Studies on Effective Methods for Synchronization of Flowering in Parents of DMH-2 Hybrid Maize
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Date
2011
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Publisher
UAS, Dharwad
Abstract
The present investigation was carried out to study the influence of seed
treatment with hydration, gibberellic acid and soil application of additional nitrogen in
combination with urea spray to female parent (CI-4) and only Abcisic acid seed
treatment to male (KDMI-10) on synchronization of flowering between the parental
lines, seed yield and quality of hybrid maize DMH-2 at MARS, UAS Dharwad during
kharif 2010.
Female parent flowered late by six days than male with simultaneous sowing.
Among the different techniques to achieve synchronization of flowering, pre sowing
seed hydration(6hrs) + 10 % additional N soil application to female parent resulted in
better synchronization of flowering (1.34 days) and resulted in significantly highest
seed yield (38.33 q/ha) over simultaneous sowing control (23.07 q/ha). This treatment
also hastened the first flowering in female parent (47.33 days) and increased the cob
length, cob weight (163.00 g/ plant), number of seeds rows per cob (14.00), seed
weight per cob (132.07 g), seed set % (96.45), 100 seed weight (29.79 g) and fodder
yield (3.33 q) compared to other treatments.
The results of another field experiment conducted during 2010-11, to study the
effect of time of sowing on flowering behavior of parental lines of DMH-2 maize
hybrid revealed that, sowing dates influenced the flowering behavior of the parental
lines. Sowing in mid July caused early initial and 50% flowering by 4 days and 3 days
between female and male parents respectively and the difference was gradually
increased up to January 1st sowings. None of the sowing did not give cent per cent
synchrony and the flowering difference (50%) ranged from 3 to 11 days during June
1st 2010 to January 15th 2011 under Dharwad condition.
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Keywords
Seed Science and Technology