Publication Date
1993
Description
Between the selection of a population and its commercial use, several generations of multiplication are necessary. The essential feature in variety maintenance is that no genetic changes occur during multiplication. In seed-propagated species, however, during each multiplication cycle natural selection takes place at ihe gamete, zygote, seed and plant level. In induced autopolyploids high frequencies of aneuploids can occur. Aneuploidy not only affects the seed yield level, but also the selection processes that occur during multiplication. It may cause genetic shift and affect variety stability. Species differ in their tolerance to aneuploids. It is not possible to eliminate aneuploidy by selection because there is an equilibrium between euploids that keep producing aneuploids, and vice versa. The way this equilibrium is affected by environmental factors (weather, pollen supply, plant density, stress) is discussed.
Citation
Elgersma, A, "Effects of Aneuploidy on Seed Production in Autopolyploid Forage Crops" (2024). IGC Proceedings (1993-2023). 41.
https://uknowledge.uky.edu/igc/1993/session45/41
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Effects of Aneuploidy on Seed Production in Autopolyploid Forage Crops
Between the selection of a population and its commercial use, several generations of multiplication are necessary. The essential feature in variety maintenance is that no genetic changes occur during multiplication. In seed-propagated species, however, during each multiplication cycle natural selection takes place at ihe gamete, zygote, seed and plant level. In induced autopolyploids high frequencies of aneuploids can occur. Aneuploidy not only affects the seed yield level, but also the selection processes that occur during multiplication. It may cause genetic shift and affect variety stability. Species differ in their tolerance to aneuploids. It is not possible to eliminate aneuploidy by selection because there is an equilibrium between euploids that keep producing aneuploids, and vice versa. The way this equilibrium is affected by environmental factors (weather, pollen supply, plant density, stress) is discussed.
