Indian Society of Genetics & Plant Breeding

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Development and characterization of “Ogura” based improved CMS lines of cauliflower (Brassica oleracea var. botrytis L.)

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For the first time, three Ogura based improved cytoplasmic
male sterile (CMS) lines of cauliflower (Brassica oleracea
var. botrytis L.) viz., Ogu1A, Ogu2A and Ogu3A were
developed following seven generations of backcrossing
with snowball group. These lines were evaluated and
compared with their respective fertile maintainer (B) line
for various agronomic traits like curd yield and size, floral
traits like size of petals and style, shape of style and seed
setting traits like number of seeds per pod and seed yield
per plant. Nuclear-cytoplasmic interaction played an
important role in determining various agronomic, floral
and seed setting related traits. All the three CMS lines
were similar with fertile maintainer lines for agronomic
traits like days to curd maturity. The curd yield of Ogu1A
and Ogu3A were similar with their respective maintainer
lines. However, introgression of alien Ogura cytoplasm in
the background of snowball cauliflower significantly
reduced the petal size, filament length, style and stamen
length. Number of pods per plant was significantly lower
in all three CMS lines, when compared with their respective
B lines. Number of seeds per pod and seed yield per plant
in Ogu3A and its respective B line was at par but reduced
significantly in Ogu1A and Ogu2A after introgression of
Ogura cytoplasm.
 

Keywords: Snowball cauliflower, CMS, commercial traits, floral traits, hybrid

Info

Year: 2011
Volume: 71
Issue: 1
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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