Plant Breeding, G.B. Plant Agrivarsity, Pantnagar (India))
These cultivars of hexaploid triticale, namely UPT 72142 having shrivelled grains, UPT 79339 with medium grains, and UPT 79354 having plump grains, were used for cytological and morphological studies in relation to grain shrivelling. Giemsa staining revealed that in UPT 79354, with plump grains, and UPT 79339, with medium grains, there were only four rye chromosomes, while UPT 72142, with highly shrivelled grains, possessed 10 rye chromosomes. The endosperm was single-layered in UPT 79339 in the central ventral region, but double-layered in other regions. In UPT 79354 the central portion was full of endosperm cells with a lumen in the centre. The crease was the widest and the endosperm region the smallest in the highly shrivelled UPT 72142 as compared to the other strains. The highly shrivelled appearance of the grains of UPT 72142 seemed to be due promarily to pericarp shrivelling and to separation from the seed coat.
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