Estimating the Breeding Potential of Purple Sweet Corn Lines with Topcross Mating Design

Authors : Ahmet ÖZTÜRK, Bülent UZUN

Pages : 63-71

Doi:10.16882/hortis.1125548

View : 16 | Download : 9

Publication Date : 2022-06-13

Article Type : Research Paper

Abstract :The estimation of breeding potential of early generation lines is a prerequisite in corn breeding. Breeders could use a methodology called topcross for this purpose. The present study aimed insert ignore into journalissuearticles values(i); to investigate the breeding potential of purple sweet corn lines with topcross design, and insert ignore into journalissuearticles values(ii); to determine correlation between fresh ear yield and yield traits in topcross hybrids insert ignore into journalissuearticles values(TH);. Hundred and eighteen S2 generation purple sweet corn lines were crossed with the tester, the Ant-224-E-1 yellow sweet corn inbred lines in isolated cross block insert ignore into journalissuearticles values(ICB);, in Antalya in 2020. Hundred and twenty-one hybrids insert ignore into journalissuearticles values(118 topcross hybrids and 3 commercial hybrid controls); were obtained and analyzed with an 11 × 11 triple lattice design in 2021. It was determined that the number of days to anthesis insert ignore into journalissuearticles values(DtoA);, plant height insert ignore into journalissuearticles values(PH);, ear height insert ignore into journalissuearticles values(EA);, general plant appearance insert ignore into journalissuearticles values(PA); and fresh ear yield insert ignore into journalissuearticles values(FEY); were statistically significant at P < 0.001 across the hybrids. The DtoA, PH, EH, PA and FEY varied between 90.7-103.0 days, 105.6-217.9 cm, 38.2-77.9 cm, 1.7-3.7 scores, and 4970.2-13472.9 kg ha-1, respectively. Sixty-three topcross hybrids exhibited higher FEY when compared to the trial average. While 16 PSC lines exhibited statistically significant positive general combining ability insert ignore into journalissuearticles values(GCA); for FEY, 20 PSC lines exhibited negative GCA for FEY. Eighteen PSC lines were selected based on 15% selection intensity and yield trait criteria. It was determined that these lines had a significant PSC hybrid potential as parents in future PSC breeding programs.
Keywords : Combaining ability, Fresh ear yield, Purple sweet corn, S2 lines, Topcross