Conditional QTL mapping for plant height with respect to the length of the spike and internode in two mapping populations of wheat

Cui, Fa; Li, Jun; Ding, Anming; Zhao, Chunhua; Wang, Lin; Wang, Xiuqin; Li, Sishen; Bao, Yinguang; Li, Xingfeng; Feng, Deshun; Kong, Lingrang; Wang, Honggang

doi:10.1007/s00122-011-1551-6

Cited by 139 publications

(96 citation statements)

References 55 publications

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“…In addition, the fact that the loci responsible for SL and PH were detected by the same marker (barc24) on 6B (P < 0.01) suggested that PH and SL might be controlled by the same QTL or by several closely located QTLs. This result differs from previous study (Cui et al, 2011), in which a weak association was found between these two traits. Therefore, although some QTLs only affected PH, other QTLs appeared to have pleiotropic effects on PH and SL.…”

Section: Discussioncontrasting

confidence: 99%

“…Previous studies have also identified QTLs controlling SL on chromosomes 2A and 5A (Cui et al, 2011). However, to our knowledge, none of the loci conferring SL have previously been detected on 6B.…”

Section: Discussionmentioning

confidence: 52%

“…Previous studies (Cadalen et al, 1998;Cui et al, 2011;Griffiths et al, 2012) have also identified loci linked with plant height on 6BL. Although this locus only increased plant height by 4.7 cm on average, the fact that this region was found to be involved in controlling plant height in different genetic backgrounds indicated that this locus was closely related to plant height.…”

Section: Discussionmentioning

confidence: 97%

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Improving yield and quality traits of durum wheat by introgressing chromosome segments from hexaploid wheat

Zhang

Yan³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. Durum wheat (Triticum turgidum durum; 2n = 4x = 28; genome AABB) has long been an important food resource for human diets. The projected increase of the world's population to 9.1 billion by 2050 has highlighted the importance and urgency for improving the yield and quality performance of durum wheat. A backcrossed population, which was derived from the durum wheat variety 'Bellaroi' (recurrent parent) and the hexaploid genotype 'CSCR6' (donor parent), was used to investigate the feasibility of improving yield-and quality-related traits of durum wheat by introgressing chromosome fragments from hexaploid wheat. The population means for grain protein content, gluten content, spike length, and spikelet number were improved compared with those of the recurrent parent 'Bellaroi'. A small proportion of the backcross population lines showed significant improvements in spike length and spikelet number compared with the recurrent parent Improving yield and quality traits of durum wheat 'Bellaroi'. Some loci with significant effects for plant height, spike length, spikelet number, and thousand-grain weight were identified. Several of these loci affected more than one trait. These results showed that the introgression of chromosome fragments from 'CSCR6' into the durum genetic background could be an effective method for improving yield and quality traits of durum wheat. In addition, the loci showing significant effects on desired traits in this study could be fine mapped using an F 2 population obtained by backcrossing the lines that carry the positive allele(s) with the recurrent parent.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 52%

Section: Discussionmentioning

confidence: 97%

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Improving yield and quality traits of durum wheat by introgressing chromosome segments from hexaploid wheat

Zhang

Yan³

et al. 2013

Genet. Mol. Res.

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“…More recently, a method for multivariable conditional analysis was proposed for analyzing the contributions of individual component traits to a complex trait (Wen and Zhu, 2005). By combining the conditional genetic analysis method with QTL mapping (unconditional QTL analysis), the method was extended to map conditional QTL for the molecular dissection of complex traits (Guo et al, 2005;Zhao et al, 2006;Liu et al, 2008;Cui et al, 2011). Therefore, conditional QTL mapping analysis is an efficient tool for determining relationships between complex traits and their components.…”

Section: Qtl Analysis: Corroborations and New Findingsmentioning

confidence: 99%

“…This method could be used to determine genetic interrelationships between traits at the level of individual QTL, and to find additional QTL that are undetectable with unconditional mapping (Li et al, 2008). This method has been successfully used to analyze QTL by Guo et al (2005), Zhao et al (2006), Liu et al (2008), andCui et al (2011).…”

Section: Introductionmentioning

confidence: 99%

Genetic relationship between lodging and lodging components in barley (Hordeum vulgare) based on unconditional and conditional quantitative trait locus analyses

Chen¹,

Liu²,

Deng³

et al. 2014

Genet. Mol. Res.

