Mapping quantitative trait loci for yield components and morphological traits in an advanced backcross population between Oryza grandiglumis and the O. sativa japonica cultivar Hwaseongbyeo

2006 ◽  
Vol 112 (6) ◽  
pp. 1052-1062 ◽  
Author(s):  
D.-B. Yoon ◽  
K.-H. Kang ◽  
H.-J. Kim ◽  
H.-G. Ju ◽  
S.-J. Kwon ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Yield Components ◽  
Morphological Traits ◽  
Backcross Population ◽  
Japonica Cultivar ◽  
Advanced Backcross ◽  
Advanced Backcross Population ◽  
Trait Loci ◽  
Oryza Grandiglumis

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.

Quantitative trait loci underlying domestication- and yield-related traits in an Oryza sativa × Oryza rufipogon advanced backcross population

Genome ◽  
2008 ◽  
Vol 51 (9) ◽  
pp. 692-704 ◽  
Author(s):  
Lubin Tan ◽  
Peijiang Zhang ◽  
Fengxia Liu ◽  
Guijuan Wang ◽  
Sheng Ye ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Morphological Traits ◽  
Oryza Rufipogon ◽  
Cultivated Rice ◽  
Backcross Population ◽  
Genetic Characteristics ◽  
Significant Qtls ◽  
Trait Loci

To understand the genetic characteristics of the traits related to differentiation between cultivated rice and its wild progenitor, genetic factors controlling domestication- and yield-related traits were identified using a BC3F2 population derived from an accession of common wild rice (donor, Oryza rufipogon Griff.) collected from Yuanjiang, Yunnan province, China, and an indica cultivar, Teqing (recipient, Oryza sativa L.). A genetic linkage map consisting of 125 simple sequence repeat (SSR) markers was constructed. Based on the phenotypes of the 383 BC3F2 families evaluated in two environments, two domestication-related morphological traits, panicle shape and growth habit, were found to be controlled by single Mendelian factors. This implies that the recessive mutations of single genes controlling some morphological traits could have been easily selected during early domestication. By single-point analysis and interval mapping, 59 putative quantitative trait loci (QTLs) that influence 11 quantitative traits were detected at two sites, and 37.5% of the QTL alleles originating from O. rufipogon had a beneficial effect for yield-related traits in the Teqing background. Regions with significant QTLs for domestication- and yield-related traits were detected on chromosomes 1, 4, 5, 7, 8, and 12. Fine mapping and cloning of these domestication-related genes and QTLs will be useful in elucidating the origin and differentiation of Asian cultivated rice in the future.

Quantitative trait loci for yield components in oil palm (Elaeis guineensis Jacq.)

2001 ◽  
Vol 103 (8) ◽  
pp. 1302-1310 ◽  
Author(s):  
K. A. Rance ◽  
S. Mayes ◽  
Z. Price ◽  
P. L. Jack ◽  
R. H. V. Corley
Keyword(s):  
Quantitative Trait Loci ◽  
Oil Palm ◽  
Quantitative Trait ◽  
Yield Components ◽  
Elaeis Guineensis ◽  
Trait Loci ◽  
Elaeis Guineensis Jacq

Identification of Quantitative Trait Loci in Rice for Yield, Yield Components, and Agronomic Traits across Years and Locations

Crop Science ◽  
2007 ◽  
Vol 47 (6) ◽  
pp. 2403-2417 ◽  
Author(s):  
Yong-Gu Cho ◽  
Hyeon-Jung Kang ◽  
Jeom-Sig Lee ◽  
Young-Tae Lee ◽  
Sang-Jong Lim ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Yield Components ◽  
Agronomic Traits ◽  
Trait Loci
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