Reselection of parental genotypes of an elite hybrid for yield and its components

Abstract

The aim of this study was to identify which of different lines may be useful as donors of favorable alleles in the improvement of the quantitative traits of the elite single cross hybrid. The fruit length, fruit diameter, number of locules per a fruit, pericarp thickness, the number of fruit per plant, fruit weight and fruit weight per plant were investigated. Yield components in six lines and their nine hybrids were determined on the basis of three-replicate field trials set up according to the randomized block design in 2000. The line, Kz-13 showed positive or negative and significant mG values of all traits. This line expressed the highest significant value of this parameter for a number of locales per a fruit, number of fruit per plant and the fruit weight and could be useful in the improvement of these traits. This line was more closely related to the parent of the elite hybrid Au-09. The mutual improvement of these traits could be performed by backcrossing the hybrid B-99 x Au-09 to the P2 (Au-09) or to donors (Ma-127, M-29, ZJ-17, Kz-13). Obtained results suggest that lines could be used as donors of favorable alleles for the improvement of yield components of an elite hybrid. The best potential donors for the improvement of the elite hybrid B-99 x Au-09 were estimated on the basis of results gained on observed lines.

Cilj ovih istraživanja bio je da se odrede genotipovi koji mogu biti korišćene kao donori poželjnih alela za poboljšanje kvantitativnih svojstava elitnog hibrida paradajza. Izučavana su sledeća svojstva: dužina ploda, prečnik ploda, broj komora ploda, debljina perikarpa, broj plodova po biljci, masa ploda i masa ploda po biljci. Komponente prinosa šest genotipova (B-99, Ma-127, M-29, ZJ-17, Kz-13 i Au-09) i njihovih hibrida koji su dobijeni po m x n sistemu su izučavane na bazi poljskih ogleda u tri ponavljanja tokom 2000. godine po slučajnom blok sistemu. Linija Kz-13 je pokazala pozitivne ili negativne i značajne mG vrednosti za sva svojstva. Ova linija je ispoljila najviše i najznačajnije vrednosti ovog parametra za broj komora ploda, broj plodova po biljci i masu ploda. Srodnija je bila sa Au-09 roditeljem elitnog hibrida. Poboljšanje ovih svojstava zajedno može biti izvedeno povratnim ukrštranjem hibrida B-99 x Au-09 sa P2 (Au-09) ili donorima (Ma-127, M-29, ZJ-17, Kz-13). Ovi rezultati ukazuju da genotipovi mogu biti korišćene kao donori poželjnih alelela za poboljšanje komponentata prinosa elitnog hibrida. Na bazi rezultata linija pronađeni su najbolji potencijalni donori za poboljšanje elitnog hibrida B-99 x Au-09.