Sugar Plum
ActiveVerbascum L. · Mullein
Korlipara Harini|Canby, OR, US
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.
Sugarberry Ruffles
ActiveLavandula stoechas L. · French lavender
Plant Growers Australia Pty Ltd
Sophia
ActiveCoreopsis L. · Tickseed
Probst Darrell R
Silver Lining
ActiveHydrangea anomala D. Don subsp. petiolaris (Siebold & Zucc.) E. M. McClint. · Climbing hydrangea
Huisman Nico
Savill Lace
ActiveHydrangea paniculata Siebold · Panicled hydrangea
Kraan Kees Jan
Rensam
ActiveHydrangea paniculata Siebold · Panicled hydrangea
Renault Jean
Saxtabdar
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Meinl Katrin
Saxcanhea
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Meinl Katrin
RD06
ActiveHelleborus x hybridus hort. ex Voss · Lenten rose
RODNEY DAVEY|LYNDA WINDSOR
Saxbrired
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Meinl Katrin
Rencri
ActiveHydrangea paniculata Siebold · Panicled hydrangea
Renault Jean
Red Lark
ActiveDelphinium L. · Larkspur
Legro Robert A. H. / Kievit Christa / Eisenreich Robert B.
RD09
ActiveHelleborus x hybridus hort. ex Voss · Lenten rose
RODNEY DAVEY|LYNDA WINDSOR
Purplepac
Activehybrids between Prunus davidiana, Prunus dulcis and Prunus persica
Pinochet Jorge|Barcelona, ES
Red Elf
ActiveCoreopsis L. · Tickseed
Probst Darrell R
Pmoore12
ActiveBuddleja x pikei H. R. Fletcher
Peter R. Moore
Pleasant Feelings
ActivePhlox paniculata L. · Garden phlox
RENÉ VAN GAALEN
Pac 941
ActivePrunus cerasifera x Prunus dulcis
Pinochet Jorge|Barcelona, ES
Perfrie
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Orange Torch
ActiveBerberis thunbergii DC. · Japanese barberry
Pineau Patrick
Minsycbb2b
ActiveHibiscus syriacus L. · Rose of Sharon
Hortival Diffusion SAS
LC NO8
ActiveHydrangea paniculata Siebold · Panicled hydrangea
Schoemaker Alex Frederick
LC NO22
ActiveHydrangea arborescens L. · Smooth hydrangea
Schoemaker Alex F.
LISSJUDY
ActiveHydrangea paniculata Siebold · Panicled hydrangea
Peter Catt