Variety traits
CMS is a condition in plants where pollen is either not produced or is non-viable despite the normal development of female organs. It is a fundamental trait in commercial seed production that prevents self-pollination and allows the production of hybrid seeds without manual emasculation.
Mentioned in descriptions 4 451 varieties reference book.
Cytoplasmic male sterility manifests as the absence of fertile pollen, while pistillate organs remain functional. In breeding processes, such plants are used as maternal lines, which are pollinated by paternal forms to ensure 100% hybridity of the offspring. To obtain commercial fertile hybrids, nuclear fertility-restorer genes are introduced into the plant genotype, ensuring normal pollen development in the final product.
The trait is evaluated by determining the degree of pollen sterility, morphological examination of anthers for signs of degeneration and their ability to dehisce, as well as by microscopic analysis of pollen grains. Modern methods include the use of molecular DNA markers to identify sterility genes in mitochondria and restorer genes in the nucleus.
The manifestation of CMS depends on the interaction between the genotype and environmental conditions, including temperature and humidity, which can affect the stability of the trait. Incomplete fertility restoration in commercial crops can lead to seed set issues, so when selecting a hybrid, the originator's guarantee regarding the effective performance of fertility restorers under field conditions is important.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Helianthus annuus L. · Sunflower
Institute of Field & Vegetable Crops (RS)
Helianthus annuus L. · Sunflower
Hydrangea paniculata Siebold · Panicled hydrangea
Information regarding the breeder received in the contribution to CPVO :Wynn-Jones B. & S.
Sorghum x drummondii (Steud.) Millsp. & Chase · Sudangrass
Hydrangea arborescens L. · Smooth hydrangea
Information regarding the breeder received in the contribution to CPVO :De Belder
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Wädenswil
Hydrangea quercifolia W. Bartram · Oakleaf hydrangea
No information of breeder available for this variety
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Mouillère E.
Pyrus communis L. · European pear
Hydrangea paniculata Siebold · Panicled hydrangea
Information regarding the breeder received in the contribution to CPVO :Siebold
Hydrangea aspera Buch.-Ham. ex D. Don · Rough-leaved hydrangea
Information regarding the breeder received in the contribution to CPVO :Hillier J. & Coombe A.
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Wädenswil
Hydrangea L. · Hydrangea
Information regarding the breeder received in the contribution to CPVO :Champion B.
Hydrangea L. · Hydrangea
Solanum lycopersicum L. · Tomato
Hydrangea anomala D. Don
Information regarding the breeder received in the contribution to CPVO :Wynn-Jones B. & S.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Lemoine
Hydrangea paniculata Siebold · Panicled hydrangea
Information regarding the breeder received in the contribution to CPVO :De Belder R. & J.
Hydrangea arborescens L. · Smooth hydrangea
Information regarding the breeder received in the contribution to CPVO :Olsen R.
Hydrangea paniculata Siebold · Panicled hydrangea
Information regarding the breeder received in the contribution to CPVO :Darthuizer
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Wädenswil
Hydrangea L. · Hydrangea
Information regarding the breeder received in the contribution to CPVO :Hayashi