Population Structure and Single Nucleotide Polymorphism Diversity of Historical Minnesota Maize Inbreds

Schaefer, Christopher M.; Bernardo, Rex

doi:10.2135/cropsci2012.11.0632

Cited by 16 publications

(27 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The average Fst value was 0.069, larger than in breeding programs of the Corn Belt (Romay et al, 2013), between (Liu et al, 2015) and between elite Chinese lines and public US lines (Jiao et al, 2012). However, obtained Fst value in this study was smaller compared to Fst = 0.165 in a diverse panel of 284 maize inbreds (Schaefer, Bernardo, 2013).…”

Section: Resultscontrasting

confidence: 68%

“…Wu et al (2015) revealed clustering patterns of 1857 maize accessions from around the world represented by Mo17, B73, 207, Oh43 and A634 (containing 87.5% of B14 germplasm), several Chinese lines, Reid Yellow Dent, tropical and subtropical germplasm. The B73, Mo17, Oh43, PH207 and A321 maize subpopulations were identified with SSR and SNP markers by Schaefer and Bernardo (2013). Pedigree information and shared allele frequencies of the inbred lines developed at the Institute of Field and Vegetable Crops, Serbia and the referent historical lines, such as B73, Mo17, B14 and PH207, showed a considerable contribution of these ancestor-inbreds to in the lineage of the modern inbred lines and indicated the importance in maize breeding in the southeast Europe.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Molecular and phenotypic characterisation of diverse temperate maize inbred lines in Southeast Europe

Mikić

Kondić‐Špika

Brbaklić³

et al. 2017

Zemdirbyste-Agriculture

View full text Add to dashboard Cite

Maize (Zea mays L.) displays large genetic diversity created during the history of introduction from its Mexican centre of origin to other parts of the world and adaptation to a range of diverse environments. Despite such diversity, maize breeders use only a small portion of the available maize germplasm to develop modern hybrids. Broadening diversity of breeding collections by the introduction of new germplasm, as a source of favourable traits, requires its characterisation and classification of new germplasm into heterotic groups. The aim of this study was to estimate genetic diversity of maize breeding material from the Institute of Field and Vegetable Crops in Serbia, including previously uncharacterised inbred lines, elite lines with known pedigrees and historically important inbred lines. Microsatellite-based cluster analysis and principal coordinate analysis separated 96 inbred lines into six clusters, Iowa Stiff Stalk Synthetic (BSSS), Lancaster Sure Crop (LSC), Iodent (IDT) heterotic group, a cluster with unrelated independent inbreds and two clusters of miscellaneous germplasm crossed with inbreds of BSSS and Lancaster background. The microsatellites umc1035, bnlg666, dupssr23, umc1083 and dupssr10 contributed most to the differentiation between the groups. The largest values of molecular diversity parameters were detected in the BSSS group, following by the Lancaster and then the other groups. An analysis of variance showed that almost all traits significantly varied among the groups and between the years. The investigated lines demonstrated sufficient variation in most of the analysed phenotypic traits, proving suitable for further genetic studies. A principal component analysis based on agronomic traits differentiated inbred lines from the BSSS and Lancaster pools, but failed to separate the other groups. The characterisation and classification of genetic resources using microsatellite markers may assist hybrid breeding by efficient exploitation of heterotic patterns.

show abstract

Section: Resultscontrasting

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Molecular and phenotypic characterisation of diverse temperate maize inbred lines in Southeast Europe

Mikić

Kondić‐Špika

Brbaklić³

et al. 2017

Zemdirbyste-Agriculture

View full text Add to dashboard Cite

show abstract

“…Similar results have been reported in studies conducted by Yan et al (2010), who reported seven clusters obtained by using 1362 SNP markers. Schaefer and Bernardo (2013) reported the effectiveness of SNP markers as they managed to group 284 maize inbreds into five clusters. Yang et al (2011) reported that the same clusters were observed by using both SSR and SNP markers.…”

Section: Genetic Distancementioning

confidence: 99%

Diversity and path coefficient analysis of Southern African maize hybrids

Mhoswa

Derera

Qwabe

et al. 2016

Chilean J. Agric. Res.

