QTL Analysis of Rice Grain Size Using Segregating Populations Derived from the Large Grain Line

Lee, Ja-Hong; Seo, Jeonghwan; Lar, San Mar; Jang, Seong-Ho; Zhang, Hongjia; Lee, Ah-Rim; Cao, Fangyuan; Kim, Na‐Eun; Lee, Joohyun; Kwon, Soon-Wook

doi:10.3390/agriculture11060565

Cited by 4 publications

(2 citation statements)

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“…All studied genotypes displayed significant deviations across traits which specified a large array of variability among the traits. Similar deviations were also displayed in morphological traits [ 31 , 32 , 33 , 34 , 35 ], and other yield-contributing traits of different crops [ 20 , 36 , 37 ]. The selection of genotypes based on σ 2 p may be deceptive owing to environmental impacts.…”

Section: Discussionsupporting

confidence: 56%

Genetic Variability, Character Association, and Path Coefficient Analysis in Transplant Aman Rice Genotypes

Faysal

Ali

Azam

et al. 2022

Plants

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A field experiment was carried out with 20 genotypes of Transplant Aman (T. Aman) rice at the Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur-1706, Bangladesh. The study was performed to evaluate the genetic deviation, trait association, and path coefficient (PC) based on grain yield (GY) and different yield-contributing agronomic characters. Variance analysis displayed extensive traits-wise variations across accessions, indicating variability and the opportunity for genetic selection for desirable traits. The high mean, range, and genotypic variances observed for most of the characters indicated a wide range of variation for these traits. All the characters indicated the minimum influence of environment on the expression of the trait and genetic factors had a significant role in the expressivity of these characters. High heritability in broad sense (h2b) and high to moderate genetic advance in percent of the mean (GAPM) were recorded for all the characters except for panicle length (PL). Based on mean, range, and all genetic parameters, the selection of all the traits except for PL would contribute to the development of T. Aman rice genotypes. A correlation study revealed that selection based on plant height (PH), number of effective tillers per hill (NET), PL, number of filled spikelets per panicle (NFS), flag leaf length (FLL), spikelet sterility (SS) percentage, and harvest index (HI) would be effective for increasing the GY of rice. Genotypic correction with grain yield (GCGY), PC and principal component analysis (PCA) revealed that direct selection of NFS, HI, SS%, and FLL would be effective for improving the GY of rice in future breeding programs.

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Section: Discussionsupporting

confidence: 56%

Genetic Variability, Character Association, and Path Coefficient Analysis in Transplant Aman Rice Genotypes

Faysal

Ali

Azam

et al. 2022

Plants

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“…Numerous SNP markers obtained by high-throughput sequencing could be used for constructing high-density genetic maps and QTL mapping for important traits [18,25], and this approach has proven effective in many major crops [17,[26][27][28]. Recently, through further splicing and optimizing the TKS genome constructed in 2018 [2], a TKS genome sketch at the chromosome level was published in 2021, which provided a solid foundation for high-density SNP genetic map construction, QTL fine mapping and MAS for TKS breeding [1].…”

Section: Introductionmentioning

confidence: 99%

Construction of the first high-density SNP genetic map and identification of QTLs for the natural rubber content in Taraxacum kok-saghyz Rodin

et al. 2023

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Background Taraxacum kok-saghyz Rodin (TKS) is a promising commercial alternative natural rubber (NR) yielding plant. Cultivating TKS with a high NR content is an important breeding target, and developing molecular markers related to NR content can effectively accelerate the breeding process of TKS. Results To construct a high-density SNP genetic map and uncover genomic regions related to the NR content in TKS, an F1 mapping population of TKS was constructed by crossing two parents (l66 and X51) with significant differences in NR contents. The NR content of the F1 plants ranged from 0.30 to 15.14% and was distributed normally with a coefficient of variation of 47.61%, indicating quantitative trait inheritance. Then, employing whole-genome resequencing (WGR), a TKS genetic linkage map of 12,680 bin markers comprising 322,439 SNPs was generated. Based on the genetic map and NR content of the F1 population, six quantitative trait loci (QTLs) for NR content with LOD > 4.0 were identified on LG01/Chr01 and LG06/Chr06. Of them, the 2.17 Mb genomic region between qHRC-C6-1 and qHRC-C6-2 on ChrA06, with 65.62% PVE in total, was the major QTL region. In addition, the six QTLs have significant additive genetic effects on NR content and could be used to develop markers for marker-assisted selection (MAS) in TKS with a high NR content. Conclusion This work constructed the first high-density TKS genetic map and identified the QTLs and genomic regions controlling the NR content, which provides useful information for fine mapping, map-based cloning, and MAS in TKS.

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Construction of first high-density SNP genetic map and identification of QTL for the natural rubber content in Taraxacum kok-saghyz Rodin

Yang

Qin

Chen

et al. 2022

Preprint

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BackgroundTaraxacum kok-saghyz Rodin (TKS) is a promising commercial alternative NR yielding plant. Cultivating TKS with a high NR content is an important breeding target, and developing molecular markers related to the NR content can effectively accelerate the breeding process of TKS. ResultsTo construct a high-density SNP genetic map and uncover genomic regions related to the NR content in TKS, a F 1 mapping population of TKS was constructed by crossing two parents (X51×l66) with signi cant differences in NR contents. The NR content of the F 1 plants ranged from 0.30-15.14% and was distributed normally with a coe cient of variation of 47.61%, indicating quantitative trait inheritance. Then, employing the whole-genome resequencing (WGR), a TKS genetic linkage map of 12680 bin markers comprising 322,439 SNPs was generated. Based on the genetic map and NR content of the F 1 population, six quantitative trait loci (QTLs) for NR content with LOD > 4.0 were identi ed on LG01/Chr01 and LG06/Chr06. Of them, the 2.17 Mb genomic region between qHRC-C6-1 and qHRC-C6-2 on ChrA06, with 65.62% PVE in total, was the major QTL region. In addition, the six QTLs have signi cant additive genetic effects on NR content and could be used to develop markers for marker-assisted selection (MAS) in TKS with a high NR content. ConclusionsThis work constructed the rst high-density TKS genetic map, identi ed the QTLs and genomic regions controlling the NR content, which provides useful information for ne mapping, map-based cloning, and MAS in TKS.

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QTL Analysis of Rice Grain Size Using Segregating Populations Derived from the Large Grain Line

Cited by 4 publications

References 44 publications

Genetic Variability, Character Association, and Path Coefficient Analysis in Transplant Aman Rice Genotypes

Genetic Variability, Character Association, and Path Coefficient Analysis in Transplant Aman Rice Genotypes

Construction of the first high-density SNP genetic map and identification of QTLs for the natural rubber content in Taraxacum kok-saghyz Rodin

Construction of first high-density SNP genetic map and identification of QTL for the natural rubber content in Taraxacum kok-saghyz Rodin

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