Coefficient of Variation, Inter-relationship and Heritability Estimates for Some Seedling Traits in Maize in C1 Recurrent Selection Cycle

Mehdi, Syed Sadaqat; Ahsan, Muhammad

doi:10.3923/pjbs.2000.181.182

Cited by 9 publications

(2 citation statements)

References 3 publications

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“…In 2019-2020, the total maize cultivation area was 1404.2 thousand hectares, while maize production was 7.88 million tonnes in Pakistan, contributing about 0.6% in Gross Domestic Production (GDP) [3]. Because of its accumulative significance, progress in the agronomic physiognomies of maize has received great reverence in Pakistan [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of K and Zn Application on Biometric and Physiological Parameters of Different Maize Genotypes

et al. 2021

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Potassium (K) and zinc (Zn) are mineral nutrients required for adequate plant growth, enzyme activation, water retention and photosynthetic activities. However, Pakistani soils are alkaline and have serious problems regarding Zn deficiency. The current study aims at finding the nutrient–nutrient interaction of K and Zn to affect maize plants’ (i) physiological processes and (ii) productivity. For this purpose, a pot experiment was conducted at the research area of the Department of Soil Science, Faculty of Agricultural Science and Technology, Bahauddin Zakariya University, Multan. Two maize genotypes, DK-6142 (hybrid) and Neelam (non-hybrid), were used with three K fertilizer doses, i.e., 0, 60 and 100 kg ha−1 in all possible combinations with three Zn fertilizer doses, i.e., 0, 16 and 24 kg ha−1. The treatments were replicated under a completely randomized block design. The results elucidated that the combined application of K and Zn with K60 + Zn16 treatment significantly increased agronomic, productive, and physiological attributes. It has improved fresh biomass (89%), dry biomass (94%), membrane stability index (142%), relative water content (200%) and chlorophyll contents (191%) as compared to the control. Moreover, the mineral uptake of K and Zn was significantly improved with their maximum fertilization rate in hybrid genotype compared to non-hybrid and CK.

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Section: Introductionmentioning

confidence: 99%

Effect of K and Zn Application on Biometric and Physiological Parameters of Different Maize Genotypes

et al. 2021

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“…K helps the crop plants to maintain turgor pressure, membrane stability and antioxidant enzymes activation to survive the hazard of saline environment (Cherel, 2004) and besides potassium is also crucial for plant metabolism (synthesis of proteins and osmotic adjustment). Keeping in view these factors an experiment was designed to compare the efficiency of Ca ++ and K + in reducing the salinity hazards in maize which is an important cereal crop grown in Pakistan to meet the food requirements with yield averaging 3264 kg/ha and covering an area of more than 3 million hectares (Mehdi and Ahsan, 2000).…”

Section: Introductionmentioning

confidence: 99%

Alleviation of Salinity Hazards in Different Maize Genotypes Using Inorganic Ions (Ca++ and K+)

Suhaib¹,

Mujtaba

Munir³

et al. 2020

Pakistan Journal of Scientific & Industrial Research

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A hydroponic experiment was conducted to evaluate and compare the efficiency of Ca and K ions and different maize genotypes with imposed salinity. Two levels of K+ and Ca++ (5 and 10 mM) each were tested on two maize genotypes (Pioneer-3335 and Syngenta-8441) under 100 mM NaCl stress. Saline treatment adversely affected the plant physiological parameters and disturbed the ionic balance and resulted in poor plant growth. However, Syngenta-8441 was more prone to salt stress as compared to Pioneer-3335. Both of the inorganic ions showed significant effects on physiological and ionic components of both genotypes. Among the inorganic ions K was found to be more efficient than Ca in improving the plant growth. Improved physiological and ionic traits were observed more significant with 10 mM K ion treatment followed by 5 mM K. Among Ca treatments higher level of Ca (10 mM) showed more significant results as compared to 5mM Ca++. This study revealed that Ca++ and K+ both are compulsory for maintaining the crop growth because of their mutual effects under salt stress. However, the alleviative efficiency of K is far better than Calcium but its (Ca++) role could not be neglected, while regarding genotypic differential response imposes the fact that Pioneer-3335 is more tolerant to salinity menace as compared to Syngenta- 8441 but both of the genotypes were significant in their recovery from stress to applied Ca++ and K+.

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Mapping QTL controlling maize deep-seeding tolerance-related traits and confirmation of a major QTL for mesocotyl length

Zhang

Zhao

et al. 2011

Theor Appl Genet

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Deep-seeding tolerant seeds can emerge from deep soil where the moisture is suitable for seed germination. Breeding deep-seeding tolerant cultivars is becoming increasingly important in arid and semi-arid regions. To dissect the quantitative trait loci (QTL) controlling deep-seeding tolerance traits, we selected a tolerant maize inbred line 3681-4 and crossed it with the elite inbred line-X178 to generate an F(2) population and the derivative F(2:3) families. A molecular linkage map composed of 179 molecular markers was constructed, and 25 QTL were detected including 10 QTL for sowing at 10 cm depth and 15 QTL for sowing at 20 cm depth. The QTL analysis results confirmed that deep-seeding tolerance was mainly caused by mesocotyl elongation and also revealed considerable overlap among QTL for different traits. To confirm a major QTL on chromosome 10 for mesocotyl length measured at 20 cm depth, we selected and self-pollinated a BC(3)F(2) plant that was heterozygous at the markers around the target QTL and homozygous at other QTL to generate a BC(3)F(3) population. We found that this QTL explained more phenotypic variance in the BC(3)F(3) population than that in the F(2) population, which laid the foundation for fine mapping and NIL (near-isogenic line) construction.

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Coefficient of Variation, Inter-relationship and Heritability Estimates for Some Seedling Traits in Maize in C1 Recurrent Selection Cycle

Cited by 9 publications

References 3 publications

Effect of K and Zn Application on Biometric and Physiological Parameters of Different Maize Genotypes

Effect of K and Zn Application on Biometric and Physiological Parameters of Different Maize Genotypes

Alleviation of Salinity Hazards in Different Maize Genotypes Using Inorganic Ions (Ca++ and K+)

Mapping QTL controlling maize deep-seeding tolerance-related traits and confirmation of a major QTL for mesocotyl length

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