scholarly journals Diversity analysis of maize inbred lines using DIVA-GIS under temperate ecologies

2016 ◽  
Vol 8 (3) ◽  
pp. 1576-1583 ◽  
Author(s):  
Z. A. Dar ◽  
A. A. Lone ◽  
N. Sunil ◽  
N. Sivaraj ◽  
G. Zafar ◽  
...  
Keyword(s):  
Climate Change ◽  
Quantitative Traits ◽  
South India ◽  
Diversity Index ◽  
Diversity Indices ◽  
Inbred Lines ◽  
Climatic Conditions ◽  
Diversity Analysis ◽  
Maize Inbred Lines ◽  
Ear Height

The vagaries of Climate Change variability need to be addressed and as climatic conditions change at particular experimental sites and maize producing regions, mega-environment assignments will need to be reassessed to guide breeders to appropriate new germplasm and target environments . The development of improved germplasm to meet the needs of future generations in light of climate change and population growth is of the upmost importance . Evaluation of the inbred lines from diverse ecosystems would be effective for production of lines with resilience towards climate variability. Hence, with this objective diverse set of inbred lines sourced from all over India were characterized and were evaluated with DIVA-GIS for diversity analysis of maize inbred lines. Grid maps generated for these maize inbred lines for eleven quantitative traits indicated that these lines can be sourced from North and South India. High Shannon diversity index with maximum range of 2.17-3.0, 2.25-3.0, 2.36-3.0, 2.4-4.0, 2.0-3.0, and 2.2-3.0 were recorded for the traits viz; plant height, ear height, grain weight, grain yield, kernel row and protein content respectively indicating the high response of these traits to ecosystem. However, inbred lines were found to be diverse for all the traits except for ears plant-1 (EPP) and they have been sourced from Northern and Southern parts of India while for EPP recorded less diversity index range of 0.4-1.0 indicating source from South India. Interestingly, less diverse inbred lines for all the eleven quantitative traits have been sourced from Indogangetic plains as indicated in diversity grid maps. Maximum diversity indices were recorded for anthesis silking interval (ASI), days to silking, days to tasseling, which are in the range of 0.97-2.0, 1.528-2.0, 1.516-2.0 and 1.528-2.0 respectively. Hence, DIVA-GIS enabled identification of diverse sources from varied ecosystems which can be used for developing improved lines/ cultivars with greater resilience towards climate change.

Molecular assessment of maize inbred lines (Zea mays L.) Using microsatellite markers

2018 ◽  
Vol 43 (4) ◽  
pp. 533-542
Author(s):  
Maniruzzaman ◽  
MG Azam ◽  
S Islam ◽  
MG Hossain ◽  
MM Rohman
Keyword(s):  
Genetic Diversity ◽  
Plant Breeding ◽  
Genetic Relatedness ◽  
Agricultural Research ◽  
Inbred Lines ◽  
The Other ◽  
Diversity Analysis ◽  
Genetic Diversity Analysis ◽  
Maize Inbred Lines ◽  
Maize Genotypes

Genetic diversity analysis and germplasm characterization are essential steps in plant breeding and molecular markers are proved tool to accomplish. The present study was undertaken at the Molecular Breeding Lab of Plant Breeding Division, Bangladesh Agricultural Research Institute (BARI) to determine the genetic relatedness and molecular characterization of 15 maize inbred lines of BARI. In present study, genetic diversity analysis was performed by using 10 SSR primers to evaluate the polymorphisms, among them six primers showed distinct polymorphism between the maize inbred lines. The maize genotypes E81, E144, E08, E167, E102, E142 and E121 were found more diverged (0.9003) compared to other inbred lines. On the other hand, the lowest genetic distance values (0.1501) were found between the genotype E140 and genotype E80 followed by genotype E126 and genotype E140; genotype E140 and genotype E65; genotype E65 and genotype E80 values were identical (0.4502). The genotypes viz. E81, E144, E08, E167, E102, E142 and E121 were found far away from centroid of the cluster and rest of the genotypes were placed around the centroid. The Principal Coordinate Analysis (PCO) helped to visualize four major clusters and showed that seven maize inbred lines (E81, E58, E08, E167, E102, E142 and E121) were far away from the other genotypes. In conclusion, SSR markers enabled discrimination among accessions and provided valuable information for future use in improvement of these genomic resources.Bangladesh J. Agril. Res. 43(4): 533-542, December 2018

scholarly journals Diversity Analysis of Maize Inbred Lines

2020 ◽  
Vol 9 (10) ◽  
pp. 2765-2773
Author(s):  
R. Jaishreepriyanka ◽  
Sweta Sinha ◽  
ShyamSundar Mandal ◽  
Birender Singh ◽  
Kumari Rashmi
Keyword(s):  
Inbred Lines ◽  
Diversity Analysis ◽  
Maize Inbred Lines

scholarly journals Selectivity of the sulfonylurea herbicide group in the crop of maize inbred lines

