Breeding potential of maize germplasm populations to improve yield and predominant heterotic pattern in Northeast China

Yong, Hongjun; Zhen-guo, Jin; Gao, Li; Lin, Zhang; Liu, Xianjun; Zhang, Fangjun; Zhang, Xiaocong; Zhang, Degui; Li, Mingshun; Weng, Jianfeng; Zhang, Hao; Zhang, Shihuang; Li, Xinhai

doi:10.1007/s10681-017-2013-2

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…With the economic growth and consumption rising, demand for maize is projected to increase 47% to 2030 [7,8]. Additionally, more notably, major advances in the expansion of maize production have occurred over the past four decades through genetic improvements that enhance disease and pest resistance [9][10][11]. Since the majority of maize production systems in China are limited from low nutrient use efficiency and imbalanced fertilization [1,2], it is essential to optimize nutrient application for improving maize production.…”

Section: Introductionmentioning

confidence: 99%

Responses to Potassium Application and Economic Optimum K Rate of Maize under Different Soil Indigenous K Supply

et al. 2018

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Potassium (K) is an essential macronutrient for maintaining crop productivity, but the economic benefit of K fertilizer often has been neglected. We collected a database from 60 maize field experimental sites in Northeast China between 2005 and 2012 to study the impacts of potassium (K) application rates on yield, K concentrations in grain and straw, plant K uptake, and to evaluate the economic optimum K rate (EOKR) for maize under different levels of soil indigenous K supply (IKS). The results showed that the average maize yield in K rec treatment (the recommended K rate) was highest and was 32.1% higher than that in K 0 treatment (no K fertilization). Compared to K 0 , the application of K did not significantly increase grain K concentration, whereas it significantly increased K concentration in the straw. Plant K uptake in K 150 treatment (150% of the recommended K rate) was higher than that in K rec treatment, but grain yield was lower than that in K rec treatment. Thus, the result indicates that luxury K absorption occurred in K 150% treatment due to excessive K application. Thus, the application rate of K should be further optimized. Based on the modified Mitscherlich model, the average economic optimum K rate (EONR) was 135.24, 124.27, and 96.54 kg K 2 O/ha for the low, medium, and high levels of soil indigenous K supply (IKS), respectively. The average economic optimum yield (EOY) at a high IKS level was similar to the average yield in K rec treatment, whereas the EOKR could reduce by a K rate of 37.9-63.7 kg K 2 O/ha compared to K rec treatment. This study highlights the importance of K application to improve grain yield and provides a promising fertilizer recommendation method for minimizing fertilizer inputs and optimizing maize production.

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Section: Introductionmentioning

confidence: 99%

Responses to Potassium Application and Economic Optimum K Rate of Maize under Different Soil Indigenous K Supply

et al. 2018

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“…The current study improving grain yield and nutritional value of quality protein maize to identify suitable hybrids for further selection and breeding. Many researchers have also reported significant variations among genotypes, environments and their interactions for yield,yieldrelated traits and quality traits in maize [23][24][25][26][27]. Line by location, tester by location, and line × tester by location line tester and line × tester main effects were significant for most traits.…”

Section: Discussionmentioning

confidence: 96%

Understanding the genetics of important traits in quality protein maize (Zea maysL.) by Line × Tester analysis

Bharti

Dubey

Kumar

et al. 2020

Preprint

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Maize (Zea mays L.) is among the top ten most valuable crops and livestock products. Maize demand and production are continuously rising. The nutritionally rich quality proteins maize (QPM) has almost two times as much lysine as well as tryptophan, amino acids which then the conventional maize varieties. In this study, genetics of important traits in quality protein maize were determined using a Line by Tester matting design. The 45 hybrids were obtained via Line by Tester crossing of 15 lines and 3 testers. The parents and their hybrids were evaluated under two environments. A significant amount of variation was recorded for most of the traits studied. Parental genotypes L2, L6, T2, L8, L7 and L14, exhibited negative and considerable general combining ability (GCA) effects for days to flowering and maturity. L7 × T2, L13 × T3, L10 × T1, L1 × T1, L9 × T2, L5 × T1, L12 × T2, L11 × T3, L10 × T3, L14 × T1 and L6 × T1 were identified with suitable yield and component traits. Crosses L5 × T1, L3 × T1, L12 × T2, L7 × T3, L1 × T2 and L13 × T1 were identified for quality traits. Heterosis over the mid parent crosses L13 × T1 showed highest negative and significant followed by L6 × T1, L12 × T2, L14 × T2 and L2 × T1 for days to 50 per cent tasselling. A significant correlation for the lysine content was determined between F1 mean and specific combining ability (SCA) effects. Overall, this work provides the useful insights into the genetics of important agronomical and biochemical traits of quality protein maize.

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Breeding potential of inbred lines derived from five maize (Zea mays L.) populations

et al. 2018

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Breeding potential of maize germplasm populations to improve yield and predominant heterotic pattern in Northeast China

Cited by 6 publications

References 30 publications

Responses to Potassium Application and Economic Optimum K Rate of Maize under Different Soil Indigenous K Supply

Responses to Potassium Application and Economic Optimum K Rate of Maize under Different Soil Indigenous K Supply

Understanding the genetics of important traits in quality protein maize (Zea maysL.) by Line × Tester analysis

Breeding potential of inbred lines derived from five maize (Zea mays L.) populations

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