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Comparative Study Between Water Logged and Normal Maize Hybrids Developed Through Diallel Fashion

M.N. Amin
Scientific officer
Plant Breeding Division, BARI, Gazipur

M. Amiruzzaman
Principal Scientific officer
Plant Breeding Division, BARI, Gazipur

Abstract/ Executive Summary:

Twenty eight hybrids obtained from a 8×8 diallel cross of medium waterlog tolerant inbred lines evaluated through cup screening and in the field both waterlog and normal condition at Joydebpur during 2012-13 for identification and development of waterlog tolerant hybrids. In general waterlogged condition reduced over all plant growth, delays flowering and reduced maize grain yield to a considerable extent however there is a in built tolerance ability in some genotypes where the symptoms of water logging are not much pronounced. Parents E-31 and E-58 showed significant positive gca could be used for obtaining high yielding hybrids. In cup screening, E-31× E-64, E-38×E- 64, E- 40× E 63 and E-63×E-64 showed much sound plant growth under waterlogged condition than normal. On the other hand field screening. E-31×E-5 and, E-38×E-58 showed stable performance incase of yield than others

Keywords: Water logged maize hybrid , Normal maize hybrids, Diallel fashion

Location: Joydebpur

Start Date: 11-11-2012

End Date: 28-04-2013

Program Area: Variety and Species

Commodity: Maize

Objectives:

To quantify the effects of water logging in different maize genotypes
To screen the elite maize genotypes for their reaction to temporary water logging conditions
To identify the morphological/ physiological trait conferring tolerance to water logging

Methodology:

28 single crosses were made through 8×8 diallel fashion using medium waterlog tolerant lines (previously selected) were studied for both cup screening and field screening (waterlog and normal condition) at Joydebpur during 2012-13 at Bangladesh Agricultural Research Institute, Gazipur. For Cup screening experiment disposable plastic cups perforated at the base at three points with an orifice of 5 mm diameter were used to grow the maize seedlings. Soil was initially sieved through a mesh with a fine mesh size, then, FYM and chemical fertilizers (NPK) calculated on soil weight basis and thoroughly mixed in the soil. It was ensured by weighing that equal quantity of soil is maintained in each cup in order to maintain a same moisture level in each cup. Filled cups were put in a plastic tray containing up to 5 cm of water. It is necessary to maintain a constant level of water in each tray, so due consideration was given to this aspect. Total soil in the cups got saturated with the water entering from the holes present at the base of cups through capillary action

Source of Information: Annual Research Report 2012-2013, Plant Breeding Division, BARI

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 10,000

Total Budget (Tk.) : 10,000

Achievement/Findings:

In cup screening, E-31× E-64, E-38×E- 64, E- 40× E 63, E-63×E-64 showed very sound plant growth under waterlogged condition. In field screening, E-31×E-58 and E-38×E-58 showed stable performance incase of yield than other entries. One of the most difficult problems for the breeding of flooding tolerant crops is that the varietal ranking for the trait is constantly changing with the growth stages. In addition, when the comparison is made at a particular similar growth stage, it is difficult to select reliable tolerant lines since multiple factors related to flooding. In addition to conventional breeding, marker-assisted selection (for in quantitatively inherited traits such as flooding tolerance) may be useful for varietal improvement.

Knowledge Management: Report/Proceedings