Abstract
Shattering causes huge losses to Brassica even if harvesting is done mechanically. To
study the shattering tolerance in different rapeseeds lines, a study was conducted in split
plot design at experimental area of Barani Agricultural Research Institute (BARI)
Chakwal, Pakistan during two winter season 2014-15 & 2015-16 under the rainfed
conditions. The experimental material comprised of 10 advanced lines including one
local variety of rapeseed viz: 8CBN001, 8CBN002, 10CBN003, 10CBN005,
11CBN001, 11CBN003, 11CBN009, 11CBN011, 12CBN003 and Chakwal Sarsoon
The main experimental plot was harvested at four different harvesting dates (HD)
including: HD1 = Harvesting of each advanced line at crop maturity, HD2= 10 days
after the first harvesting (DAFH), HD3= 20 DAFH, HD4= 30 DAFH. The comparison
of difference between the grain yield of each advanced line at various harvesting dates
with its seed yield at first harvesting date (HD1-HDi) were calculated as indices of pods
shattering. Combined analysis of variance depicted that all the genotypes were
significantly different for HD, harvesting date and advanced lines interaction effect,
year and its interaction effects to each factors. The significant difference of genotypes
into harvesting dates demonstrated various level of pods shattering of all advanced lines
at different harvesting dates. The amount of grain yield due to shattering losses was
increased at third and fourth harvesting dates. On the basis of shattering tolerance
indices, advanced line 10CBN005 was more tolerant to shattering losses and 8CBN002
was more susceptible to shattering as compared to others promising genotypes.
Tamoor Hussain, Muhammad Azeem Tariq, Ramzan Ansar, Muhammad Tariq, Ahmad Sher. (2018) Screening of breeding lines of Brassica napus L. tolerant to grain shattering, Asian Journal of Agriculture and Biology, Volume 6, Issue 2.
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