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.
Hydrangea paniculata Siebold · Panicled hydrangea
Yokoi Masato|Kawaguchi, JP
Daucus carota L. · Carrot
Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas
Secale cereale L. · Rye
Stift Schlägl Saatgutzüchtung
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Kwekerij Sidaco B.V.
Brassica napus var. napus · Rapeseed
RUP «NAUCHNO - PRAKTICHESKIJ CZENTR NAN BELARUSI PO ZEMLEDELIYU»
Beta vulgaris L. · Beet
Danisco Seed
Hydrangea paniculata Siebold · Panicled hydrangea
Information regarding the breeder received in the contribution to CPVO :De Belder R. & J.
Citrus reticulata Blanco · Mandarin orange
IVIA
Brassica napus L. · Rapeseed
Stephan Pleines
Beta vulgaris Sugar Beet Group · Sugar beet
SES EUROPE N.V./S.A.
Brassica napus var. napus · Rapeseed
Syngenta Crop Protection AG
Nicotiana tabacum L. · Tobacco
Dimitar G. Dimitrov, Todora I. Ivancheva, Nikola I. Taskov, Rumyana I. Trancheva
Malus domestica (Suckow) Borkh. · Apple
Domaine Public (FR)
Malus domestica (Suckow) Borkh. · Apple
VAN SENT V.WHIPPLE (US)
Zea mays L. · Maize
Melnyk Vitalii IAkovych, Moskalenko Volodymyr Fedorovych,
Beta vulgaris Sugar Beet Group · Sugar beet
NOVARTIS SEEDS A.B.
Chrysanthemum L. · Chrysanthemum
PARATY B.V.B.A
Brassica oleracea L. (Kohlrabi Group) · Kohlrabi
Enza Zaden Beheer B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Dirr M.
Beta vulgaris Sugar Beet Group · Sugar beet
LION SEEDS
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
MATTHEW MILLER
Helianthus annuus L. · Sunflower
Sadik El Sayed
Brassica napus L. · Rapeseed
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG
Helianthus annuus L. · Sunflower
KRUT'KO VASILIJ IVANOVICh / SERBAJ ROMAN MIHAJLOVICh / LIBENKO NIKOLAJ ALEKSANDROVICh / GANZhELO NIKOLAJ GRIGOR'EVICh / BABICh VALERIJ IVANOVICh