Laura
ActiveGeranium pratense L. · Meadow crane's-bill
Christine Morley
Variety traits
Cytoplasmic Male Sterility (CMS)
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.
Breakdown by crop
Male Sterility (CMS) — Hydrangea macrophylla
278
Cytoplasmic Male Sterility in Maize
76
Cytoplasmic Male Sterility in Sunflower
74
Male Sterility (CMS) — Sugar Beet
65
Cytoplasmic Male Sterility in Rapeseed
62
Male sterility in Hydrangea
37
Cytoplasmic Male Sterility (CMS) — Rye
25
Cytoplasmic Male Sterility in Rapeseed
23
Male sterility (CMS) — Spanish lavender
17
Cytoplasmic Male Sterility in Rice
15
Cytoplasmic Male Sterility in Tobacco
14
Cytoplasmic Male Sterility (CMS) — White Cabbage
11
Cytoplasmic Male Sterility in Sorghum
10
Cytoplasmic Male Sterility in Sweet Cherry
9
Cytoplasmic Male Sterility (CMS) in Cauliflower
8
Male sterility in Buddleja
8
Male sterility (CMS) — giant miscanthus
8
Male sterility in lilies
8
Cytoplasmic Male Sterility in Barley
7
Cytoplasmic Male Sterility (CMS) in Broccoli
7
Male sterility in mandarin
7
Male sterility in carrot
6
Cytoplasmic Male Sterility (CMS) in Hibiscus syriacus × Hibiscus paramutabilis hybrids
6
Male Sterility (CMS) — Sweet Chestnut
6
Found in these crops
Varieties that feature this in their description
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.
LH185WX
ActiveZea mays L. · Maize
HOLDEN FOUNDATION SEEDS INC.
LABZ0007
ActiveLavandula stoechas L. · French lavender
Syngenta Participations AG
LAVST103
TerminatedLavandula stoechas L. · French lavender
The Paradise Seed Company Pty Ltd
LABZ0005
ActiveLavandula stoechas L. · French lavender
Syngenta Crop Protection AG
LC NO6
ActiveHydrangea paniculata Siebold · Panicled hydrangea
Alex Frederick Schoemaker
Kercaltan
ActiveCalendula officinalis x Calendula suffruticosa
Priscilla Grace Kerley, David William Kerley, Timothy Edward Kerley, Sarah Elisabeth Kerley
Kerannawit
ActivePrimula elatior (L.) Hill · Oxlip
Kerley David William,Kerley Timothy Edward
LAVSD014
ActiveLavandula stoechas L. · French lavender
The Paradise Seed Company Pty Ltd
HP221905
ActiveHydrangea paniculata Siebold · Panicled hydrangea
Hydrangea Breeders Association B.V.
LABZ0006
ActiveLavandula stoechas L. · French lavender
Syngenta Crop Protection AG
Hortmaspoli
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Kolster Peter R. / Eveleens Cornelis P.
Kolmamon
ActiveHydrangea paniculata Siebold · Panicled hydrangea
Kolster Holding B.V.
Jos Eijking
Protection expiredEryngium L. · Sea holly
W A J RUIGROK
Ilvomono
ActiveViburnum plicatum Thunb. · Japanese snowball
van Laere Katrijn,van Huylenbroeck Johan
Hifla
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Roy Robin van Dijk
KLELV12071
ActiveLavandula stoechas L. · French lavender
Ruijun Li
HP221903
ActiveHydrangea paniculata Siebold · Panicled hydrangea
Hydrangea Breeders Association B.V.
Hbaroyalc
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.
KN30 8
ActiveCornus x elwinortonii T. Molnar & Struwe
Elwin R. Orton^^^DAVID A. GANT
HQOPR010
ActiveHydrangea quercifolia W. Bartram · Oakleaf hydrangea
Plant Select N.V.
HP221901
ActiveHydrangea paniculata Siebold · Panicled hydrangea
Hydrangea Breeders Association B.V.
HAOPR012
ActiveHydrangea aspera Buch.-Ham. ex D. Don · Rough-leaved hydrangea
Plant Select N.V.
IFHEMUL
ActiveHeuchera L. · Coral Flower
van den Haak Jelle