Variety traits
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.
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.
Brassica napus var. napus · Rapeseed
BUSCH| Dipl.Ing.agr. Heiner Busch in Fa. Deutsche Saatveredelung AG / HAUSKA| Dipl. Ing. agr. Detlef Hauska
Secale cereale L. · Rye
Breus Oksana Serhiivna, Parii IUliia Oleksandrivna, Solomenko Andrii Ivanovych, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych, Skoryk Olena Mykolaivna, Symonenko Nina Viktorivna, Skoryk Olha Pavlivna, Skoryk Volodymyr Viktorovych,
Brassica napus L. · Rapeseed
Nilsson, Bengt
Zea mays L. · Maize
Maize Research Institute - Kneja (BG)
Zea mays L. subsp. mays (Maize Group) · Maize
C.S.I.C. (MADRID)
Zea mays L. subsp. mays (Maize Group) · Maize
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Zea mays L. subsp. mays (Maize Group) · Maize
INIA/X.GALICIA
Helianthus annuus L. · Sunflower
DEKALB PLANT GENETICS
Zea mays L. · Maize
Haidash Oleksandr Leonidovych, Cherchel Vladyslav IUriiovych, Dziubetskyi Borys Volodymyrovych,
Helianthus annuus L. · Sunflower
CECOSA
Triticum aestivum L. · Bread wheat
Ets Claude Camille Benoist SA (FR)
Zea mays L. subsp. mays (Maize Group) · Maize
Hodowla Roslin Smolice Sp.z o.o Grupa IHAR
Nicotiana tabacum L. · Tobacco
Havryliuk Oleh Stepanovych, Havryliuk Nadiia Ivanivna, Paschenko Volodymyr Ivanovych, Yurechko Anatolii Anatoliiovych, Bialkovs`ka Hanna Dmytrivna,
Zea mays L. · Maize
Penka Hristova, Kiril Hristov
Secale cereale L. · Rye
Skoryk Olena Mykolaivna, Symonenko Nina Viktorivna, Skoryk Olha Pavlivna, Skoryk Volodymyr Viktorovych,
Secale cereale L. · Rye
Yehorov Dmytro, Tsyhanko Viktor, Dryl Valentyna, Oliinyk Oleksandr, Shtefan Oleksii, Zmiievska Olena, Demianenko Svitlana, Batsaieva Rita
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Berries Del Oeste S.L.
Cyclamen persicum Mill. x C. purpurascens Mill.
DR ALOMA EWALD
Secale cereale L. · Rye
Skoryk Olena Mykolaivna, Symonenko Nina Viktorivna, Skoryk Volodymyr Viktorovych,
Zea mays L. · Maize
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Triticum aestivum L. subsp. aestivum · Bread wheat
Zea mays L. · Maize
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium