Identification of quantitative trait loci for grain quality in an advanced backcross population derived from the Oryza sativa variety IR64 and the wild relative O. rufipogon

2003 ◽  
Vol 107 (8) ◽  
pp. 1433-1441 ◽  
Author(s):  
E. M. Septiningsih ◽  
K. R. Trijatmiko ◽  
S. Moeljopawiro ◽  
S. R. McCouch
Keyword(s):  
Oryza Sativa ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Grain Quality ◽  
Wild Relative ◽  
Backcross Population ◽  
Advanced Backcross ◽  
Advanced Backcross Population ◽  
Trait Loci

QTL detection for rice grain quality traits using an interspecific backcross population derived from cultivated Asian (O. sativa L.) and African (O. glaberrima S.) rice

Genome ◽  
2004 ◽  
Vol 47 (4) ◽  
pp. 697-704 ◽  
Author(s):  
Jiming Li ◽  
Jinhua Xiao ◽  
Silvana Grandillo ◽  
Longying Jiang ◽  
Yizhen Wan ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Grain Quality ◽  
Brown Rice ◽  
Oryza Glaberrima ◽  
Rice Grain ◽  
Backcross Population ◽  
Advanced Backcross ◽  
Kernel Length ◽  
Trait Loci

An interspecific advanced backcross population derived from a cross between Oryza sativa 'V20A' (a popular male-sterile line used in Chinese rice hybrids) and Oryza glaberrima (accession IRGC No. 103544 from Mali) was used to identify quantitative trait loci (QTL) associated with grain quality and grain morphology. A total of 308 BC3F1 hybrid families were evaluated for 16 grain-related traits under field conditions in Changsha, China, and the same families were evaluated for RFLP and SSR marker segregation at Cornell University (Ithaca, N.Y.). Eleven QTL associated with seven traits were detected in six chromosomal regions, with the favorable allele coming from O. glaberrima at eight loci. Favorable O. glaberrima alleles were associated with improvements in grain shape and appearance, resulting in an increase in kernel length, transgressive variation for thinner grains, and increased length to width ratio. Oryza glaberrima alleles at other loci were associated with potential improvements in crude protein content and brown rice yield. These results suggested that genes from O. glaberrima may be useful in improving specific grain quality characteristics in high-yielding O. sativa hybrid cultivars.Key words: quantitative trait loci (QTL), grain quality, molecular markers, O. sativa, O. glaberrima.

scholarly journals Mapping Quantitative Trait Loci for Heading Date and Awn Length Using an Advanced Backcross Line from a Cross between Oryza sativa and O. minuta

2006 ◽  
Vol 56 (4) ◽  
pp. 341-349 ◽  
Author(s):  
Le-Hung Linh ◽  
Feng-Xue Jin ◽  
Kyung-Ho Kang ◽  
Young-Tae Lee ◽  
Soo-Jin Kwon ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Heading Date ◽  
Advanced Backcross ◽  
Backcross Line ◽  
Trait Loci
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