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- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Improvement_(Suza_and_Lamkey)/01%3A_Chapters/1.04%3A_Refresher_on_Population_and_Quantitative_GeneticsJohanssen, in 1903, conducted an experiment in beans (Phaseolus vulgaris), a highly self-pollinated species, to study the effect of selection for seed weight using a seed lot from the cultivar ‘Prince...Johanssen, in 1903, conducted an experiment in beans (Phaseolus vulgaris), a highly self-pollinated species, to study the effect of selection for seed weight using a seed lot from the cultivar ‘Princess’. His experiments showed that: a) selection for seed weight was effective in the original unselected population (i.e., lines selected for differences in seed weight showed consistent differences in seed weight in subsequent generations; large seeded parents produced large seeded progeny and smal…
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Improvement_(Suza_and_Lamkey)/01%3A_Chapters/1.12%3A_Sorghum_BreedingBreeding objectives of sorghum include: high grain and fodder yield potential, resistance to diseases (smut, rust, grain mold, bacterial blight, anthracnose, and downy mildew etc.), resistance to inse...Breeding objectives of sorghum include: high grain and fodder yield potential, resistance to diseases (smut, rust, grain mold, bacterial blight, anthracnose, and downy mildew etc.), resistance to insect pests (stalk borer, shoot fly, and midge), resistance to drought and extremely acidic soil, wide adaptation and improved quality (for use in bread, porridge, snacks, and beverages).
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Improvement_(Suza_and_Lamkey)/01%3A_Chapters/1.03%3A_Genetic_Variation_and_Germplasm_Usage“Farmers’ Rights: In its Article 9, the International Treaty recognizes the enormous contribution that the local and indigenous communities and farmers of all regions of the world, particularly those ...“Farmers’ Rights: In its Article 9, the International Treaty recognizes the enormous contribution that the local and indigenous communities and farmers of all regions of the world, particularly those in the centers of origin and crop diversity, have made and will continue to make for the conservation and development of plant genetic resources which constitute the basis of food and agriculture production throughout the world.
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Improvement_(Suza_and_Lamkey)/02%3A_Applied_Learning_ActivitiesThe following downloadable Applied Learning Activities (ALAs) are associated with the Crop Improvement course: ALA 1-(Breeding Objectives) [DOC] ALA 3-(Quantitative and Qualitative traits) [DOC] ALA 4...The following downloadable Applied Learning Activities (ALAs) are associated with the Crop Improvement course: ALA 1-(Breeding Objectives) [DOC] ALA 3-(Quantitative and Qualitative traits) [DOC] ALA 4-(Development of simulated QTL mapping populations) [DOC] ALA 10-(BMS platform – Make germplasm list from existing database) [DOC] ALA 11-(BMS platform – Import germplasm list made in excel to BMS) [DOC] ALA 12-(Use of marker for patent protection) [DOC] ALA 13-(Cultivar Development) [DOC]
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Improvement_(Suza_and_Lamkey)/01%3A_Chapters/1.15%3A_Cassava_BreedingTo determine if a female flower is about to open, Kawano (1980) described a reliable method by which a petal of an unopened female flower is peeled back, if a drop of nectar is observed at the base of...To determine if a female flower is about to open, Kawano (1980) described a reliable method by which a petal of an unopened female flower is peeled back, if a drop of nectar is observed at the base of the pistil, the flower will open in the afternoon of the same day (Fig.
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Improvement_(Suza_and_Lamkey)/01%3A_Chapters/1.02%3A_Pedigree_Naming_Systems_and_SymbolsIn the F 2 the “81Y” indicates that this genotype was the 81st individual plant among those selected at location “Y.” The F 3 designation of “010M” indicates that 10 plants were selected and harvested...In the F 2 the “81Y” indicates that this genotype was the 81st individual plant among those selected at location “Y.” The F 3 designation of “010M” indicates that 10 plants were selected and harvested in bulk from the F 3 progeny row grown at location “M.” Seed from the bulked F 3 progeny row was planted at location “Y” in the F 4 and 10 plants were selected and harvested in bulk.
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Improvement_(Suza_and_Lamkey)/01%3A_Chapters/1.10%3A_Millet_BreedingThe discovery of A1 cytoplasmic-nuclear male sterility (CMS) system in Tifton, Georgia, USA and initiation of breeding of a commercially viable male-sterile line (A-line) is a breakthrough for hybrid ...The discovery of A1 cytoplasmic-nuclear male sterility (CMS) system in Tifton, Georgia, USA and initiation of breeding of a commercially viable male-sterile line (A-line) is a breakthrough for hybrid cultivar development in pearl millet and this led to the release of the first F 1 grain hybrid for production in India.
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Improvement_(Suza_and_Lamkey)/01%3A_Chapters/1.06%3A_Breeding_MethodsPlant breeders working with cytoplasmic male sterility (CMS) systems will aim to develop new ‘B-lines’ and ‘R-lines’. In crops where CMS system is used to produce hybrids, different ‘R’ restorer genes...Plant breeders working with cytoplasmic male sterility (CMS) systems will aim to develop new ‘B-lines’ and ‘R-lines’. In crops where CMS system is used to produce hybrids, different ‘R’ restorer genes are identified and breeders will improve ‘R-lines’ that will be used as males in creation of hybrids. ‘B-lines’ and ‘R-lines’ are developed using the self-pollinated breeding methods we learned about earlier in this module (pedigree, bulk, SSD, DH etc., or a modified method that combines more than…
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Improvement_(Suza_and_Lamkey)/01%3A_Chapters/1.05%3A_Steps_in_Cultivar_DevelopmentIn self pollinated crops with pure-line cultivars, it is assumed that the parent seed being used is a pure-line (homogenous and homozygous), but in case a breeder decided to accelerate incorporation o...In self pollinated crops with pure-line cultivars, it is assumed that the parent seed being used is a pure-line (homogenous and homozygous), but in case a breeder decided to accelerate incorporation of a trait and uses a line that is still segregating visually for a trait, more number of plants will need to be used to increase the probability of recovering desired recombinants.
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Improvement_(Suza_and_Lamkey)/01%3A_Chapters/1.07%3A_Participatory_Plant_Breeding_and_Participatory_Variety_SelectionThese different actors participate in setting PPB goals, setting breeding priorities, selecting genotypes from a heterogeneous population, helping in evaluation and selection of cultivars in the farme...These different actors participate in setting PPB goals, setting breeding priorities, selecting genotypes from a heterogeneous population, helping in evaluation and selection of cultivars in the farmers’ fields and on research stations, releasing and popularizing high yielding cultivars, and helping in seed multiplication and distributing (McGuire et al., 2003).
- https://bio.libretexts.org/Bookshelves/Agriculture_and_Horticulture/Crop_Improvement_(Suza_and_Lamkey)/01%3A_Chapters/1.14%3A_Groundnut_BreedingThis concept of “speed breeding” allows the breeder to maximize the efficiency of the breeding program by decreasing the growing period to maturity by ~30% relative to the time needed in the field, th...This concept of “speed breeding” allows the breeder to maximize the efficiency of the breeding program by decreasing the growing period to maturity by ~30% relative to the time needed in the field, thus increasing the number of generations that can be grown per calendar year to 3 (O’Connor et al.
