Hu Jinlong, Zhang Yu, Wang Ruizhi, Wang Xiaoyu, Feng Zhiming, Xiong Qiangqiang, Zhou Nianbing, Zhou Yong, Wei Haiyan, Zhang Hongcheng, Zhu Jinyan
{"title":"A genome-wide association study of panicle blast resistance to Magnaporthe oryzae in rice","authors":"Hu Jinlong, Zhang Yu, Wang Ruizhi, Wang Xiaoyu, Feng Zhiming, Xiong Qiangqiang, Zhou Nianbing, Zhou Yong, Wei Haiyan, Zhang Hongcheng, Zhu Jinyan","doi":"10.1007/s11032-024-01486-5","DOIUrl":"https://doi.org/10.1007/s11032-024-01486-5","url":null,"abstract":"<p>Rice blast, caused by <i>Magnaporthe oryzae</i> (<i>M. oryzae</i>), is one of the most serious diseases worldwide. Developing blast-resistant rice varieties is an effective strategy to control the spread of rice blast and reduce the reliance on chemical pesticides. In this study, 477 sequenced rice germplasms from 48 countries were inoculated and assessed at the booting stage. We found that 23 germplasms exhibited high panicle blast resistance against <i>M. oryzae.</i> Genome-wide association analysis (GWAS) identified 43 quantitative trait loci (QTLs) significantly associated (<i>P</i> < 1.0 × 10<sup>−4</sup>) with resistance to rice panicle blast. These QTL intervals encompass four genes (<i>OsAKT1</i>, <i>OsRACK1A</i>, <i>Bsr-k1</i> and <i>Pi25</i>/<i>Pid3</i>) previously reported to contribute to rice blast resistance. We selected QTLs with -Log10 (<i>P</i>-value) greater than 6.0 or those detected in two-year replicates, amounting to 12 QTLs, for further candidate gene analysis. Three blast resistance candidate genes (<i>Os06g0316800</i>, <i>Os06g0320000</i>, <i>Pi25</i>/<i>Pid3</i>) were identified based on significant single nucleotide polymorphisms (SNP) distributions within annotated gene sequences across these 12 QTLs and the differential expression levels among blast-resistant varieties after 72 h of inoculation. <i>Os06g0316800</i> encodes a glycine-rich protein, <i>OsGrp6</i>, an important component of plant cell walls involved in cellular stress responses and signaling. <i>Os06g0320000</i> encodes a protein with unknown function (DUF953), part of the thioredoxin-like family, which is crucial for maintaining reactive oxygen species (ROS) homeostasis in vivo, named as <i>OsTrxl1</i>. Lastly, <i>Pi25</i>/<i>Pid3</i> encodes a disease resistance protein, underscoring its potential importance in plant biology. By analyzing the haplotypes of these three genes, we identified favorable haplotypes for blast resistance, providing valuable genetic resources for future rice blast resistance breeding programs.</p>","PeriodicalId":18769,"journal":{"name":"Molecular Breeding","volume":"25 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141585453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Molecular BreedingPub Date : 2024-06-25eCollection Date: 2024-07-01DOI: 10.1007/s11032-024-01484-7
Yundong Yuan, Bo Lyu, Juan Qi, Xin Liu, Yuanzhi Wang, Pierre Delaplace, Yanfang Du
{"title":"A novel regulator of wheat tillering <i>LT1</i> identified by using an upgraded BSA method, uni-BSA.","authors":"Yundong Yuan, Bo Lyu, Juan Qi, Xin Liu, Yuanzhi Wang, Pierre Delaplace, Yanfang Du","doi":"10.1007/s11032-024-01484-7","DOIUrl":"10.1007/s11032-024-01484-7","url":null,"abstract":"<p><p>Branching/tillering is a critical process for plant architecture and grain yield. However, Branching is intricately controlled by both endogenous and environmental factors. The underlying mechanisms of tillering in wheat remain poorly understood. In this study, we identified <i>Less Tiller 1</i> (<i>LT1</i>) as a novel regulator of wheat tillering using an enhanced bulked segregant analysis (BSA) method, uni-BSA. This method effectively reduces alignment noise caused by the high repetitive sequence content in the wheat genome. Loss-of-function of <i>LT1</i> results in fewer tillers