Genetic diversity in elite inbred lines of maize and its association with heterosis

Fernandes, E H; Schuster, Ivan; Scapim, C.A.; Vieira, Elisa Serra Negra; Coan, Marlon Mathias Dacal

doi:10.4238/2015.june.12.3

Cited by 23 publications

(25 citation statements)

References 24 publications

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“…*Significant and ns = not significant according to the t-test (P < 0.05); GY = grain yield (t/ha); FF = female flowering (days); SD = stem diameter (cm); PH = plant height (m); EH = ear insertion height; GMY = green mass yield (t/ha); DMY = dry matter yield (t/ha); CP = crude protein (% of dry matter);NDIF = neutral detergent-insoluble fiber (% of dry matter); ADIF = acid detergent-insoluble fiber (% of dry matter). Fernandes et al (2015) verified the absence of genetic distance correlation among 48 elite corn lines using simple sequence repeat (SSR) molecular markers and the performance of hybrids. However, the authors suggest that extreme genetic distance data should be used for the choice of more promising crosses once the best hybrids have been obtained by the combination of lines with bigger genetic distances.…”

Section: Genetic Divergence and Correlationsmentioning

confidence: 82%

Genetic divergence among corn hybrids and combining ability for agronomic and bromatological traits of silage

et al. 2017

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ABSTRACT.We assessed the impact of genetic divergence and the ability to combine corn hybrids used for the production of silage on the agronomic and bromatological traits of silage quality. We evaluated 18 corn hybrids used as genitors in a circulant diallel scheme in which each genitor hybrid participated in 9 hybrid combinations, and evaluated 100 treatments [18 genitor hybrids, 81 diallelic hybrids, and a commercial check hybrid (DKB330)] in a triple lattice 10 x 10 experimental design in two environments in Brazil. Genetic variability 2 E. Gralak et al.Genetics and Molecular Research 16 (2): gmr16029643 was adequate among the corn silage hybrids, and we can recommend the use of genitors 2B688 and P30B39 for the formation of a base population for intrapopulational breeding. The P30P34 hybrid is the best for intrapopulational breeding when aiming for silage with high protein content, low fiber content, and higher in vitro digestibility. Interpopulational breeding directed at improving silage digestibility can use a combination of genitors P30P34 and AS1572, but AS1572 and P30K64 are the most recommended. Hybrids 2B688, P30P34, and SG6015 are considered the most genetically distant of the others hybrids, and have desirable combining potential; therefore, they are important genitors for the formation of new segregated populations for improving corn silage.

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Section: Genetic Divergence and Correlationsmentioning

confidence: 82%

Genetic divergence among corn hybrids and combining ability for agronomic and bromatological traits of silage

et al. 2017

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“…These coefficients indicate that there are high variations among the evaluated genotypes, which is of relevant importance for the beginning of improvement programs, considering that it is only possible to select superior genotypes and genetic gains when there is genetic variability [15].…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Maize Varieties for Grain Yield under Water-restricted Conditions

Almeida¹,

Valadares²,

Silva

et al. 2019

JEAI

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The study sought to evaluate maize germplasm accessions from the Ifes Germplasm Bank (Ifes BAG) to identify promising lines for breeding programs to increase yield under water-restricted conditions. A competition trial was carried in two contrasting environments in the state of Espírito Santo, Brazil: municipality of Alegre and municipality of Colatina. Twenty-one maize accessions were collected and evaluated for agronomic performance in two locations (The municipalities of Almeida et al.; JEAI, 39(4): 1-13, 2019; Article no.JEAI.49978 2 Alegre and Colatina) in Espírito Santo State, Brazil. Trials were conducted under water-restricted conditions from vegetative to reproductive stage in a randomized block design with five replicates. Data were subjected to analysis of variance by the F Test and to multivariate clustering analysis according to the estimate of genetic distance proposed by Mahalanobis. Genotype by environment interaction identified promising genotypes for each specific environment. Maize germplasm accessions from the Ifes BAG showed genetic variability. Among the germplasm accessions from the Ifes BAG, the populations Padrinho, Piranão 14, Aliança and Palha Roxa are promising for breeding programs with the goal of increasing grain yield under water-restricted conditions in tropical climate regions. Original Research Article

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“…Todos los microsatélites utilizados mostraron un alto grado de polimorfismo, evidenciado en el promedio de alelos por locus. El valor medio de alelos en el presente estudio, resultó mayor a los datos reportados por 22,23,16 quienes registraron un promedio de 2.8, 3.7 y 4.2 alelos por locus respectivamente y menor al obtenido por 24 con una media de 9.1 por locus y similar al obtenido por 25 quien reportó un valor promedio de 5.8 alelos.…”

Section: Discussionunclassified

“…De acuerdo a 26 , de los 12 marcadores utilizados, 9 marcadores pueden ser considerados muy informativos (PIC>0.5) para analizar la variabilidad genética de la población de maíz en Tierralta, Córdoba y 3 medianamente informativo (PIC > 0.25), siendo el locus Bnlg1740 de mayor valor (P= 0.888) y Phi059 (P=0.332) el de menor valor; estos resultados demuestran que los marcadores microsatélites son apropiados para la evaluación de la diversidad genética de la especie 27 . El PIC promedio obtenido en el presente estudio, resultó mayor al reportado por 22,[28][29][30][31] 0.42, 0.58, 0.56, 0.50 y 0.41, menor al reportado por 32,15 0.82 y 0.70 y similar al reportado por 33,34 quienes reportaron un valor promedio de 0.60.…”

Section: Discussionunclassified

Diversidad genética en una población de maíz criollo (Zea mays L.) evaluados mediante marcadores microsatélites en Tierralta, Córdoba-Colombia

Pérez¹,

Ramírez²,

Martínez³

2018

BISTUA

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El objetivo del trabajo fue determinar la diversidad genética una población de maíz criollo (Zea mays L.) en Tierralta Córdoba–Colombia usando marcadores microsatélites. Se tomaron muestras de 30 accesiones de Z. mays, las cuales fueron deshidratadas con sílica gel. La extracción de ADN fue realizada con el kit de extracción Wizard® Genomic DNA Purification (PROMEGA). El estudio de la diversidad se realizó utilizando 12 marcadores microsatélites. Los productos de PCR se separaron mediante electroforesis en geles de poliacrilamida al 8%, revelados mediante tinción con nitrato de plata. Todos los microsatélites mostraron un alto grado de polimorfismo. Se detectaron entre 2 y 12 alelos, con un promedio de 5.83 y un total de 70 alelos. El número efectivo de alelos promedio fue de 3.5. Los valores del PIC oscilaron entre 0.33 y 0.88 para los marcadores Phi059 y Bnlg1740 respectivamente. Las pruebas para el equilibrio Hardy Weinberg indicó que la población estaba en desequilibrio (p<0.05). El promedio de la heterocigosidad esperada fue de 0.65, siendo este un indicador de alta variabilidad. La población de maíz criollo presentó una alta diversidad genética. Los marcadores microsatélites fueron muy informativos y pueden ser utilizados para posteriores estudios de diversidad genética en esta especie.

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Genetic diversity in elite inbred lines of maize and its association with heterosis

Cited by 23 publications

References 24 publications

Genetic divergence among corn hybrids and combining ability for agronomic and bromatological traits of silage

Genetic divergence among corn hybrids and combining ability for agronomic and bromatological traits of silage

Evaluation of Maize Varieties for Grain Yield under Water-restricted Conditions

Diversidad genética en una población de maíz criollo (Zea mays L.) evaluados mediante marcadores microsatélites en Tierralta, Córdoba-Colombia

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