Assessment of hybrids of drought tolerant maize (Zea mays L.) inbred lines for grain yield and other traits under stress managed conditions

Nigerian Journal of Genetics Pub Date : 2014-07-01 DOI:10.1016/j.nigjg.2015.06.004

Moses A. Adebayo , Abebe Menkir

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引用次数: 34

Abstract

Introduced maize (Zea mays L.) germplasm can serve as important sources of favorable alleles for enhancing the performance of new maize varieties and hybrids under drought stress conditions. Ninety-six elite maize hybrids alongside four hybrid checks were evaluated for grain yield and other agronomic traits under managed stress conditions over two seasons at Ikenne, Nigeria. Hybrids differed significantly for grain yield and other measured traits under both drought stress and well-watered conditions. Grain yield varied from 444 to 3022 kg ha⁻¹ under drought stress, and from 3827 to 8887 kg ha⁻¹ under full irrigation. Drought stress reduced grain yield by 70%. Each of the top 10 yielders under drought stress produced >2500 kg ha⁻¹ and had a yield advantage of >10% over the best check. Three hybrids namely; ADL47 × EXL15, ADL41 × EXL15 and EXL02 × ADL47, produced competitive yields under both irrigation treatments.

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抗旱玉米(Zea mays L.)自交系杂交种在胁迫条件下的产量及其他性状评价

引种玉米(Zea mays L.)种质资源可以作为提高玉米新品种和杂交种在干旱胁迫条件下性能的有利等位基因的重要来源。在尼日利亚Ikenne，对96个优良玉米杂交种和4个杂交种在管理胁迫条件下的籽粒产量和其他农艺性状进行了两个季节的评价。在干旱胁迫和水分充足的条件下，杂交种在籽粒产量和其他测量性状上均存在显著差异。干旱胁迫下的产量为444 ~ 3022 kg ha - 1，全灌条件下的产量为3827 ~ 8887 kg ha - 1。干旱胁迫使粮食减产70%。在干旱胁迫下，产量最高的10个品种的产量均为2500公斤/公顷，产量比最佳对照高出10%。三个杂种，即;ADL47 × EXL15、ADL41 × EXL15和EXL02 × ADL47在两种灌溉处理下均具有竞争力。

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Nigerian Journal of Genetics

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