Hybrid Seed Production
Hybrid Seed Production - Related Videos
02:33
Seed Structure and Early Development of the Sporophyte
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2020
Seed structures are composed of a protective seed coat surrounding a plant embryo, and a food store for the developing embryo. The embryo contains the precursor tissues for leaves, stem, and roots. The endosperm and cotyledons—seed leaves—act as the food reserves for the growing embryo. The embryo contains a double set of chromosomes, one set from each parent. Fertilization of the haploid egg by the haploid sperm gives rise to the zygote, which develops into the embryo. The endosperm is a...
08:00
Whole-Mount In Situ Hybridization
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2023
Whole-mount in situ hybridization (WMISH) is a common technique used for visualizing the location of expressed RNAs in embryos. In this process, synthetically produced RNA probes are first complementarily bound, or "hybridized," to the transcripts of target genes. Immunohistochemistry or fluorescence is then used to detect these RNA hybrids, revealing spatial and temporal patterns of gene expression. Unlike traditional in situ hybridization techniques, which require thin tissue sections whose...
08:05
Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds
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Cited by 17 •
2013
We report an efficient and simple method to isolate embryos at early stages of development from Arabidopsis thaliana seeds. Up to 40 embryos can be isolated in 1 hr to 4 hr, depending on the downstream application. The procedure is suitable for transcriptome, DNA methylation, reporter gene expression, immunostaining and fluorescence in situ hybridization analyses.
03:24
Hybridization of Atomic Orbitals I
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2020
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
03:35
Hybridization of Atomic Orbitals II
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2020
sp3d and sp3d 2 Hybridization To describe the five bonding orbitals in a trigonal bipyramidal arrangement, we must use five of the valence shell atomic orbitals (the s orbital, the three p orbitals, and one of the d orbitals), which gives five sp3d hybrid orbitals. With an octahedral arrangement of six hybrid orbitals, we must use six valence shell atomic orbitals (the s orbital, the three p orbitals, and two of the d orbitals in its valence shell), which gives six sp3d 2 hybrid orbitals.
FAQs
Both approaches prevent the seed parent from supplying its own pollen. Hand emasculation removes the structures that produce pollen, while genetic or cytoplasmic male sterility provides a biological means of preventing self-pollination. Controlled environmental conditions can also limit unwanted pollen transfer. These measures preserve the intended parent combination and improve the reliability of the resulting cross.
Distinct parents contribute different inherited characteristics, allowing breeders to combine selected traits in the same F1 offspring. This planned combination can produce hybrid vigor, expressed as improved yield, resilience, or more consistent growth. Parent selection therefore determines which characteristics are brought together and strongly influences the performance and uniformity expected in the hybrid crop.
The strong performance of F1 plants depends on the particular genetic combination created by the selected parents. When hybrid plants produce later generations, that combination may no longer remain consistent, so traits such as uniform growth, resilience, or increased yield may not persist. This limitation explains why the performance of the original hybrid generation is especially important in crop development.
A typical workflow begins by choosing genetically distinct parent plants and designating one as the seed parent. Self-pollination is prevented through hand emasculation, male sterility, or suitable environmental control. Pollen is then transferred from the chosen pollen parent to the seed parent. The resulting seeds are collected as F1 material for evaluating the selected cross.
Researchers use this approach when they need to combine desirable characteristics from different cultivated plants or develop a crop with more uniform performance. It supports crop improvement and commercial seed development by directing which parents contribute to the next generation. The method is particularly useful when improved yield, resilience, or consistent growth is a target outcome.
F1 seeds can be examined for the expression of selected combinations of traits, including increased yield, resilience, and consistent growth. Researchers can also assess how uniformly the offspring develop, which helps determine whether the parental cross achieved its intended outcome. These observations guide crop improvement and help identify hybrids suitable for further development or commercial seed production.