Indian Society of Genetics & Plant Breeding

Morpho-anatomical and SSR diversity in mutant gene pool of jute (Corchorus olitorius L.)

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Characterization of induced mutants is gaining importance
for increasing efficiency of mutation assisted plant
breeding. In this study, phenotypic and genetic diversity of
a set of 60 mutants of Corchorus olitorius (tossa jute), an
important fibre yielding crop species were characterized
using morphological traits related to fibre and biomass
productivity, anatomical traits related to fibre distribution
and development in the bark tissues of jute and simple
sequence repeat (SSR) polymorphism. Morpho-anatomical
diversity revealed high variability in the population,
identifying mutant genotypes with superior fibre recovery
and fibre anatomy traits. Ten of these mutants exhibited
higher fibre recovery than a popular cultivar, JRO 204. A
good number of mutants exhibited superior fibre anatomy
characters like fibre wedge length, fibre wedge breadth
and number of fibre cells per bundle than the cultivars.
Twenty three SSR markers amplified a total of 53 alleles
with polymorphism information content of 0.53. Six markers,
MJM 006, MJM 432, MJM 489, MJM 566, MJM 569 and MJM
618 exhibited high resolving power (= 0.5). SSR marker
based cluster analysis identified more genetic groups than
morphogenetic classification, but association between
genetic and phenotypic classification was low. For selection
of parents for mutation assisted genetic improvement in
jute, judicious use of both diversity measures for selection
of parents would be more useful.

Keywords: Corchorus olitorius; tossa jute; mutant; fibre anatomy; SSR; genetic diversity


Year: 2014
Volume: 74
Issue: 4
Article DOI: 10.5958/0975-6906.2014.00873.6
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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