Indian Society of Genetics & Plant Breeding

Characterization of β-carotene rich MAS-derived maize inbreds possessing rare genetic variation in β-carotene hydroxylase gene

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Traditional yellow maize kernels though contain enough
carotenoids, the concentration of β-carotene is quite low.
A rare natural variant of crtRB1 gene enhances β-carotene
in the kernel by blocking its conversion to further
components. β-carotene rich versions of inbreds, VQL1,
VQL2,V335,V345, HKI161, HKI323 and HKI1105 developed
through marker-assisted backcross breeding strategy
were characterized for selected DUS-characters, yield and
yield, attributing traits. The crtRB1-introgressed inbreds
displayed high degree of phenotypic resemblance with
their respective original parents for majority of the
characters. V335 based introgressed inbreds displayed
100% phenotypic similarity to original parent, followed by
VQL1 (88.9-100%), HKI161 (88.9-100%),VQL2 (94.4%),V345
(88.9%), HKI323 (83.3-94.4%) and HKI1105 (77.8-83.3%)
based introgressed inbreds. Introgressed inbreds having
contrast for pigmentation in glume base and silk (with
respective recurrent parents) possess great utility for
registration and unambiguous identification in the field.
These newly developed β-carotene rich maize inbreds hold
enormous potential in maize biofortification programme.

Keywords: β-carotene, biofortification, crtRB1, characterization, maize


Year: 2014
Volume: 74
Issue: Supplementry Issue
Article DOI: 10.5958/0975-6906.2014.00900.6
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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