View full text Add to dashboard Cite

Detailed knowledge on genetic diversity among germplasm is important for hybrid maize (Zea mays L.) breeding. The objective of the study was to determine genetic diversity in widely grown hybrids in Southern Africa, and compare effectiveness of phenotypic analysis models for determining genetic distances between hybrids. Fifty hybrids were evaluated at one site with two replicates. The experiment was a randomized complete block design. Phenotypic and genotypic data were analyzed using SAS and Power Marker respectively. There was significant (p < 0.01) variation and diversity among hybrid brands but small within brand clusters. Polymorphic Information Content (PIC) ranged from 0.07 to 0.38 with an average of 0.34 and genetic distance ranged from 0.08 to 0.50 with an average of 0.43. SAH23 and SAH21 (0.48) and SAH33 and SAH3 (0.47) were the most distantly related hybrids. Both single nucleotide polymorphism (SNP) markers and phenotypic data models were effective for discriminating genotypes according to genetic distance. SNP markers revealed nine clusters of hybrids. The 12-trait phenotypic analysis model, revealed eight clusters at 85%, while the five-trait model revealed six clusters. Path analysis revealed significant direct and indirect effects of secondary traits on yield. Plant height and ear height were negatively correlated with grain yield meaning shorter hybrids gave high yield. Ear weight, days to anthesis, and number of ears had highest positive direct effects on yield. These traits can provide good selection index for high yielding maize hybrids. Results confirmed that diversity of hybrids is small within brands and also confirm that phenotypic trait models are effective for discriminating hybrids.

show abstract

“…For U.S. maize breeding, three main heterotic groups, i.e., Iowa Stiff Synthetic (SS), Non-Stiff Stalk (NSS) and Iodent (IDT), were formed in the late 1950s and constitute genetically distinct breeding pools today [3], with representative lines of B73, Mo17 and 207, respectively. Integrated with the pedigree information and high-throughput molecular makers, the current maize germplasm is further divided into Oh43, Lancaster, Oh07-Midland, Iodent, SS, commercial hybrid-derived groups, Argentine Maize Amargo background groups [3], A321, 207 [17], Tangsipingtou (TSPT), Ludahonggu (LDHG), Modified Reid, Lancaster, and P group [18, 19]. Common groups of B73, Mo17, 207, and HZS have been observed in different reports [4, 18, 20, 21].…”

Section: Introductionmentioning

confidence: 99%

Exploring Identity-By-Descent Segments and Putative Functions Using Different Foundation Parents in Maize

et al. 2016

PLoS ONE

View full text Add to dashboard Cite

Maize foundation parents (FPs) play no-alternative roles in hybrid breeding because they were widely used in the development of new lines and hybrids. The combination of different identity-by-descent (IBD) segments and genes could account for the formation patterns of different FPs, and knowledge of these IBD regions would provide an extensive foundation for the development of new candidate FP lines in future maize breeding. In this paper, a panel of 304 elite lines derived from FPs, i.e., B73, 207, Mo17, and Huangzaosi (HZS), was collected and analyzed using 43,252 single nucleotide polymorphism (SNP) markers. Most IBD segments specific to particular FP groups were identified, including 116 IBD segments in B73, 105 in Mo17, 111 in 207, and 190 in HZS. In these regions, 423 quantitative trait nucleotides (QTNs) associated with 15 agronomic traits and 804 candidate genes were identified. Some known adaptation-related genes, e.g., dwarf8 and vgt1 in HZS, zcn8 and epc in Mo17, and ZmCCT in 207, were validated as being tightly linked to particular IBD segments. In addition, numerous new candidate genes were also identified. For example, GRMZM2G154278 in HZS, which belongs to the cell cycle control family, was closely linked to a QTN of the ear height/plant height (EH/PH) trait; GRMZM2G051943 in 207, which encodes an endochitinase precursor (EP) chitinase, was closely linked to a QTN for kernel density; and GRMZM2G170586 in Mo17 was closely linked to a QTN for ear diameter. Complex correlations among these genes were also found. Many IBD segments and genes were included in the formation of FP lines, and complex regulatory networks exist among them. These results provide new insights on the genetic basis of complex traits and provide new candidate IBD regions or genes for the improvement of special traits in maize production.

show abstract

Population Structure and Single Nucleotide Polymorphism Diversity of Historical Minnesota Maize Inbreds

Cited by 16 publications

References 27 publications

Molecular and phenotypic characterisation of diverse temperate maize inbred lines in Southeast Europe

Molecular and phenotypic characterisation of diverse temperate maize inbred lines in Southeast Europe

Diversity and path coefficient analysis of Southern African maize hybrids

Exploring Identity-By-Descent Segments and Putative Functions Using Different Foundation Parents in Maize

Contact Info

Product

Resources

About