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The stamen of a corn plant, showing the pollen.. Pollen drift is the accidental cross-pollination of different varieties of crops through natural dispersal methods. The term is used almost exclusively when referring to strains of corn, and especially refers to the crossing of genetically modified crops with those that are not.
Such plants set seeds only after cross-pollination. Dioecism: Cross-pollination always occurs when the plants are unisexual and dioecious, i.e., male and female flowers occur on separate plants, e.g., papaya, some cucurbits, etc. Heterostyly: The flowers of some plants have different lengths of stamens and styles so that self-pollination is not ...
Other characteristics of the parents are carefully chosen to provide desirable traits such as improved color, flavour, or disease resistance. Hybrid seeds planted by the farmer produce similar plants, but the seeds of the next generation from those hybrids will not consistently have the desired characteristics because of genetic assortment .
List of peanut diseases; List of pear diseases; List of pearl millet diseases; List of pecan diseases; List of pepper diseases; List of Persian violet diseases; List of pigeonpea diseases; List of pineapple diseases; List of foliage plant diseases (Piperaceae) List of pistachio diseases; List of pocketbook plant diseases; List of poinsettia ...
Plant diseases cause major economic losses for farmers worldwide. Across large regions and many crop species, it is estimated that diseases typically reduce plant yields by 10% every year in more developed settings, but yield loss to diseases often exceeds 20% in less developed settings.
Crop diseases (3 C, 3 P) F. Fodder (2 C, 53 P) Founder crops (3 C, 9 P) G. ... List of crop plants pollinated by bees; A. Agricultural biodiversity; Agricultural cycle;
Cross-pollination, where pollen from one plant can only fertilize a different plant; Asexual propagation (e.g. runners from strawberry plants) where the new plant is genetically identical to its parent; Apomixis (self-cloning), where seeds are produced asexually and the new plant is genetically identical to its parent
Plants adapted to self-fertilize often have similar stamen and carpel lengths. Plants that can pollinate themselves and produce viable offspring are called self-fertile. Plants that cannot fertilize themselves are called self-sterile, a condition which mandates cross-pollination for the production of offspring. [47]