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.
Brassica napus var. napus · Rapeseed
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG
Phaseolus vulgaris L. · Common bean
PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.
Avena sativa L. · Oat
Plant Breeding International Cambridge Ltd (GB)
Brassica napus var. napus · Rapeseed
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG. Herrn Dr. Martin Frauen / Dr. Werner Paulmann
Beta vulgaris Sugar Beet Group · Sugar beet
Lion Seeds LTD (UK)
Pisum sativum L. · Pea
SLUIS & GROOT BV (NL)
Beta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
Brassica oleracea L. (Savoy Cabbage Group) · Savoy cabbage
Nickerson Zwaan B.V. (NL)
Brassica napus var. napus · Rapeseed
MORTEN HELT POULSEN
Beta vulgaris Sugar Beet Group · Sugar beet
Margaret Rekoske
Beta vulgaris Sugar Beet Group · Sugar beet
Betaseed
Brassica oleracea L. (White Cabbage Group) · White cabbage
TAKII EUROPE B V
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Helianthus annuus L. · Sunflower
AGRI OBTENTIONS / INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE (I.N.R.A.)
Nemesia Vent. · Nemesia
Silvia Hofmann
Buddleja x luteolufaucia
Instituut voor Landbouw- en Visserijonderzoek (ILVO) Eenheid Plant
Hybrids between Hibiscus paramutabilis and Hibiscus syriacus
Walberton Plants Limited (GB)
Helianthus annuus L. · Sunflower
Vladimir Miklich, Drahan Shkorych, Deian Iovanovych,
Hordeum vulgare L. · Barley
Darina Dimova Valcheva, Dragomir Valchev
Brassica napus var. napus · Rapeseed
D J Van der Have BV (NL)
Brassica napus var. napus · Rapeseed
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG. Herrn Dr. Martin Frauen / Dr. Werner Paulmann / Juergen Noack
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Kwekerij Sidaco B.V.
Brassica napus var. napus · Rapeseed
Rustica Prograin Genetique