Influence of pollination variants on the dynamics of pollen tubes growth and the fruits set in plum cv Čačanska lepotica

Abstract

The initial fruits set as well as the correlation between the dynamics of pollen tubes growth and the numbers of initially fruits set in cv Čačanska Lepotica were studied in this investigation were studied. The study included three variants of fertilization, i.e. open-, cross-(pollen of Čačanska Najbolja), and self-pollination. The largest percentage of the fruits set was recorded in the cross-pollination variant in both years. The lowest percentage of the fruits set in the first year was in selfpollination variant, while in the second year it was recorded in open-pollination variant. The results for the coefficient of linear correlation in both years show high correlation between the dynamics of pollen tubes growth and the number of initially fruits set in cross and self-pollinated variants. In open-pollination variant coefficient of correlation was in the rang of low correlation. The largest coefficient of linear correlation between the dynamics of pollen tubes growth and the numbers of initially fruits set was in cross-pollination variant (with cv Čačanska Najbolja), which is another positive confirmation effect of cross- pollination on the fruits set.

U radu je utvrđen broj inicijalno zametnutih plodova kao i korelacija između dinamike rasta polenovih cevčica i broja inicijalno zametnutih plodova kod sorte šljive Čačanska lepotica u tri varijante oprašivanja: slobodno, samo- i stranooprašivanje (polenom sorte Čačanska najbolja). U obe godine ispitivanja najveći procenat zametnutih plodova bio je u varijanti stranooprašivanja. Najmanji procenat zametnutih plodova u prvoj godini ispitivanja bio u varijanti samooprašivanja, a u drugoj godini u varijanti slobodnog oprašivanja. Dobijeni rezultati koeficijenta linearne korelacije za obe godine ispitivanja pokazuju da u varijantama stranooprašivanja i samooprašivanja postoji visoka korelacija između dinamike rasta polenovih cevčica i broja inicijalno zametnutih plodova. U varijanti slobodnog oprašivanja koeficijent korelacije se kretao u rangu slabe korelacije.