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- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Genetics_(Suza_and_Lamkey)/01%3A_Chapters/1.04%3A_Gene_Segregation_and_Genetic_RecombinationIn order to have a better understanding of the concept of gene that will be the focus of this and the following lesson on linkage, it is critical to understand the chemical nature of DNA . Let’s revie...In order to have a better understanding of the concept of gene that will be the focus of this and the following lesson on linkage, it is critical to understand the chemical nature of DNA . Let’s review the pathways by which the genetic information in DNA is transferred from one DNA molecule to another (the process termed DNA replication) and from DNA to ribonucleic acid (RNA) molecules (called transcription), and then transferred from RNA to a protein (termed translation) by a code that specifi…
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Genetics_(Suza_and_Lamkey)This book provides an introduction to genetic concepts such as reproductive systems, recombination, mutation, segregation and linkage analysis, inbreeding, quantitative inheritance, fertility regulati...This book provides an introduction to genetic concepts such as reproductive systems, recombination, mutation, segregation and linkage analysis, inbreeding, quantitative inheritance, fertility regulation, population genetics and polyploidy.
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Genetics_(Suza_and_Lamkey)/01%3A_Chapters/1.10%3A_Ploidy-_Polyploidy_Aneuploidy_and_HaploidyIn addition to identifying the genetic origin of a crop, genes, as well as whole genomes, can be transferred among related species to obtain novel genotypes and to combine the favorable qualities of d...In addition to identifying the genetic origin of a crop, genes, as well as whole genomes, can be transferred among related species to obtain novel genotypes and to combine the favorable qualities of different species as is demonstrated in the creation of Triticale. In an autotetraploid, only four nulliplex genotypes are possible (a 1 a 1 a 1 a 1 , a 2 a 2 a 2 a 2 , a 3 a 3 a 3 a 3 , and a 4 a 4 a 4 a 4 ), and only one tetragenic is possible (a 1 a 2 a 3 a 4 ).
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Genetics_(Suza_and_Lamkey)/01%3A_Chapters/1.09%3A_Mutations_and_VariationWith reference to a given crop and its wild and cultivated relatives, the concept of gene pool (all of the genes shared by individuals in a group of interbreeding individuals) has been applied to cate...With reference to a given crop and its wild and cultivated relatives, the concept of gene pool (all of the genes shared by individuals in a group of interbreeding individuals) has been applied to categorize a broad range of plant genetic resources according to the ease of gene transfer or gene flow to the particular crop species (Harlan and de Wet 1971).
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Genetics_(Suza_and_Lamkey)/01%3A_Chapters/1.06%3A_Population_GeneticsIn the study of population genetics, the focus shifts away from the individual (which is the focus for transmission genetics) and the cell (which is the focus for molecular genetics) to emphasis on a ...In the study of population genetics, the focus shifts away from the individual (which is the focus for transmission genetics) and the cell (which is the focus for molecular genetics) to emphasis on a large group of individuals—a Mendelian population—that is defined as a group of interbreeding individuals who share a common set of genes.
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Genetics_(Suza_and_Lamkey)/01%3A_Chapters
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Genetics_(Suza_and_Lamkey)/01%3A_Chapters/1.01%3A_Reproduction_in_Crop_PlantsThe embryo sac with the eight haploid nuclei thus arranged is the mature megagametophyte the female gamete or egg, and the two flanking ones the synergids; the remaining three, the antipodal cells, co...The embryo sac with the eight haploid nuclei thus arranged is the mature megagametophyte the female gamete or egg, and the two flanking ones the synergids; the remaining three, the antipodal cells, come to lie at the opposite end of the sac.
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Genetics_(Suza_and_Lamkey)/01%3A_Chapters/1.02%3A_Flower_Morphology_and_DistributionThe “-oecious” part of the word translates to “house.” Thus, an easy way to remember the distinction between these terms is to remember that in monoecious species, the staminate and pistillate flowers...The “-oecious” part of the word translates to “house.” Thus, an easy way to remember the distinction between these terms is to remember that in monoecious species, the staminate and pistillate flowers reside in the same house or plant, whereas in dioecious species, these flowers reside in two different houses or plants.
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Genetics_(Suza_and_Lamkey)/01%3A_Chapters/1.08%3A_Inheritance_of_Quantitative_TraitsThe performance of the progeny is a function of the genetic factors inherited from the parents. (Assume that “parent” means either a random plant or line from a population.) Thus, X, the parent value,...The performance of the progeny is a function of the genetic factors inherited from the parents. (Assume that “parent” means either a random plant or line from a population.) Thus, X, the parent value, is the independent variable, and Y, the progeny value, is the response or dependent variable.
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Genetics_(Suza_and_Lamkey)/01%3A_Chapters/1.03%3A_Controlled_Hybridization-_Self-incompatibility_Male-sterility_and_Sex-inheritanceAs with the naturally occurring genetic male sterility we discussed earlier, it is impossible to maintain a population of completely male sterile plants as we can in cytoplasmic male sterility; so to ...As with the naturally occurring genetic male sterility we discussed earlier, it is impossible to maintain a population of completely male sterile plants as we can in cytoplasmic male sterility; so to identify the male sterile plants from the male fertile ones and to be able to eliminate male fertile plants, an herbicide-resistance gene has been linked to the male sterility gene.
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Genetics_(Suza_and_Lamkey)/01%3A_Chapters/1.07%3A_Inbreeding_and_HeterosisThe performance of a hybrid relative to its parents can be described in two ways: mid-parent heterosis is the performance of a hybrid compared with the average of the performance of its parents; high-...The performance of a hybrid relative to its parents can be described in two ways: mid-parent heterosis is the performance of a hybrid compared with the average of the performance of its parents; high-parent heterosis is a comparison of the performance of the hybrid with that of the best parent:
