Abstract

The author presents the results of determining the self-fertility degree of forty pear cultivars, including the varieties and elite forms bred in Melitopol and those introduced, when pollinating with own pollen. That simulates the conditions of pollination in single-variety orchards. The analysis of the data obtained when studying while infructescense, showed that the varieties Forel zymova, Devo, Triumf Pakgama, Melitopolska 4103, Levavasser, Serpneva, Kiure, Kook Starking, Vesta, Yuzhanka turned out to be self-fertile ones. Four autogamous varieties, namely: Melitopolska 4103, Cook Starking, Devo and Triumph Pakgama appeared to possess the highest percentage of the actual fruit-setting, while the two latest ones – even high homeostatic coefficient concerning the relative fruits mass per 100 pollinated flowers. ‘Vesilna’, ‘Pryiemna’, ‘Doctor Til’, Kirgizskaia zimniaia’ proved to be self-sterile varieties.

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