Document Type : Scientific - Research
Authors
1
Associate Professor of Sugar Beet Seed Institute (SBSI) - Associate professor of Sugar Beet Seed Institute (SBSI), Agricultural Research, Education, and Extension Organization (AREEO), Karaj, Iran.
2
Assitant Professor, Sugar Beet Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
3
Associate Professor, Mashhad Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Khorasan Razavi, Iran
4
Shiraz Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Fars, Iran
10.22092/jsb.2026.371078.1399
Abstract
Estimation of combining ability and identify heterotic groups of sugar beet lines, this study was conducted using a graphical line × tester analysis method. Nineteen pollinators were crossed with five testers, and the 95 resulted hybrids were evaluated for root yield, sugar content, sugar yield, and resistance to Rhizomania. The results of the graphical analysis revealed distinct heterotic patterns of lines for root yield and sugar yield traits. For root yield, line L03 was the best combiner for testers T01, T02, and T03, while line L17 was the best combiner for testers T04 and T05. Regarding to sugar content, line L09 showed the highest combining ability with tester T03, and line L03 exhibited the best performance with four testers T01, T02, T04, and T05. For sugar yield, line × tester interaction pattern indicated that lines L03, L05, and L18 shoed a good combination with testers T01, T02, T04, and T05, whereas lines L09 and L10 displayed highest specific combining ability (SCA) with tester T03. Furthermore, in the overall evaluation, lines L03 and L05 possessed the highest general combining ability (GCA). In case of Rhizomania resistance, crosses of line L09 with tester T03, line L14 with testers T02 and T05, line L13 with tester T04 and line L15 with tester T01 were identified as the best combination of resistance based on specific combining ability (SCA). The results demonstrated that lines L03 and L05 have significant potential for use in breeding programs due to their high GCA.
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