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ABSTRACT. Lodging (LD) is a major constraint limiting the yield and forage quality of barley. Detailed analyses of LD component (LDC) traits were conducted using 246 F 2 plants generated from a cross between cultivars ZQ320 and 1277. Genetic relationships between LD and LDC were evaluated by unconditional and conditional quantitative trait locus (QTL) mapping with 117 simple sequence repeat markers. Ultimately, 53 unconditional QTL related to LD were identified on seven barley chromosomes. Up to 15 QTL accounted for over 10% of the phenotypic variation, and up to 20 QTL for culm strength were detected. Six QTL with pleiotropic effects showing significant negative correlations with LD were found between markers Bmag353 and GBM1482 on chromosome 4H. These alleles and alleles of QTL for wall thickness, culm strength, plant height, and plant weight originated from ZQ320. Conditional mapping identified 96 additional QTL for LD. Conditional QTL analysis demonstrated that plant height, plant height center of gravity, and length of the sixth internode had the greatest contribution to LD, whereas culm strength and length of the fourth internode, and culm strength of the second internode were the key factors for LD-resistant. Therefore, lodging resistance in barley can be improved based on selection of alleles affecting culm strength, wall thickness, plant height, and plant weight. The conditional QTL mapping method can be used to evaluate possible genetic relationships between LD and LDC while efficiently and precisely determining counteracting QTL, which will help in understanding the genetic basis of LD in barley.

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Mapping and validation of major and stable QTL for flag leaf size from tetraploid wheat

et al. 2022

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The flag leaf is an important photosynthetic organ of wheat (Triticum aestivum L.). Appropriate flag leaf size can effectively increase grain yield. In this study, a tetraploid wheat population of recombinant inbred lines (RILs) and a genetic map constructed based on a wheat 55K single‐nucleotide polymorphism (SNP) array were used to identify quantitative trait loci (QTL) for flag leaf length (FLL), flag leaf width (FLW), flag leaf area (FLA), and the flag leaf length/width ratio (FLR). A novel and major interval flanked by markers AX‐111633224 and AX‐109317229 was identified. This interval includes QTL for FLL (QFll.sau‐AM‐4B.2), for FLW (QFlw.sau‐AM‐4B.4), for FLA (QFla.sau‐AM‐4B), and for FLR (QFlr.sau‐AM‐4B). Based on the genotypes of the closely linked KASP (Kompetitive allele‐specific polymerase chain reaction [PCR]) marker (KASP‐AX‐108756198), QFlw.sau‐AM‐4B.4 and QFla.sau‐AM‐4B were successfully verified in two F3 populations with different genetic backgrounds. Genetic associations between flag leaf‐related traits and other agronomic traits were detected and analyzed. Four genes in this interval were likely involved in the growth and development of the flag leaf size. In conclusion, this study provides clues for excavating genes related to flag leaf size and breeding variety with ideal plant structure.

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Conditional QTL mapping for plant height with respect to the length of the spike and internode in two mapping populations of wheat

Cited by 139 publications

References 55 publications

Improving yield and quality traits of durum wheat by introgressing chromosome segments from hexaploid wheat

Improving yield and quality traits of durum wheat by introgressing chromosome segments from hexaploid wheat

Genetic relationship between lodging and lodging components in barley (Hordeum vulgare) based on unconditional and conditional quantitative trait locus analyses

Mapping and validation of major and stable QTL for flag leaf size from tetraploid wheat

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