Genetic diversity and path analysis for nitrogen use efficiency in popcorn inbred lines

Mundim, Gabriel Borges; Viana, José Marcelo Soriano; Maia, Ciro; Paes, Geísa Pinheiro; DeLima, Rodrigo Oliveira

doi:10.1007/s10681-012-0855-1

Cited by 13 publications

(20 citation statements)

References 27 publications

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“…Mundim et al. () were able to identify popcorn inbred lines that were efficient and inefficient in nitrogen (N) use, and they recommended specific crosses for generating breeding populations with high N use efficiency and segregating populations for QTL analysis. In maize ( Z. mays L.), DoVale et al.…”

Section: Discussionmentioning

confidence: 99%

Early evaluation of popcorn inbred lines for phosphorus use efficiency

2013

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Phosphorus use efficiency (PUE) evaluation based on shoot dry weight in the early stages of plant development can be a useful measure to identify genotypes that are superior in phosphorus (P) use. The objectives of this study were to (i) identify inbred lines that are efficient and inefficient in P use, (ii) assess the genetic diversity among the inbred lines based on traits related to PUE, (iii) investigate the relationship among traits related to PUE and its components and (iv) estimate the expected responses to selection for increasing PUE. Twenty-three S 6 popcorn inbred lines were evaluated under high and low P, and several traits related to PUE and its components were measured. Efficient and inefficient inbred lines under each P level were identified, and the genetic diversity assessment grouped these inbred lines in opposite clusters. Phosphorus acquisition efficiency (PAE) was the most important component of PUE in the early stages of plant development, and the direct selection for PAE seems to be the best method for increasing PUE in these stages.

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Section: Discussionmentioning

confidence: 99%

Early evaluation of popcorn inbred lines for phosphorus use efficiency

2013

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“…Path analysis has been widely used in the breeding of crops such as açai palm (Singh et al, 2005;Espósito et al, 2012;Teixeira et al, 2012) and popcorn (Mundim et al, 2013). However, relatively little use of the method has been made in sweet sorghum (Kumar et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Path analysis of agro-industrial traits in sweet sorghum

Lombardi¹,

Nunes²,

Parrella³

et al. 2015

Genet. Mol. Res.

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ABSTRACT. Sweet sorghum has considerable potential for ethanol production due to its succulent stalks that contain directly fermentable sugars. Since many traits need to be considered in the selection process to breed superior cultivars for ethanol production, then correlations between the traits might be of use to help the breeder define optimal improvement strategies. The aim of this study was to investigate the association between the principal agro-industrial traits in sweet sorghum, and to evaluate the direct and indirect effects of primary and secondary traits on ethanol production per hectare. In total, 45 sweet sorghum genotypes (lineage/ hybrids) were evaluated in an experiment designed in an alpha lattice 5 x 9. The data were analyzed using a mixed model approach. A detailed study of simple correlations was accomplished using path analysis. The experimental precision was high, with an accuracy above 76%. The various genotypes showed genetic variation for all agronomic and industrial traits, except stalk diameter. Some agro-industrial traits showed significant simple 16393 Path analysis in sweet sorghum ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 14 (4): 16392-16402 (2015) correlations with ethanol production, but according to the path analysis, some of these traits did not show a significant direct or indirect effect on ethanol production. The results highlighted the primary and secondary traits with practical relevance to sweet sorghum breeding, since they showed director indirect effects on ethanol production.

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“…Thirteen of the 19 inbred lines were previous assessed by Mundim et al. () for NUE and root traits at vegetative stage V6 under two contrasting N levels. Data for N uptake efficiency (NUpEV = N in plant/N applied, mg/mg) and N utilization efficiency (NUtEV=shoot dry weight/N in the plant, mg/mg), total root length (TRL, cm) and root dry weight (RDW, mg) were recorded.…”

Section: Methodsmentioning

confidence: 99%

“…Because several traits affect NUE variation, many multivariate studies aiming to study the genetic diversity of maize germplasms have been performed. Mundim, Viana, Maia, Paes, and DeLima () evaluated a set of tropical popcorn inbred lines for NUE and shoot and root traits under contrasting N levels. Based on the squared Euclidean distance, they concluded that the inbred lines with high NUE were grouped in the same cluster.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have also described the variation of root traits and early vegetative N efficiency indexes under various levels of N (Kondo et al., ; Wang, Mi, Chen, Zhang, & Zhang, ; Mundim et al., ; Mundim, Viana, Delima, & Almeida, ). However, only a few studies associating early vegetative and adult plant traits in response to contrasted N conditions have been performed.…”

Section: Introductionmentioning

confidence: 99%

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Genetic diversity and path analysis for nitrogen use efficiency of tropical popcorn (Zea maysssp.everta) inbred lines in adult stage

et al. 2018

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Modern maize hybrid breeding is also focused on increasing nitrogen use efficiency (NUE) for grain production. The objectives of this study were to assess popcorn inbred lines for NUE, assess its genetic diversity for NUE and related traits, and investigate the relationship between vegetative and adult traits with NUE, under contrasting N levels. Nineteen inbreds were assessed for NUE and related traits under two contrasting N levels in a 2-year experiment, using complete blocks with three replications. Path analysis was performed using the vegetative N uptake and utilization efficiency and two root traits and four adult traits. The inbred 05-388 was the most efficient in N use under both N levels. The inbreds with higher N use and utilization efficiency, grain N content and post-silking N uptake were allocated in the same cluster in both N conditions. Leaf chlorophyll content and post-silking uptake can serve as target traits for identifying superior inbred lines for NUE. Vegetative N uptake and utilization efficiency, and total root length can be used for early selection of superior NUE inbreds. K E Y W O R D Sabiotic stress, leaf chlorophyll content, N dynamic, nitrogen use efficiency, root traits

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Genetic diversity and path analysis for nitrogen use efficiency in popcorn inbred lines

Cited by 13 publications

References 27 publications

Early evaluation of popcorn inbred lines for phosphorus use efficiency

Early evaluation of popcorn inbred lines for phosphorus use efficiency

Path analysis of agro-industrial traits in sweet sorghum

Genetic diversity and path analysis for nitrogen use efficiency of tropical popcorn (Zea maysssp.everta) inbred lines in adult stage

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