Plant Genotyping
Plant Genotyping - Related Videos
11:00
Genotyping of Plant and Animal Samples without Prior DNA Purification
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Cited by 14 •
2012
The Direct PCR approach presented here facilitates PCR amplification directly from small amounts of unpurified plant and animal tissue.
11:15
Ice-Cap: A Method for Growing Arabidopsis and Tomato Plants in 96-well Plates for High-Throughput Genotyping
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Cited by 4 •
2011
The Ice-Cap method allows one to grow plants in 96-well plates and non-destructively harvest root tissue from each seedling. DNA extracted from this root tissue can be used for genotyping reactions. We have found that Ice-Cap works well for Arabidopsis thaliana, tomato, and rice seedlings.
08:27
Mouse Genotyping
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2023
Even though the human genome was mapped over 10 years ago, scientists are still far from understanding the function of every human gene! One way to evaluate how a gene functions is to disrupt the sequence encoding it and then evaluate the impact of this change (the phenotype) on the animal’s biology. This approach is commonly used in the mouse (Mus musculus), since it shares a high degree of genetic similarity with humans. To track the animals bearing genetic changes over several generations,...
08:23
SNP Genotyping
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2023
Single nucleotide polymorphisms, or SNPs, are the most common form of genetic variation in humans. These differences at individual bases in the DNA often do not directly affect gene expression, but in many cases can still be useful for locating disease-associated genes or for diagnosing patients. Numerous methodologies have been established to identify, or “genotype”, SNPs.JoVE’s introduction to SNP Genotyping begins by discussing what SNPs are and how they can be used to identify...
12:01
A PCR-based Genotyping Method to Distinguish Between Wild-type and Ornamental Varieties of Imperata cylindrica
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Cited by 5 •
2012
We provide a cost-effective and rapid molecular genotyping protocol that employs variety-specific PCR primers that target DNA sequence differences within the chloroplast trnL-F spacer region to differentiate between varieties of Imperata cylindrica (cogongrass) that cannot be distinguished by morphology alone. These varieties include the federally listed noxious weed, cogongrass and closely-related, wide-spread ornamental variety, I. cylindrica var. koenigii (Japanese blood grass).
FAQs
Single-nucleotide variants mark differences at individual DNA positions, while other molecular markers identify distinguishable regions or patterns in the genome. Comparing these features across plants reveals which individuals share or differ in specific genetic states. This molecular comparison helps researchers verify identity, follow inherited variation, and associate genetic differences with traits without relying only on visible characteristics.
These steps provide progressively usable access to genetic information. DNA extraction isolates genetic material from plant tissue, amplification increases selected regions for analysis, and sequencing determines the DNA information within targeted regions. Depending on the research question, investigators can therefore examine particular markers or sequence regions to detect variants that separate plant samples.
Inheritance tracking connects genetic differences in parents with the genotypes observed in their descendants. By following molecular markers through generations, researchers can determine which genetic patterns are transmitted together with, or near, traits of interest. This information supports gene mapping and helps identify individuals carrying useful variation for later evaluation or breeding decisions.
Molecular identity checks examine DNA features, whereas visible-trait evaluation focuses on characteristics expressed by the plant. DNA-based comparisons can distinguish plants through inherited markers and verify identity even when outward characteristics are insufficient for comparison. Using both perspectives gives biology researchers complementary information about genetic makeup and its relationship to observed traits.
A typical workflow begins with collecting plant tissue and extracting its DNA. Researchers then amplify or sequence selected DNA regions, followed by detection and comparison of differences such as single-nucleotide variants or other molecular markers. The resulting genotype data can be interpreted for identity verification, inheritance tracking, gene mapping, or selection of plants with relevant genetic patterns.
Breeding programs use genotype information to select individuals that carry genetic variation associated with desirable traits. Rather than waiting to evaluate every outcome solely through plant characteristics, researchers can track inherited molecular patterns while choosing breeding material. This supports more directed selection and contributes to developing crops with improved performance, quality, or resilience.
Comparing genotypes across plants or populations reveals patterns of genetic diversity and population structure, while ancestry-related analyses provide context for evolutionary studies. Researchers can also examine whether particular genetic differences occur alongside disease resistance or responses to environmental stress. These relationships help connect molecular variation with biological adaptation and agriculturally important outcomes.