Background

A cytoplasm of CW-type cytoplasmic male sterile (CMS) line is derived from Oryza rufipogon strain W1 and fertility is restored by a single nuclear gene, Rf17. We have previously reported that CW-CMS were effective for breeding CMS lines of Indica Group rice cultivars, IR 24 and IR 64. The applicability of this CW-CMS/Rf17 system to produce other elite Indica Group rice cultivars with CMS was explored.

Findings

Out of seven elite Indica Group rice cultivars, complete CMS lines were obtained for six cultivars: NSIC Rc 160, NSIC Rc 240, Ciherang, BRRI dhan 29, NERICA-L-19, and Pusa Basmati. The fertility of these six lines was restored when Rf17 was present. A CMS line was not obtained for the cultivar Samba Mahsuri.

Conclusions

The CW-CMS/Rf17 system will be useful to produce CMS lines and restorer lines of various elite Indica Group rice cultivars.

中文翻译：

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利用CW-CMS / Rf17系统开发各种In稻优种的细胞质雄性不育系和恢复系。

背景

CW型细胞质雄性不育（CMS）线的细胞质来源于普通野生稻应变W1和生育是由单个核基因，恢复Rf17。之前我们已经报道，CW-CMS是有效的育种籼组水稻品种，IR 24和IR 64.这CW-CMS /的适用性不育系Rf17系统产生其他籼稻组水稻品种CMS进行了探讨。

发现

在七个Indica Group优良水稻品种中，针对六个品种获得了完整的CMS系：NSIC Rc 160，NSIC Rc 240，Ciherang，BRRI dhan 29，NERICA-L-19和Pusa Basmati。当存在Rf17时，这六个品系的育性得以恢复。对于Samba Mahsuri品种没有获得CMS系。

结论

CW-CMS / Rf17系统将用于生产各种Indica Group优良水稻品种的CMS系和恢复系。