Hywin
ActiveTriticum aestivum L. · Bread wheat
Saaten Union, F
FR
5 records
Variety traits
Heterosis
Heterosis is the effect of first-generation hybrids superiority over parental forms in terms of viability, productivity, and resistance to external factors.
Mentioned in descriptions 472 varieties reference book.
Heterosis, often referred to as "hybrid vigor", manifests in the superiority of first-generation hybrids over parental forms in key biological and economic traits. The effect is most noticeable in quantitative traits with low heritability, such as growth energy, fertility, adaptability, and total yield. A characteristic feature is its maximum expression exclusively in the first generation, with a gradual attenuation in subsequent ones, which precludes the use of hybrid seeds for further sowing.
The evaluation of heterosis is carried out quantitatively through the percentage excess of the hybrid's indicators relative to parents or standards. A distinction is made between true heterosis, comparing the hybrid with the best parent; hypothetical heterosis, based on the average value of both parents; and competitive heterosis, where the best variety currently on the market is taken as a baseline. The stability of this effect depends on the combining ability of the parental lines and specific agro-climatic growing conditions.
Within the framework of variety testing, the success of a hybrid is determined by a complex of economically valuable traits and an analysis of its performance in field conditions. The lack of superiority or indicators lower than parental forms are qualified as the absence of heterosis or depression. The relative values of the effect vary depending on the crop, with high indicators reaching tens of percent confirming the efficiency of the chosen combination of parental forms.
Breakdown by crop
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.
Belmont
ActiveHordeum vulgare L. · Barley
Syngenta Participations AG
NL
7 records
PH5DR
ActiveZea mays L. · Maize
PIONEER HI-BRED INTERNATIONAL
Hyola 401
ActiveBrassica napus var. napus · Rapeseed
BUZZA| Greg Buzza c/o Zeneca Seeds / STOENESCU| Florin Stoenesu c/o Zeneca Seeds
DE
7 records
Hyno-Rista
TerminatedTriticum aestivum L. · Bread wheat
Hybrinova Sa (FR)
FR
4 records
HYNO RENTA
TerminatedTriticum aestivum L. · Bread wheat
DuPont de Nemours Hybrinova (FR)
FR
4 records
XF 4919
WithdrawnHelianthus annuus L. · Sunflower
PIONEER HI-BRED INTERNATIONAL
ES
IT
2 records
KC 4647
ActiveZea mays L. · Maize
Maize Research Institute - Kneja (BG)
BG
3 records
Arum
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
SESVANDERHAVE, N.V./S.A.
ES
FR
3 records
LID3260C
ActiveZea mays L. · Maize
Euralis Semences
IT
SI
5 records
LMH3161
ActiveZea mays L. · Maize
Mas Seeds S.A.S.
UA
4 records
Garibaldo
TerminatedSecale cereale L. · Rye
LOCHOW| KWS LOCHOW GMBH
DE
DK
3 records
SU Hylord
ActiveTriticum aestivum L. · Bread wheat
ASUR Plant Breeding S.A.S
FR
5 records
Salgemma
ActiveTriticum aestivum L. · Bread wheat
CREA-CENTRO DI RICERCA INGEGNERIA E TRASFORMAZIONI AGROALIMENTARI (CREA-IT-RM)
IT
3 records
Nexera 3155
ActiveTriticum aestivum L. · Bread wheat
Primož Titan
SI
3 records
LG Alpha
ActiveTriticum aestivum L. · Bread wheat
Limagrain Europe S.A.S
DE
4 records
Klote
TerminatedPoa pratensis L. · Kentucky bluegrass
Lietuvos agrarinių ir miškų mokslų centro filialas Žemdirbystės institutas
LT
3 records
Hyxtra
ActiveTriticum aestivum L. · Bread wheat
Saaten Union Recherche (FR)
FR
3 records
Hyspeed
TerminatedTriticum aestivum L. · Bread wheat
Saaten Union Recherche (FR)
FR
3 records
Hynergy
TerminatedTriticum aestivum L. · Bread wheat
Saaten Union Recherche (FR)
FR
4 records
Hyena
ActiveTriticum aestivum L. · Bread wheat
NORDSAAT SAATZUCHT
DE
5 records
PHPJD
ActiveZea mays L. · Maize
PIONEER HI-BRED INTERNATIONAL
PHJ8R
ActiveZea mays L. · Maize
PIONEER HI-BRED INTERNATIONAL
PHH54
ActiveZea mays L. · Maize
PIONEER HI-BRED INTERNATIONAL