Abstract
In our present report, we evaluated seven rapeseed mustard cultivars at coastal saline zone of West Bengal, India under rice-mustard sequence in a triplicated randomized block design for 14 traits to study their performance under late sown (2nd December) condition. The cultivars were sown at 30 cm × 10 cm spacing during winter of 2013?14 and 2014?15. The soil was clay in texture and had the following key properties for the 0?30 cm layer: pH 5.84, electrical conductivity (EC) 1.55 dS/m, available nitrogen (N) 155.24 kg/ha, available phosphorus (P) 105.76 kg/ha, available potassium (K) 365.86 kg/ha and available B 2.63 kg/ha. Among the seven cultivars, Kranti produced significantly (p?0.05) higher seed yield (1.33 t/ha) closely followed by the hybrids PAC-409 (1.23 t/ha) and Pusa Bold (1.21 t/ha). Seed yield showed significant (p?0.05) positive correlation with all the independent variables (plant height, R2=0.88; dry matter, R2=0.42; days to 50 % flowering, R2=0.27; number of siliqua/plant, R2=0.38; seeds/siliqua, R2=0.48; except number of fertile plants/m2, R2=-0.06; number of secondary branches/plant, R2=-0.97 and length of siliqua, R2=-0.07). However, number of secondary branches/plant had significant (p?0.05) and negative correlation with seed yield of mustard (R2=-0.97). Plant height revealed the highest degree of correlation (R2=0.88) with seed yield followed by siliqua per main branch (R2=0.77), days to harvest (R2=0.75) and 1000-seed weight (R2=0.52). The results indicated that selection of suitable rapeseed mustard cultivars based on these traits would be more effective in improving seed yield in mustard.
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