8-2-8 COMPARING MODERN VARIETIES OF WHITE MAIZE WITH LOCAL RACES: EAR CHARACTERS


COMPARING MODERN VARIETIES OF WHITE MAIZE WITH LOCAL RACES: EAR CHARACTERS

Md. Jafar Ullah*, M. M. Islam, Kaniz Fatima, M. S. Mahmud, Jamilur Rahman and S. Akhter
*Corresponding author: jafarullahsau@gmail.com

Abstract
Two experiments were carried out, one initiating in Feb 05 with three modern white maize varieties (plough-01, plough-02 and Suvra) and the another with five local land races (red, black, yellow, purple and white) under two consecutive sowing dates (March 5 and 20) of 2015 at Sher-e-Bangla Agricultural university in Bangladesh to evaluate and compare cob characters. Across the trials the cob length, cob circumference, length of the vacant ear tip, number of seed rows and seeds per cob respectively were in the range of 8.66-20.11, 8.93-19.11, 2.6-8.26 cm, 8.0-16.2 and 132-486. Plough 201 (20.11 cm) produced the longest while the later sown local ‘black’ produced the shortest cobs (8.66 cm).  Plough 201 had the highest number of seed per cob (486), while Suvra had the highest seed rows (14) and the least number of seeds per cob (346). Across and among the local landraces the early sown crops had higher values in all the parameters of cob. The thickest cobs (14.56 cm circumference) were found in the early sown local white while more number of seeds per cob was seen in the early sown local black (259). Across the trials, the dry weights in cobs, seed, shell and husk ranged in 12.77-68.96, 1.64-55.76, 4.34-8.65 and 3.2-6.86 g respectively. The highest weight of cob was obtained with Suvra (68.96 g) and that of the seed in both Plough-202 and Suvra (54.21 and 55.76 g respectively). However, Suvra had the maximum shell and husk dry weight (6.8 and 6.4 g respectively). The dry weight per cob of the local maize was in a range of 21.95 to 28.90 g. The early sown local black and local purple had identical showing significantly higher cob dry weights (38.6-39.51 g) than other local landraces.



Keywords: local landraces of maize, modern maize, hybrid, nutrition, yield, vegetative growth

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