Comparative Mapping Suggests Repeated Selection of the Same Quantitative Trait Locus for High Leaf Photosynthesis Rate in Rice High-Yield Breeding Programs

Crop Science ◽  
2012 ◽  
Vol 52 (6) ◽  
pp. 2649-2658 ◽  
Author(s):  
Toshiyuki Takai ◽  
Yumiko Arai-Sanoh ◽  
Norio Iwasawa ◽  
Takeshi Hayashi ◽  
Satoshi Yoshinaga ◽  
...  
Keyword(s):  
Quantitative Trait Locus ◽  
Quantitative Trait ◽  
Comparative Mapping ◽  
Photosynthesis Rate ◽  
High Yield ◽  
Leaf Photosynthesis ◽  
Breeding Programs ◽  
Trait Locus ◽  
Selection Of

scholarly journals A Quantitative Trait Locus for Chlorophyll Content and its Association with Leaf Photosynthesis in Rice

Rice ◽  
2010 ◽  
Vol 3 (2-3) ◽  
pp. 172-180 ◽  
Author(s):  
Toshiyuki Takai ◽  
Motohiko Kondo ◽  
Masahiro Yano ◽  
Toshio Yamamoto
Keyword(s):  
Quantitative Trait Locus ◽  
Chlorophyll Content ◽  
Quantitative Trait ◽  
Leaf Photosynthesis ◽  
Trait Locus

scholarly journals Molecular Mapping of the Major Resistance Quantitative Trait Locus qHS2.09 with Simple Sequence Repeat and Single Nucleotide Polymorphism Markers in Maize

2012 ◽  
Vol 102 (7) ◽  
pp. 692-699 ◽  
Author(s):  
Jianfeng Weng ◽  
Xianjun Liu ◽  
Zhenhua Wang ◽  
Jianjun Wang ◽  
Lin Zhang ◽  
...  
Keyword(s):  
Quantitative Trait Locus ◽  
Single Nucleotide Polymorphism ◽  
Quantitative Trait ◽  
Nucleotide Polymorphism ◽  
Head Smut ◽  
Maize Breeding ◽  
Single Nucleotide ◽  
Breeding Programs ◽  
Trait Locus ◽  
Major Qtl

The major quantitative trait locus (QTL) qHS2.09 plays an important role in resistance to head smut during maize breeding and production. In this study, a near-isogenic line (NIL), L34, which harbors the major QTL qHS2.09 in bin 2.09, was developed using a resistant donor ‘Mo17’ in a susceptible genetic background ‘Huangzao4’. Using 18,683 genome-wide polymorphic loci, this major QTL was finely mapped into an interval of ≈1.10 Mb, flanked by single nucleotide polymorphism (SNP) markers PZE-102187307 and PZE-102188421. Moreover, the favorable allele from ‘Mo17’ for SNP PZE-102187611 in this interval that was most significantly associated with resistance to head smut (P = 1.88 E-10) and accounted for 39.7 to 44.4% of the phenotypic variance in an association panel consisting of 80 inbred lines. With combined linkage and association mapping, this major QTL was finally located between SNP PZE-102187486 and PZE-102188421 with an interval of ≈1.00 Mb. Based on the pedigrees of ‘Mo17’ and its derivatives widely used in temperate maize breeding programs, the favorable haplotype from ‘Mo17’ is shown to be the main source of resistance to head smut in these lines. Therefore, the SNPs closely linked to the major QTL qHS2.09, detected in both linkage and association mapping, and could be useful for marker-assisted selection in maize breeding programs.

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