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- Title
Genetic and phenotypic assessment of sugar beet (Beta vulgaris L. subsp. vulgaris) elite inbred lines selected in Japan during the past 50 years.
- Authors
Kazunori Taguchi; Yosuke Kuroda; Kazuyuki Okazaki; Masanori Yamasaki
- Abstract
Genetic diversity of Japanese sugar beet elite inbred line diversity (JSBD1V) set consisting of 63 lines was investigated using 33 cleaved amplified polymorphic sequence and 38 simple sequence repeat analyses. JSBDIV set was significantly subdivided into six (pedigree information), seven (Neighbor-Joining method) or 12 (population structure analysis) groups. The highest value of a pairwise population differentiation estimate, ØPT value, among groups was yielded from population structure analysis with explained variation 32%. Some of the groups defined in this study exhibited close association with ancestral open-pollinated varieties (OPVs), suggesting that inter-OPV cross was rare during the establishment of JSBDIV set. On the other hand, low 0 PT values between some groups suggest that genetic backgrounds of ancestral OPVs had historically overlapped to some extent. Phenotypic traits showed significant differences both among and within groups. A nearly identical group wfas identified as the highest sugar content group irrespective of the grouping methods. Groups with Aphanomyces root rot resistance are associated with an OPV ‘Tmm-l’, suggesting it as a source of this trait. ‘Tmm-1 ’ is also associated with Cercospora leaf spot resistance, but an exceptional resistant line with no association of ‘Tmm-1 ’ supports a notion that different genetic resources exist for this trait.
- Subjects
JAPAN; BEETS; SUGAR beets; MICROSATELLITE repeats; POPULATION differentiation; GERMPLASM; ROOT rots
- Publication
Breeding Science, 2019, Vol 69, Issue 2, p255
- ISSN
1344-7610
- Publication type
Article
- DOI
10.1270/jsbbs.18121