Genetics of Physio-Agronomic Traits in Maize under Water Deficit Conditions

Wattoo, Fahad Masoud; Saleem, Muhammad Farrukh; Ahsan, Muhammad; Basra, S. M. A.

doi:10.3923/pjn.2013.398.409

Cited by 5 publications

(10 citation statements)

References 18 publications

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“…Estimation of the components of variation showed that a greater proportion was due to GCA variance (σ 2 g) than SCA variance (σ 2 s) expressing additive genetic effects for leaf temperature (Table 2). These results are consistent with those of Chohan (2012) and Wattoo (2013) who reported additive genetic effects for this trait. However, they differ from those of Hussain (2009) who suggested greater SCA variance than GCA variance and indicated the importance of non-additive effects for leaf temperature.…”

Section: Analysis Of Leaf Temperature Variationssupporting

confidence: 93%

“…GCA variance (σ 2 g) was larger than SCA (σ 2 s) showing the predominance of additive genetic effects (Table 2). These results are consistent with those of Hussain (2009), Chohan (2012, and Wattoo (2013) who demonstrated that this trait was controlled by additive gene action.…”

Section: Analysis Of Anthesis-silking Interval Variationsupporting

confidence: 92%

“…The results are in agreement with those of Malik et al (2004), Rezaei et al (2005), and Hussain (2009). Plant height has previously been reported to be under the control of additive and non-additive gene effects (Bello and Olaoye, 2009;Chohan, 2012;Wattoo, 2013).…”

Section: Analysis Of Plant Height Variationmentioning

confidence: 99%

“…In Pakistan, maize is the third most important cereal crop after wheat and rice; it is cultivated on an area of over 1 million hectares and has an annual production of approximately 4.6 million tons and an average yield of about 4268 kg/ha (Anonymous, 2012(Anonymous, -2013. Globally, maize is grown on 175.93 million ha with a total grain production of 862.85 million metric tons (USDA-FAS 2012-2013. The major corn-producing areas are the United States, China, the European Union, Brazil, Mexico, and India (USDA/FAS /GRAIN 2012-2013).…”

Section: Introductionmentioning

confidence: 99%

“…Since water availability has a key role in crop production, there is considerable interest in breeding varieties that are tolerant of water deficits (Edmeades, 2008). Water stress affects plant height, leaf temperature, days taken to tasseling, days taken to silking, ASI, number of kernels per ear, 100 grain weight, grain yield per plant, number of kernels per row, ear height, relative leaf water content, and number of ears per plant (Tabassum et al, 2005;Akbar et al, 2008;Chohan, 2012;Wattoo, 2013). …”

Section: Introductionmentioning

confidence: 99%

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Genetic analysis of water-deficit response traits in maize

Ahmad

Saleem

Ahsan³

et al. 2016

Genet. Mol. Res.

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ABSTRACT.A set of sixty inbred lines of maize (Zea mays L.) were screened in the greenhouse at the seedling stage under both normal and water-deficit conditions. Six water deficit-tolerant inbred lines were selected based on root to shoot ratios. These selected lines were crossed in a diallel pattern. The parental, F 1 , and reciprocal cross plants were planted in a field under both normal and water-deficit conditions. Normal irrigation was applied to the control set, while the water-deficit set received 50% of normal irrigation levels. Analyses of variance of various morphophysiological parameters identified significant differences among the selected lines under both conditions, indicating the presence of significant genetic variability. Variance components for general combining ability (GCA), specific combining ability (SCA), and reciprocal effects for all the parameters were estimated to determine the relative importance of additive and non-additive or dominance type of gene action. Variance components for GCA were larger than for SCA indicating the preponderance of additive types of gene action for all the traits under study. Hybrids developed from inbred lines W-10 and W-64SP proved to have the best grain yield under normal and water-deficit conditions. Under water-deficit conditions, the best performing cross was B-34 x W-10. Hence, these inbred lines and the hybrids might be of value in future breeding programs.

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Section: Analysis Of Leaf Temperature Variationssupporting

confidence: 93%

Section: Analysis Of Anthesis-silking Interval Variationsupporting

confidence: 92%

Section: Analysis Of Plant Height Variationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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