Development of chromosome segment substitution lines harboringOryza nivaragenomic segments in Koshihikari and evaluation of yield-related traits.
Chromosome segment substitution lines (CSSLs) are rich genetic resources that can be mined for novel, agriculturally useful loci or that can be used directly as materials for breeding. To date, a number of rice CSSLs have been developed by crossing rice cultivars with its wild relatives as a means to tap into the potential of wild alleles in rice improvement.Oryza nivarais a wild relative of rice that is thought to be a progenitor ofO. sativaspp.indica. In the present study, 26 CSSLs that covers the entire genome ofO. nivaraas contiguous, overlapping segments in the genomic background of ajaponicacultivar,O. sativacv. Koshihikari were developed. Evaluation of the CSSLs for several agriculturally important traits identified candidate chromosome segments that harbors QTLs associated with yield and yield-related traits. The results of the study revealed the potential ofO. nivaraas a source of novel alleles that can be used to improve the existingjaponicacultivar.
Bioscience and Biotechnology Center, Nagoya University , Chikusa, Nagoya, Aichi 464-8601 , Japan.
Tomoyuki
T
Furuta
Bioscience and Biotechnology Center, Nagoya University , Chikusa, Nagoya, Aichi 464-8601 , Japan.
Kanako
K
Uehara
Bioscience and Biotechnology Center, Nagoya University , Chikusa, Nagoya, Aichi 464-8601 , Japan.
Rosalyn B
RB
Angeles-Shim
Bioscience and Biotechnology Center, Nagoya University , Chikusa, Nagoya, Aichi 464-8601 , Japan.
Junghyun
J
Shim
Bioscience and Biotechnology Center, Nagoya University , Chikusa, Nagoya, Aichi 464-8601 , Japan.
Keisuke
K
Nagai
Bioscience and Biotechnology Center, Nagoya University , Chikusa, Nagoya, Aichi 464-8601 , Japan.
Motoyuki
M
Ashikari
STAY GREEN Co., Ltd. , 2-1-5 Kazusa-Kamatari, Kisarazu, Chiba 292-0818 , Japan.
Tomonori
T
Takashi
Oryza nivara; chromosome segment substitution lines (CSSLs)