Combining ability of early-maturing varieties of soft spring wheat by grain weight from the ear

Federal State Institutions Federal Research Centre Tyumen Scientific Centre of Siberian Branch of the Russian Academy of Sciences (Tyumen Scientific Centre SB RAS)

^* Corresponding author: tatyanka.leonova.2020@bk.ru

Abstract

With the participation of early-maturing varieties, a topcross scheme of crossings was performed (10×4); maternal varieties: Pamyati Azieva, Altayskaya 92, Obskaya 14, SURENTa-6, Adeline, SURENTa-3, Voronezhskaya 12, Tyumenskaya rannyaya, Tulun 15, Tyumenskaya 27; testers - Iren, Novosibirskaya 15, Latona, Tulunskaya 12. In 2007, the Pamyati Azieva and Iren had a more productive ear – 0.88 g, in the dry year of 2008 - SURENTa-6, Adeline and Tulun 15 (0.80-0.82). The following strongly react to drought: Voronezhskaya 12, Tyumenskaya rannyaya, Iren, Latona, Novosibirskaya 15 (0.49-0.64 g). The Pamyati Azieva and SURENTa-3 are distinguished by increased CCA. Varieties with multidirectional CCA are recommended for synthetic breeding. SCA is distinguished in: Tyumenskaya rannyaya, SURENTa-3, in better conditions – SURENTa-6, Adeline, Iren, Tulunskaya 12, which allows them to be used in recombination breeding. Varieties with low indicators of CCA and SCA - Altayskaya 92, Obskaya 14, Tulun 15, Tyumenskaya 27 and Latona, are ineffective in breeding for productivity. The heterosis effect on the trait was manifested in 15-20% of the combinations, more significant in arid conditions.