Pesticidi ◽  
2003 ◽  
Vol 18 (3) ◽  
pp. 187-194 ◽  
Author(s):  
Milivoje Milivojevic ◽  
Lidija Stefanovic ◽  
Ivan Husic ◽  
Milena Simic ◽  
Zdravko Hojka
Keyword(s):  
Untreated Control ◽  
Growing Season ◽  
Inbred Lines ◽  
Sulfonylurea Herbicide ◽  
Growing Period ◽  
Estimated Parameters ◽  
Maize Inbred Lines ◽  
Grain Moisture ◽  
Moisture Percentage ◽  
Ear Height

The selectivity of the nicosulfuron, primisulfuron-methyl and rimsulfuron herbicides in relation to 20 PL maize inbred lines was monitored. Obtained results were compared with the untreated control. The following parameters were measured during the growing period: plant height (cm): ear height (cm) leaf width at the ear bottom (cm): tassel length (cm); number of primary tassel branches; grain yield at the and of growing season (t/ha) and grain moisture percentage (%). The effects of applied herbicides on observed maize inbred lines showed different degrees of selectivity. Average values of estimated parameters for all studied inbreeds differed significantly over applied herbicides. Nicosulfuron was most selective.

Genetic diversity analysis of 119 Canadian maize inbred lines based on pedigree and simple sequence repeat markers

2011 ◽  
Vol 91 (4) ◽  
pp. 651-661 ◽  
Author(s):  
L. M. Reid ◽  
K. Xiang ◽  
X. Zhu ◽  
B. R. Baum ◽  
S. J. Molnar
Keyword(s):  
Genetic Diversity ◽  
Simple Sequence Repeat ◽  
Inbred Lines ◽  
Diversity Analysis ◽  
Sequence Repeat ◽  
Heterotic Groups ◽  
Simple Sequence Repeat Markers ◽  
Genetic Diversity Analysis ◽  
Maize Inbred Lines ◽  
Simple Sequence

Reid, L. M., Xiang, K., Zhu, X., Baum, B. R. and Molnar, S. J. 2011. Genetic diversity analysis of 119 Canadian maize inbred lines based on pedigree and simple sequence repeat markers. Can. J. Plant Sci. 91: 651–661. Since the early 1920s Agriculture and Agri-Food Canada (AAFC) has been developing maize varieties and inbred lines adapted to the early maize growing regions. These inbreds represent a large group of genetically diverse genotypes; however, many of the inbreds are of unknown heterotic backgrounds. The purpose of this study was to classify 119 elite maize inbred lines released from AAFC into heterotic groups using both pedigree data and simple sequence repeat (SSR) markers and also to explore the consistency among different classification analyses. Pedigree analysis placed the inbred lines into eight groups, six of which corresponded to known major heterotic groups representing Iowa Stiff Stalk Synthetic (BSSS), European flint, Lancaster, Minnesota 13, Early Butler, and Iodent; the two remaining groups consisted of germplasm derived mostly from Pioneer 3990 or Pioneer 3994 sources. Simple sequence repeat analysis of 105 loci resulted in a clustering of the inbreds into 10 groups. In comparison with the grouping based on pedigree, the SSR clustering groups had some discrepancies and groups of genetically similar germplasm, based on pedigree, could not always be confirmed with molecular markers. The results of this study will allow researchers and maize breeders to make more informed decisions on the use of these inbreds in breeding programs.

scholarly journals Genetic Diversity Analysis of Maize Inbred Lines from SCDA Turda - Romania Revealed by RAPD Molecular Markers

2011 ◽  
Vol 68 (1) ◽  
Author(s):  
Rodica POP ◽  
Ioan HAS ◽  
Iulia Francesca POPESCU ◽  
Monica HARTA ◽  
Doru PAMFIL
Keyword(s):  
Genetic Diversity ◽  
Molecular Markers ◽  
Phylogenetic Relationships ◽  
Inbred Lines ◽  
Genetic Distances ◽  
Diversity Analysis ◽  
Genetic Diversity Analysis ◽  
Upgma Dendrogram ◽  
Maize Inbred Lines ◽  
Polymorphic Bands

Knowledge of genetic diversity and relationships among maize inbred lines is indispensable to a breeding program. Our objective was to investigate the level of genetic diversity among maize inbred lines. Eighty-three maize inbred lines obtained from SCDA Turda were genotyped using 20 decamer primers. These primers generated, among the studied genotypes, a number of polymorphic bands comprised between 17 bands (OPA 03) and 7 bands (OPAB 11). The highest numbers of polymorphic bands were obtained with primer OPA 03, respectively 17 bands, followed by OPA 01, OPB 08 (16 polymorphic bands) and OPX 03 and OPAL 20 (13 polymorphic bands). Genetic distances were established using Nei Li/Dice coefficent and an UPGMA dendrogram was constructed with FreeTree software. The built dendrogram shows phylogenetic relationships between the analysed biological material.

scholarly journals Yield and forage quality in maize (Zea mays L.) inbred lines

2021 ◽  
Author(s):  
Odilon Gayosso Barragán ◽  
Griselda Chávez-Aguilar ◽  
José Angel Marroquín-Morales ◽  
Alfonso López-Benítez
Keyword(s):  
Genetic Diversity ◽  
Plant Height ◽  
Inbred Lines ◽  
Forage Yield ◽  
Neutral Detergent Fiber ◽  
Acid Detergent Fiber ◽  
Maize Inbred Lines ◽  
Ear Height ◽  
Female Flowering ◽  
Improvement Programs

Objective: To analyze the genetic diversity (agronomic attributes, forage yield, and fiber content) of 100 maize inbred lines and to identify genotypes with potential for the breeding of plants with the said traits. Design/methodology/approach: One-hundred maize inbred lines were evaluated in two environments, in a 10 x 10 complete block experimental design, with two repetitions. Days to male flowering, days to female flowering, ear height, plant height, stem diameter, green forage yield, neutral detergent fiber, and acid detergent fiber data were recorded. Results: Significant differences were observed in the environmental sources of variation and genotypes for all the traits evaluated. The first four components account for 81% of the total variation observed and the first two account for 66% of the variation. The variables which have the highest absolute value and which strongly influence the dispersion of the genotypes, as well as the formation of groups, were: plant height, forage yield, and acid detergent fiber (component one) and days to female flowering and days to male flowering (component two). Consequently, the genotypes were dispersed in four groups. Study limitations/implications: It was not possible to conduct genetic diversity studies using molecular markers. Findings/conclusions: The grouping pattern of inbred lines shows the genetic diversity present; this can be an important tool in genetic improvement programs aimed at obtaining hybrids with specific characteristics.

scholarly journals Combining ability and genetic divergence among tropical maize inbred lines using SSR markers

2021 ◽  
Vol 43 ◽  
pp. e53317
Author(s):  
Tauana Gibim Eisele ◽  
Dener Lazzari ◽  
Tereza Aparecida da Silva ◽  
Ronald José Barth Pinto ◽  
Robson Akira Matsuzaki ◽  
...  
Keyword(s):  
Grain Yield ◽  
Ssr Markers ◽  
Genetic Divergence ◽  
Combining Ability ◽  
Inbred Lines ◽  
Simultaneous Increase ◽  
Additive Effects ◽  
Tropical Maize ◽  
Maize Inbred Lines ◽  
Ear Height

Our objectives were to evaluate general and specific combining ability (SCA) and genetic divergence among tropical maize inbred lines using single sequence repeat (SSR) markers. Thirteen inbred lines were crossed based on a complete diallel scheme. Hybrids and three checks were evaluated in a lattice experimental design. Silk and anthesis flowering, average plant height, average ear height, white spot (Pantoea ananatis) and gray leaf spot (Cercospora zeae-maydis) severity, and grain yield were evaluated. Significant differences (p < 0.05) for general and specific combining abilities were observed for all traits. Based on additive effects, inbred lines 1 (Flash) and 12 (SG 6015) were selected to reduce the flowering period and plant and ear height. Inbred lines 2 (CD 303) and 3 (AG 8080) were selected to reduce disease severity. For the simultaneous increase in grain yield and reduced severity of diseases, line 11 (AG 9090) as a parent or tester in topcross schemes is recommended. According to non-additive effects, crosses 2 (CD 303) × 13 (DKB 747) and 11 (AG 9090) × 12 (SG 6015) were selected for grain yield and future breeding programs. Six groups were identified using SSR markers; a major group contained six inbred lines. Because of the minor relationship between genetic divergence and SCA effects on grain yield limits, the use of the groups for future divergent crosses is recommended.

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