Genetic characterization and fine mapping of a novel thermo-sensitive genic male-sterile gene tms6 in rice (Oryza sativa L.)

Inheritance of fertility restoration was studied in crosses involving ten elite restorer lines of rice viz. BR6839-41-5-1R, BR7013-62-1-1R, BR7011-37-1-2R, BR10R, BR11R, BR12R, BR13R, BR14R, BR15R and BR16R and one male sterile line Jin23A with WA sources of cytoplasmic male sterility. The segregation pattern for pollen fertility of F2 and BC1 populations of crosses involving Jin23A indicated the presence of two independent dominant fertility restoring genes. The mode of action of the two genes varied in different crosses revealing three types of interaction, i.e. epistasis with dominant gene action, epistasis with recessive gene action, and epistasis with incomplete dominance.DOI: http://dx.doi.org/10.3329/bjpbg.v24i1.16997

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Determination of genetic relationships among elite thermosensitive genic male sterile lines (TGMS) of rice (Oryza sativa L.) employing morphological and simple sequence repeat (SSR) markers

Journal of Genetics ◽

10.1007/s12041-011-0018-5 ◽

2011 ◽

Vol 90 (1) ◽

pp. 11-19 ◽

Cited By ~ 8

Author(s):

VIKAS KUMAR SINGH ◽

PRITI UPADHYAY ◽

PALLAVI SINHA ◽

ASHISH KUMAR MALL ◽

SANJAY KUMAR JAISWAL ◽

...

Keyword(s):

Oryza Sativa ◽

Ssr Markers ◽

Simple Sequence Repeat ◽

Oryza Sativa L ◽

Genetic Relationships ◽

Sequence Repeat ◽

Male Sterile ◽

Simple Sequence

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SYL3-k increases style length and yield of F1 seeds via enhancement of endogenous GA4 content in Oryza sativa L. pistils

Theoretical and Applied Genetics ◽

10.1007/s00122-021-03968-y ◽

2021 ◽

Author(s):

Xiaojing Dang ◽

Yuanqing Zhang ◽

Yulong Li ◽

Siqi Chen ◽

Erbao Liu ◽

...

Keyword(s):

Oryza Sativa ◽

Northern Hemisphere ◽

Sequence Data ◽

Oryza Sativa L ◽

Mads Box ◽

Style Length ◽

Biological Mechanisms ◽

Male Sterile ◽

Male Sterile Line ◽

Major Factors

Abstract Key message SYL3-k allele increases the outcrossing rate of male sterile line and the yield of hybrid F1 seeds via enhancement of endogenous GA4 content in Oryza sativa L. pistils. The change in style length might be an adaptation of rice cultivation from south to north in the northern hemisphere. Abstract The style length (SYL) in rice is one of the major factors influencing the stigma exertion, which affects the outcross rate of male sterile line and the yield of hybrid F1 seeds. However, the biological mechanisms underlying SYL elongation remain elusive. Here, we report a map-based cloning and characterisation of the allele qSYL3-k. The qSYL3-k allele encodes a MADS-box family transcription factor, and it is expressed in various rice organs. The qSYL3-k allele increases SYL via the elongation of cell length in the style, which is associated with a higher GA4 content in the pistil. The expression level of OsGA3ox2 in pistils with qSYL3-k alleles is significantly higher than that in pistils with qSYL3-n allele on the same genome background of Nipponbare. The yield of F1 seeds harvested from plants with 7001SSYL3−k alleles was 16% higher than that from plants with 7001SSYL3−n allele. The sequence data at the qSYL3 locus in 136 accessions showed that alleles containing the haplotypes qSYL3AA, qSYL3AG, and qSYL3GA increased SYL, whereas those containing the haplotype qSYL3GG decreased it. The frequency of the haplotype qSYL3GG increases gradually from the south to north in the northern hemisphere. These findings will facilitate improvement in SYL and yield of F1 seeds henceforward.

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