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Evaluation of Single Cross Hybrids for High Yielding Maize

Shahnewaz Begum
Scientific Officer
cientific Officer,

Sumaiya Haque Omy
Scientific Officer
Plant Breeding Division, BARI, Gazipur

Asgar Ahmed
Scientific Officer
Plant Breeding Division, BARI, Gazipur

Dr. Mohammad Amiruzzaman
Principal Scientific Officer
Plant Breeding Division, BARI, Gazipur

Abstract/ Executive Summary:

An experiment was carried out at joydebpur during rabi 2013-14 with 19 locally developed single cross maize hybrids and 3 checks viz, BHM 9, 900M and BHM 7 to test the performance of locally developed hybrid and select better one(s). Three crosses 900M/S₄-12×BIL-28, 900M/S₄-2×BIL-110 & 900M/S₄-12×BIL-110 showed numerically higher yields than all check varieties. Among the check BARI Hybrid Maize 9 (BHM 9) produced higher yield. Highly significant negative heterosis for plant and ear height and highly significant positive heterosis for ear diameter, row per ear and kernel per row was observed in the cross 900M/S₄-12×BIL-110.

Keywords: Evaluation, Single cross, Maize hybrids

Location: BARI, Gazipur

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Variety and Species

Commodity: Maize

Objectives:

To develop high yielding hybrids locally.

Methodology:

The experiment was conducted at Joydebpur during rabi 2013-14 with 19 single cross hybrids and 3 checks viz. BHM 9, 900M and BHM 7 following RCB design with 2 replications. Sowing was done at 26 November 2013. The unit plot size was 2 rows 5 m long maintaining spacing 75 cm from row to row and 20 cm from plant to plant. All intercultural operations and fertilizers were applied as recommended doses. Data were recorded on days to tasseling and silking, plant height (cm), ear height (cm), ear length (cm) and diameter (cm), number of rows per ear, number of kernels per ear, 1000-grain weight (g) and yield (kg/plot). Grain yield kg/plot was converted into yield t/ha. All recorded data were processed and analyzed statistically.

Source of Information: Annual Research Report 2013-14, Plant Breeding Division, BARI, page: 103-106

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Ten thousand taka only

Total Budget (Tk.) : Ten thousand taka only

Achievement/Findings:

Significant variations were observed among the hybrids for all the characters except 1000-grain weight. Significant negative heterosis is desirable in growth parameters for earliness and dwarf plant. Range of heterosis for days to tasseling and silking were -3.35 to 6.15% and -3.35 to 4.76% respectivel. Significant negative heterosis for these traits was found in only two hybrids each. Heterosis for plant & ear height ranged from -25.93 to 4.44% and -36.86 to 11.62%, respectively. Significant negative heterosis was found in 14 and 12 crosses out of 19 crosses for plant height and ear height, respectively that are desirable. For grain yield and yield component significant positive heterosis is desirable. Ranges of heterosis for ear length and ear diameter were -29.89% to 3.09% and -2.61% to 17.65%, respectively. Significant positive heterosis for ear length was observed in one cross (900M/S₄-12×BIL-28) and for ear diameter was observed in 14 crosses out of 19 crosses. For number of rows per ear, number of kernels per row and thousand grain weight heterosis ranged from -7.14 to 42.86%, -28.5 to 2.59% and -1.37 to 39.58% respectively. Significant positive heterosis for grain weight was shown by 16 cross. In case of grain yield, heterosis ranged from -39.38 to 6.91%. Highest significant positive heterosis was found in 900M/S₄-12×BIL-28 (6.91%) followed by 900M/S₄-12×BIL-110 (6.44%) and 900M/S₄-2×BIL-110 (4.06%). Results showed that among the hybrids three crosses (900M/S₄-12×BIL-28, 900M/S₄-12×BIL-110 and 900M/S₄-12×BIL-110) produced higher yield over the best check variety with sinificant positive heterosis

Knowledge Management: Report/Proceedings