Indian Society of Genetics & Plant Breeding

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PHENOL REACTION ON SEEDS AND GLUMES IN WHEAT SPECIES AT DIFFERENT LEVELS OF PLOIDY

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One hundred and thirty two accessions of diploid, tetraploid and hexaploid wheat and its
related species were investigated for phenol reaction on seeds and glumes. Diploid species
having A genome produced black or dark brown colour on seeds while those belonging to
D,S,
51, M, MI, C, U and V genomes gave no phenol reaction. Varied reactions were
observed among 4x species containing AABB and UUMM genomes while the species
having AAGG genomes showed no reaction. All hexaploid wheats gave positive reaction
except one accession each of
Triticum aestivum ssp. macha (AABBDD) and T. zhukovskyi
(AAAAGG). Variable reaction to phenol at tetraploid and hexaploid level are likely due to
allelic variation. The coloration on glumes was different from that of seeds. The glumes of
all the einkorn wheats except T.
uranu gave variable degree of coloration. As in the case of
seeds, the glumes of other diploid species except A genome species gave no reaction. The
glumes of tetraploid species gave negative-.eaction, except a few accessions of T.
tIlrgidum
ssp. dicoccoides and carlhlicum, where variation in coloration was observed. Most of the
hexaploid wheats reacted to phenol.The exteritofcolourdevelopmenton seeds differs from
thaton glumes, suggesting that the factor(s) governing phenolreaction ofseeds and glumes
are different and independent of each other. The gene(s) controlling phenol ruction of
seeds and glumes in 4x (AABB) and 6x IAABBDD/AAAAGG) species are contributed by A
genome. However, the source
Of gene(s) controlling phenol reaction in species having
UUMM genome is not known.
  

Keywords: Wheat species, Triticum, Aegilops, phenol test, seed, glumes.

Info

Year: 1991
Volume: 51
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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