Indian Society of Genetics & Plant Breeding

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Identification and evaluation of Indian mustard genotypes for white rust resistance and agronomic performance

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The screening of 2000 Indian mustard accessions against
white rust and phenotypic evaluation of resistant
accessions to assess the nature and magnitude of genetic
diversity including their agronomic potential was carried
out at three locations during rabi of 2014-2016. Out of 2000
germplasm accessions, 168, 46 and 185 accessions were
found resistant at Ludhiana, Pantnagar, and Hissar,
respectively but only 27 were identified as resistant across
the locations indicating the pathogenic variability at
different locations. These 27 accessions were further
validated under artificial inoculation and eight of them,
namely, IC265495, IC313380, EC766091, EC766133, EC766134,
EC766192, EC766230 and EC766272 were identified as highly
resistant with disease severity reaction (PDI = 0) to A.
candida at both cotyledonary and true leaf stages.
Agronomic evaluation of these 27 accessions facilitated
the identification of superior genotypes with high
magnitude of genetic diversity for their use in breeding. As
compared to check varieties, elite genotype(s) such as
IC313380 was found promising for days to flowering (40),
silique on main stem (52.6), silique length (4.2 cm), seeds
per silique (17.2) and oil content (41.4%); EC766230 for no.
of primary branches (8), seeds/ silique (16.8), seed yield/
plant (16.0g), oil content (38.7%) while EC766272 for silique
on main stem (55.50), seed yield/plant (18g) and oil content
(40.5%). The resistant accessions coupled with agronomic
superiority may be useful genetic resources for
improvement of Indian mustard. In addition, the resistant
accessions can serve as a rich gene pool for breeding
programmes.
 

Keywords: Indian mustard, Albugo candida, white rust, germplasm

Info

Year: 2018
Volume: 78
Issue: 1
Article DOI: 10.5958/0975-6906.2018.00009.3
Print ISSN: 0019-5200
Online ISSN: 0975-6906

Authors

info_circle
Laxman Prasad info_circle
J. Nanjundan info_circle
A. K. Tewar info_circle
Paramjeet Singh info_circle
P. S. Sandhu info_circle
Ram Avtar info_circle

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