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.

Sources10

Breakdown by crop

Found in these crops

Bigleaf hydrangea 278 Tea-of-heaven 104 Panicled hydrangea 94 Sunflower 77 Maize 74 Rapeseed 69 Sugar beet 64 Hydrangea 38 Rye 26 Rapeseed 22 French lavender 21 Apple 20

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.

Duet

Terminated

Sorghum bicolor (L.) Moench · Sorghum

1 record

Dr. Jean Varnier

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Dr. Varnier? R. Mallet?

1 record

Dragonfly

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Wädenswil

1 record

Hatsushimo

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Japan

1 record

Hyuga ao

Active

Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven

No information of breeder available for this variety

1 record

Harrys Souvenir

Active

Hydrangea paniculata Siebold · Panicled hydrangea

Information regarding the breeder received in the contribution to CPVO :Van de Laar H.

1 record

Hanabi

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Yamamoto Takeomi

1 record

H1938 1 CMS

Active

Brassica napus L. · Rapeseed

1 record

Hime-Gaku

Active

Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven

No information of breeder available for this variety

1 record

Great Escape

Active

Hydrangea paniculata Siebold · Panicled hydrangea

Information regarding the breeder received in the contribution to CPVO :Darthuizer

1 record

Dompfaff

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Wädenswill

1 record

Golden Fragrance

Active

Muscari · Grape hyacinth

1 record

Degustar

Active

Hydrangea paniculata Siebold · Panicled hydrangea

Information regarding the breeder received in the contribution to CPVO :Kolster

1 record

Fireworks

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Yamamoto Takeomi

1 record

Green Spire

Active

x Cuprocyparis leylandii (A. B. Jacks. & Dallim.) Farjon · Leyland cypress

1 record

Ellen Huff

Active

Hydrangea quercifolia W. Bartram · Oakleaf hydrangea

No information of breeder available for this variety

1 record

Crystal Blue

Protection expired

Leucocoryne Lindl. · Glory of the Sun

1 record

G2873 CMS

Terminated

Brassica napus var. napus · Rapeseed

1 record

Fuji Snowstorm

Active

Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven

No information of breeder available for this variety

1 record

D 514

Terminated

Triticum durum Desf. · Durum wheat

1 record

Emerald Lace

Active

Hydrangea arborescens L. · Smooth hydrangea

Information regarding the breeder received in the contribution to CPVO :Tyson S.

1 record

Ekster

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Wädenswil

1 record

Feu dartifice

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Yamamoto Takeomi

1 record

Florencia cms(S)

Active

Zea mays L. · Maize

1 record

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Variety traits

Maturity group 89 063
Yield 67 000
Vigor 53 548
Plant height 51 504
Lodging 50 198
Taste and aroma 36 010
Variety origin 29 523
Productivity 27 845

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.