Evaluation of S1 Maize (Zea mays L.) Families at Seedling 
Stage under Drought Conditions

Mehdi, Syed Sadaqat; Ahmad, Nadeem; Ahsan, Muhammad

doi:10.3923/jbs.2001.4.6

Cited by 11 publications

(4 citation statements)

References 10 publications

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“…Higher shoot length suggests that higher crop biomass may be produced due to more water content, and an inbred line with a higher shoot length may be selected for fodder breeding as well as for quantitative traits. Similar results have been reported by Mehdi et al (2001). Several crosses in this trial led to substantial genetic advance, particularly under drought conditions (Tables 1 and 2 Pandey et al (2000) reported that increasing moisture stress was the major cause of decreases in crop growth rate, leaf area, shoot dry matter, plant height and harvesting index.…”

Section: Discussionsupporting

confidence: 73%

Combining ability analysis for evaluation of maize hybrids under drought stress

Malook¹,

Ali²,

Ahsan³

et al. 2016

J. Natn. Sci. Foundation Sri Lanka

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The present study was conducted to evaluate the genetic basis of yield related traits under drought conditions. A high heritability and genetic advance was found for plant height, 100-grain weight, grain rows per cob and grain yield per plant, suggesting that the selection of high yielding maize genotypes is possible through this approach. The high specific combining ability of W64SP, A495, A509 and A50-2 suggested that the pre-screening of inbred lines may be an efficient approach to develop higher yielding maize hybrids through heterosis breeding under drought. Keywords:Combining ability, drought, genetic advance, heritability, heterosis, Zea mays. INTRODUCTIONMaize (Zea mays) is an important cereal crop worldwide and is ranked third after wheat and rice for its nutritional quality and uses (Cassamon, 1999;Ali et al., 2014a;b). It is a monoecious and highly cross pollinated crop mostly used as food, feed, forage, green fuel (ethanol), vegetable oil and starch and is the backbone of the poultry feed industry. Maize grain constitutes about 9.74 % grain protein, 4.85 % grain oil, 9.44 % grain crude fibre, 71.97 % grain starch, and 11.77 % embryo, while fodder contains 22.98 % acid detergent fibre, 51.69 % neutral detergent fibre, 28.797 % fodder cellulose, 40.18 % fodder dry matter, 26.85 % fodder crude fibre, 10.35 % fodder crude protein and 9.09 % fodder moisture (Ali et al., 2014 b;c;Saif-ul-Malook et al., 2014a;b;c under maize cultivation with 30 % of the total produce in Pakistan. The major share belongs to Sindh and KPK with 56 % area and 63 % production, respectively. The average production of maize in Pakistan is 3672 kg/ha, which is very low compared to other countries (Anonymous, 2012(Anonymous, -2013.

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Section: Discussionsupporting

confidence: 73%

Combining ability analysis for evaluation of maize hybrids under drought stress

Malook¹,

Ali²,

Ahsan³

et al. 2016

J. Natn. Sci. Foundation Sri Lanka

Self Cite

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“…The present study confirmed this inspiration, for instance, the inbred line KUBA/GUDAC1ï¿½ has 62 ears and provided a grain yield of 4.3 t ha -1 , whereas an inbreed line A7033 has 50 ears but offered 8.3 t ha -1 (Table 1). This result also agreed with the investigation of Mehdi et al (2001) and Taimur et al (2011) attained a smaller amount of coefficient of variation for several traits in maize and conferring to Singh and Chaudhry (1997), 10% or less CV are acceptable for selection of traits in improving the program for the population. Days to 50% pollen shedding for maize hybrids ranged from 62 to 76 (Table 1).…”

Section: Resultssupporting

confidence: 89%

Genetic variability, heritability, trait associations and path coefficient analysis of maize (Zea mays L.) inbreed lines

Damtie,

Assefa,

Mulualem

2021

J. Current Opinion Crop Sci.,

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Maize (Zea mays L.) is the first most vital cereal share for the productivity, but the second in its production area coverage next to tef, in Ethiopia. However, its development and productivity are influenced by biotic and abiotic factors. The absence of tolerant maize verities and or inbreed lines also another significant problem. Therefore, the present study was targeted to assess the magnitude of genetic variability, heritability and genetic advance of traits, to verify the genotypic and phenotypic associations between essential characteristics and determine the relationship of features with grain yield and direct and indirect effects using path coefficient analysis. The experiment was conducted at Pawe Agricultural Research Center using 23 inbred lines with RCB design with 3 replications. Results revealed that significant (P<0.01) variations were observed between inbred lines in yield and yield-related traits. Moderate to the high genotypic coefficient of variation, heritability and genetic advance as the percentage of mean values were recorded for plant height, ear height and grain yield. Plant height, ear height and number of ears were observed significant to highly significant positive phenotypic and genotypic associations with grain yield. In contrast, days to 50% anthesis and silk emergence, plant and ear aspects were showed negatively significant associations with grain yield at both genotypic and phenotypic levels. The highest grain yield was recorded from A7033 (8.3 t ha-1), CML197 (6 t ha-1) and CML202 (5.5 t ha-1) and these lines could be best female parents’ foe crop maize improvement programs.

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“…Root dry weight has the potential to be an important trait for selection against water stress (Mehdi et al 2001). This study also confirmed the association between Tolerance and RDW (Table 3).…”

Section: Discussionsupporting

confidence: 82%

Association Study for Drought Tolerance of Flint Maize Inbred Lines Using SSR Markers

Jin

Park

et al. 2022

Plant Breed. Biotech.

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Drought tolerance is derived from complex quantitative traits that are associated with different shoot and root morphological characters. This study assessed the genetic and phenotypic variation of 12 maize inbred lines and performed association analysis of 11 drought-related traits using 360 simple sequence repeats (SSRs), detecting 1,604 alleles, with an average of 4.4 alleles per locus. The average values of gene diversity (GD) and polymorphism information content (PIC) were 0.648 and 0.598, respectively. In principal component analysis (PCA), shoot fresh weight (SFW), shoot dry weight (SDW), stem weight (SW), leaf weight (LW), root fresh weight (RFW), root dry weight (RDW), and leaf area (LA) traits contributed greatly to the PCA. Association analysis was performed using a general linear model with a Q-matrix (Q GLM) and a mixed linear model with Q and K-matrices (Q + K MLM). Twelve SSR markers for drought tolerance trait were detected by Q GLM, and all maize inbred lines were clearly divided into two groups in accordance with their drought tolerance. Duplicated significant marker-trait associations (SMTAs) between Q GLM and Q + K MLM identified eight marker-trait associations involving four SSR markers that were associated with the traits of SW, SFW, RFW, and RDW with a significant level of P < 0.05. The umc1175 and umc2092 were associated with SW and SFW; umc1503 was associated with RFW, SFW, and SW; and umc2341 was associated with RDW. The detection of loci associated with drought-related traits in this study may provide better opportunities to improve maize drought tolerance by marker-assisted selection (MAS).

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Evaluation of S1 Maize (Zea mays L.) Families at Seedling Stage under Drought Conditions

Cited by 11 publications

References 10 publications

Combining ability analysis for evaluation of maize hybrids under drought stress

Combining ability analysis for evaluation of maize hybrids under drought stress

Genetic variability, heritability, trait associations and path coefficient analysis of maize (Zea mays L.) inbreed lines

Association Study for Drought Tolerance of Flint Maize Inbred Lines Using SSR Markers

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