Lettuce Germplasm
Lettuce Germplasm - Related Videos
06:35
Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce (Lactuca sativa) Germplasm Collections
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Cited by 12 •
2015
This protocol was developed to screen a large germplasm collection of the leafy vegetable lettuce (Lactuca sativa L.) for drought-tolerance, in order to identify a small candidate pool of lettuce for use in physiological, molecular, and genetic studies to identify underlying drought-tolerance traits along with breeding programs.
10:22
Improved UPLC-UV Method for the Quantification of Vitamin C in Lettuce Varieties (Lactuca sativa L.) and Crop Wild Relatives (Lactuca spp.)
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Cited by 10 •
2020
We present a fast and reliable method to quantify vitamin C in Lactuca spp. using UPLC-UV, potentially transferable to other plants. The key steps are the sample preparation and vitamin C extraction under stable conditions, the reduction of dehydroascorbic acid to ascorbic acid and the optimization of the chromatographic procedure.
15:19
Effect of Male Accessory Gland Products on Egg Laying in Gastropod Molluscs
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Cited by 35 •
2014
This video protocol demonstrates a method to study effects of seminal fluid in gastropods, using the hermaphroditic freshwater snail Lymnaea stagnalis.
10:08
The Golden Apple Snail Pomacea canaliculata: From Zygotes to Stable Mutant Lines
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Cited by 1 •
2025
This study developed a workflow for the generation and maintenance of stable mutant lines for the freshwater apple snail, Pomacea canaliculata. The protocols include the collection of zygotes, their microinjection with the CRISPR/Cas9 system components to induce genome editing, ex ovo culture of embryos, and genotyping after controlled crosses.
07:12
Determination of Self-(In)compatibility and Inter-(In)compatibility Relationships in Citrus Using Manual Pollination, Microscopy, and S-Genotype Analyses
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2023
This protocol provides a rapid method for determining pollen compatibility and incompatibility in citrus cultivars.
FAQs
Researchers compare accessions, or preserved genetic samples, for differences in traits and genetic markers. This comparison helps reveal variation that may correspond to useful alleles, such as those associated with disease resistance, stress tolerance, yield, quality, or environmental adaptation. The most informative candidates can then serve as parents in breeding efforts or as material for biological study.
Genetic markers provide a way to compare the genetic composition of lettuce accessions alongside their observable traits. Examining both types of information helps researchers connect inherited variation with agriculturally important characteristics. This combined approach supports the identification of useful alleles and improves understanding of the genetic basis of traits rather than relying on trait observations alone.
Crossing selected accessions allows breeders to combine desirable genetic features that may occur in different sources. The resulting lines can be examined for inherited combinations of traits, including resistance, tolerance, yield, quality, or adaptation. This process turns variation preserved in germplasm into breeding material that may support crop improvement.
These activities serve different but connected purposes in maintaining useful genetic resources. Collection brings variation into the resource, storage preserves it, regeneration supports its continued maintenance, and characterization documents relevant traits and markers. Together, they make accessions available for reliable comparison, biological research, and selection in future improvement programs.
A study may begin by selecting accessions from stored material, followed by regeneration and characterization. Researchers then compare traits and genetic markers to identify meaningful differences or useful alleles. Selected accessions can be retained for further investigation or crossed to combine features in new lines, linking conservation activities with research and breeding decisions.
Biologists can compare variation among cultivated lettuce and related types to investigate patterns of plant diversity and evolutionary relationships. Trait and marker information provides complementary evidence for examining how characteristics differ across genetic resources. These comparisons also help place agriculturally valuable variation within a broader biological context.
Lettuce germplasm can support efforts to improve disease resistance, stress tolerance, yield, quality, and adaptation to changing environments. Researchers first identify relevant variation through trait and marker comparisons, then select or cross promising accessions. The resulting lines provide material for evaluating whether combined inherited features meet a particular improvement goal.