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- Title
Detection of novel QTLs qDTH4.5 and qDTH6.3, which confer late heading under short-day conditions, by SSR marker-based and QTL-seq analysis.
- Authors
Eri Ogiso-Tanaka; Tsuyoshi Tanaka; Keisuke Tanaka; Yasunori Nonoue; Takuji Sasaki; Erina Fushimi; Yohei Koide; Yutaka Okumoto; Masahiro Yano; Hiroki Saito
- Abstract
Heading date is one of the most important traits in rice breeding. It is governed by multiple genes, including known quantitative trait loci (QTLs). In general, almost all japonica cultivars, including Nipponbare, head early under short-day (SD) conditions, but some indica cultivars, including Kasalath, head late. To explain this difference, we identified QTLs controlling heading date under SD conditions. We used NILs, CSSLs, and BILs from a cross between Nipponbare and Kasalath, and evaluated days to heading (DTH) under SD conditions. No NILs or CSSLs showed late heading, but two BILs (BIL-55 and BIL-78) had almost the same DTH as Kasalath. We developed an F2 population from a cross between BIL-55 and Nipponbare and performed QTL analysis using SSR markers. The late-heading phenotype was controlled by two known genes and at least two novel QTLs on chromosomes 4 and 6, named qDTH4.5 and qDTH6.3. These QTLs were confirmed by QTL-seq. The QTLs and polymorphisms detected here will provide useful information for further genetic studies and breeding under SD conditions at lower latitudes.
- Subjects
CROSSBREEDING; CULTIVARS; RICE breeding; TRINUCLEOTIDE repeats; BOTANY
- Publication
Breeding Science, 2017, Vol 67, Issue 2, p101
- ISSN
1344-7610
- Publication type
Article
- DOI
10.1270/jsbbs.16096