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.
Hordeum vulgare L. · Barley
STRENG OTTO| Otto Streng / GEISSENDOERFER| Herbert Geissendoerfer
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :EVELEENS C P
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Kolster Holdings BV
Cucurbita maxima Duchesne x Cucurbita moschata Duchesne
TOKITA SEED CO LTD
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Jean-Pierre Challet
Hydrangea paniculata Siebold · Panicled hydrangea
Renault, Eric / Renault, Jean / Renault, Thierry
Brassica oleracea L. (Cauliflower Group) · Cauliflower
SYNGENTA SEEDS B.V.
Hydrangea L. · Hydrangea
HIROSHI EBIHARA
Hydrangea paniculata Siebold · Panicled hydrangea
Rein Bulk
Cotinus coggygria Scop. · European smoketree
Sanders-van Harn Adriana Christina Bastiana
Bidens ferulifolia (Jacq.) DC. · Apache beggartick
SATO KAZUNORI
Hydrangea paniculata Siebold · Panicled hydrangea
Renault Jean
Nemesia Vent. · Nemesia
Silvia Hofmann
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
NIELS ARTS
Buddleja L. · Buddleia
North Carolina State University / North Carolina State University
Brassica napus var. napus · Rapeseed
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG. Herrn Dr. Martin Frauen / Dr. Werner Paulmann / Jürgen Noack
Brassica napus L. · Rapeseed
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG
Brassica napus var. napus · Rapeseed
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG
Brassica napus var. napus · Rapeseed
Euralis Semences
Brassica napus var. napus · Rapeseed
Euralis Semences
Triticum aestivum L. · Bread wheat
PLANT BREEDING INTERNATIONAL CAMBRIDGE
Solanum lycopersicum L. · Tomato
Seminis Vegetable Seeds
Alstroemeria L. · Alstroemeria
Parigo Horticultural Co. Ltd.