due to defects in axillary meristem initiation and bud outgrowth. We mapped <i>LT1</i> to a 6 Mb region on the chromosome 2D short arm and validated a nucleotide-binding (NB) domain encoding gene as <i>LT1</i> using CRISPR/Cas9. Furthermore, the lower sucrose concentration in the shoot bases of <i>lt1</i> might result in inadequate bud outgrowth due to disturbances in the sucrose biosynthesis pathways. Co-expression analysis suggests that <i>LT1</i> controls tillering by regulating <i>TaROX/TaLAX1</i>, the ortholog of the <i>Arabidopsis</i> tiller regulator <i>REGULATOR OF AXILLARY MERISTEM FORMATION</i> (<i>ROX</i>) or the rice axillary meristem regulator <i>LAX PANICLE1</i> (<i>LAX1</i>). This study not only offers a novel genetic resource for cultivating optimal plant architecture but also underscores the importance of our innovative BSA method. This uni-BSA method enables the swift and precise identification of pivotal genes associated with significant agronomic traits, thereby hastening gene cloning and crop breeding processes in wheat.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s11032-024-01484-7.</p>","PeriodicalId":18769,"journal":{"name":"Molecular Breeding","volume":"44 7","pages":"47"},"PeriodicalIF":2.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11199477/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141469555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Assessing genetic, racial, and geographic diversity among Ethiopian sorghum landraces and implications for heterotic potential for hybrid sorghum breeding.","authors":"Gezahegn Girma, Alemu Tirfessa, Tamirat Bejiga, Amare Seyoum, Moges Mekonen, Amare Nega, Adane Gebreyohannes, Getachew Ayana, Habte Nida, Tesfaye Mengiste, Gebisa Ejeta, Tesfaye Tesso","doi":"10.1007/s11032-024-01483-8","DOIUrl":"10.1007/s11032-024-01483-8","url":null,"abstract":"<p><p>The wealth of sorghum genetic resources in Africa has not been fully exploited for cultivar development in the continent. Hybrid cultivars developed from locally evolved germplasm are more likely to possess a well-integrated assembly of genes for local adaptation, productivity, quality, as well as for defensive traits and broader stability. A subset of 560 sorghum accessions of known fertility reaction representing the major botanical races and agro-ecologies of Ethiopia were characterized for genetic, agronomic and utilization parameters to lay a foundation for cultivar improvement and parental selection for hybrid breeding. Accessions were genotyped using a genotyping by sequencing (GBS) generating 73,643 SNPs for genetic analysis. Significant genetic variability was observed among accessions with Admixture and Discriminant Analysis of Principal Components where 67% of the accessions fell into K=10 clusters with membership coefficient set to > 0.6. The pattern of aggregation of the accessions partially overlapped with racial category and agro-ecological adaptation. Majority of the non-restorer (B-line) accessions primarily of the bicolor race from the wet highland ecology clustered together away from two clusters of fertility restorer (R-line) accessions. Small members of the B accessions were grouped with the R clusters and in vice-versa while significant numbers of both B and R accessions were spread between the major clusters. Such pattern of diversity along with the complementary agronomic data based information indicate the potential for heterosis providing the foundation for initiating hybrid breeding program based on locally adapted germplasm.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s11032-024-01483-8.</p>","PeriodicalId":18769,"journal":{"name":"Molecular Breeding","volume":"44 7","pages":"46"},"PeriodicalIF":2.6,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11190104/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141443025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Molecular BreedingPub Date : 2024-06-20eCollection Date: 2024-07-01DOI: 10.1007/s11032-024-01485-6
