Not AvailableEffects of high temperature stress during terminal stage
on crop growth and genetic parameters were investigated
in 18 advanced breeding lines and 4 varieties of Indian
mustard [Brassica juncea (L.) Czernj. & Cosson] under
normal (E1) and late sown (E2) conditions. Genotypes BPR
538-10 showed terminal heat tolerance for biological yield/
plant, seed yield/plant, total dry matter 60 days after sowing
(DAS), crop growth rate (CGR) and relative growth rate (40-
60 DAS) and heat use efficiency while RH 0216 possessed
terminal heat stress tolerance only for biological yield/plant.
Terminal heat stress decreased heat use efficiency by 16.1%
in BPR-538-10 to 66.3% in BPR-327-1-B. Heat use efficiency
had high PCV and moderate GCV under E1. The seed yield/
plant exhibited significant and positive association with
leaf area index (LAI) at 40 days after sowing (r= 0.434*),
CGR during 40-60 DAS (r = 0.592* *), total dry matter at 60
DAS (r = 0.590* *), and heat use efficiency (0.795* *) under
high temperature stress. The study suggested that rapid
leaf area development resulting in to high total dry matter
production is vital for developing suitable varieties against
terminal heat stress.Not Availabl
