Assessment of Heterosis Based on Genetic Distance Estimated Using SNP in Common Wheat

This study assessed the genetic distance (GD) between parental genotypes using single nucleotide polymorphism (SNP) DNA markers and evaluated the correlation between GD and heterosis in common wheat. We examined the performance of parents and hybrids in a field experiment conducted in a randomized b...

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Bibliographic Details
Published inAgronomy (Basel) Vol. 9; no. 2; p. 66
Main Authors Nie, Yingbin, Ji, Wanquan, Ma, Songmei
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.02.2019
Subjects
Agricultural production
Cluster analysis
Correlation analysis
Crop yield
Cultivars
Deoxyribonucleic acid
DNA
Food
Gene polymorphism
Genetic distance
Genetic diversity
Genetic testing
Genomes
Genotypes
Genotyping
Grain
Harvesting
Heterosis
heterosis prediction
Hybrids
Nucleotides
Polymorphism
Single-nucleotide polymorphism
Weight
Wheat
Beijing China
China
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Summary:This study assessed the genetic distance (GD) between parental genotypes using single nucleotide polymorphism (SNP) DNA markers and evaluated the correlation between GD and heterosis in common wheat. We examined the performance of parents and hybrids in a field experiment conducted in a randomized block design at a Shihezi location with three replications. Different traits such as the height of the parents and the F1 generation, number of harvested ears, number of grains per panicle, grain weight per panicle, 1000-grain weight, and grain yield were examined. Genotyping using a wheat 90K SNP chip determined the GD between the parents and analyzed the relationship between GD and heterotic performance of hybrids in wheat. Cluster analysis based on GD estimated using SNP chips divided the 20 elite parents into five groups which were almost consistent with the parental pedigree. Correlation analysis showed a significant association between GD and mid-parent heterosis (MPH) of 1000-grain weight. However, GD and high-parent heterosis (HPH) of 1000-grain weight showed no significant correlation. There was a weak correlation between GD and with spikelet number, harvested spikes, and yield at MPH or HPH. Hence, SNP analysis may be utilized in allocating wheat parents to heterotic groups. However, the correlation between SNP-based GD and hybrid performance still remains unclear.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy9020066