
Characteristics, Genetic Analysis, and Application of the Rice Two-Line Sterile Line Xin 32061S
Received date: 2026-01-28
Online published: 2026-07-14
Using the thermo-sensitive genic male sterile (TGMS) donor Y58S and the restorer line Tefeng 2053 as parents, the two-line sterile line Xin 32061S was successfully developed through multi-generational selfing purification and directional selection. This sterile line is classified as a TGMS line, with a fertility transition critical temperature of approximately 23.5 ℃ and a stable sterile period lasting over 40 days. Xin 32061S exhibits excellent agronomic traits, including approximately 175 spikelets per panicle. It possesses well-developed stigma morphology, characterized by a surface area of 11.49 mm2, a volume of 1.15 mm3, and a total exsertion rate of 68.5%. Furthermore, pollen round abortion is nearly absent, indicating high potential for outcrossing seed-setting. Genetic background analysis using gene chips revealed a high homozygosity rate of 99.43%. Genomic analysis indicated that Xin 32061S contains 14.42% japonica rice genetic components, representing a novel indica rice germplasm with a stable genetic background that integrates elite japonica genes. In addition to carrying the core TGMS gene tms5, this line aggregates multiple genes associated with superior traits. These include yield-related genes (Gn1a/OsCKX2, LSCHL4, GW8/OsSPL16), grain shape-related genes (GS3, OsCYP704A3), ideal plant architecture genes (D2/CYP90D2/SMG11, D61/OsBRI1), and resistance genes (LHCB5, Xa26/Xa3). Based on this sterile line, five hybrid rice combinations have been successfully developed. Among them, Xinliangyou 9328 and Xinliangyou 905 have passed the National Rice Variety Approval; meanwhile, Xinliangyou 6198, Xinliangyou 6112, and Xinliangyou Xiangzhan are currently undergoing regional and production trials in the Lower-Middle Yangtze River region and Henan Province, demonstrating broad application prospects.
HAN Rong, SHEN Guanghui, FU Ding, CHANG Xingyuan, HUO Erwei, ZHANG Kaixuan, XU Shiku, GUO Guiying, HU Yang, LI Gexing, YU Linchuang, CHEN Qingming, TAO Congwang . Characteristics, Genetic Analysis, and Application of the Rice Two-Line Sterile Line Xin 32061S[J]. China Rice, 2026 , 32(4) : 97 -101 . DOI: 10.3969/j.issn.1006-8082.2026.04.016
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