Yangdong Ye, Yanan Wang, Ling Zou, Xiaoqing Wu, Fangming Zhang, Cheng Chen, Shangye Xiong, Baohui Liang, Zhihong Zhu, Weiren Wu, Shuai Zhang, Jianguo Wu, Jie Hu
{"title":"Identification and candidate analysis of a new brown planthopper resistance locus in an Indian landrace of rice, paedai kalibungga.","authors":"Yangdong Ye, Yanan Wang, Ling Zou, Xiaoqing Wu, Fangming Zhang, Cheng Chen, Shangye Xiong, Baohui Liang, Zhihong Zhu, Weiren Wu, Shuai Zhang, Jianguo Wu, Jie Hu","doi":"10.1007/s11032-024-01485-6","DOIUrl":"10.1007/s11032-024-01485-6","url":null,"abstract":"<p><p>The brown planthopper (<i>Nilaparvata lugens</i> Stål, BPH) is the most destructive pest of rice (<i>Oryza sativa</i> L.). Utilizing resistant rice cultivars that harbor resistance gene/s is an effective strategy for integrated pest management. Due to the co-evolution of BPH and rice, a single resistance gene may fail because of changes in the virulent BPH population. Thus, it is urgent to explore and map novel BPH resistance genes in rice germplasm. Previously, an <i>indica</i> landrace from India, Paedai kalibungga (PK), demonstrated high resistance to BPH in both in Wuhan and Fuzhou, China. To map BPH resistance genes from PK, a BC<sub>1</sub>F<sub>2:3</sub> population derived from crosses of PK and a susceptible parent, Zhenshan 97 (ZS97), was developed and evaluated for BPH resistance. A novel BPH resistance locus, <i>BPH39</i>, was mapped on the short arm of rice chromosome 6 using next-generation sequencing-based bulked segregant analysis (BSA-seq). <i>BPH39</i> was validated using flanking markers within the locus. Furthermore, near-isogenic lines carrying <i>BPH39</i> (NIL-BPH39) were developed in the ZS97 background. NIL-BPH39 exhibited the physiological mechanisms of antibiosis and preference toward BPH. <i>BPH39</i> was finally delimited to an interval of 84 Kb ranging from 1.07 to 1.15 Mb. Six candidate genes were identified in this region. Two of them (<i>LOC_Os06g02930</i> and <i>LOC_Os06g03030</i>) encode proteins with a similar short consensus repeat (SCR) domain, which displayed many variations leading to amino acid substitutions and showed higher expression levels in NIL-BPH39. Thus, these two genes are considered reliable candidate genes for <i>BPH3</i>9. Additionally, transcriptome sequencing, DEGs analysis, and gene RT-qPCR verification preliminary revealed that <i>BPH39</i> may be involved in the jasmonic acid (JA) signaling pathway, thus mediating the molecular mechanism of BPH resistance. This work will facilitate map-based cloning and marker-assisted selection for the locus in breeding programs targeting BPH resistance.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s11032-024-01485-6.</p>","PeriodicalId":18769,"journal":{"name":"Molecular Breeding","volume":"44 7","pages":"45"},"PeriodicalIF":2.6,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11190133/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141443026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Molecular BreedingPub Date : 2024-06-10eCollection Date: 2024-06-01DOI: 10.1007/s11032-024-01482-9
Zhenghua He, Jie Zhang, Haitao Jia, Shilong Zhang, Xiaopeng Sun, Elsayed Nishawy, Hui Zhang, Mingqiu Dai
{"title":"Correction to: Genome‑wide identification and analyses of <i>ZmAPY</i> genes reveal their roles involved in maize development and abiotic stress responses.","authors":"Zhenghua He, Jie Zhang, Haitao Jia, Shilong Zhang, Xiaopeng Sun, Elsayed Nishawy, Hui Zhang, Mingqiu Dai","doi":"10.1007/s11032-024-01482-9","DOIUrl":"10.1007/s11032-024-01482-9","url":null,"abstract":"<p><p>[This corrects the article DOI: 10.1007/s11032-024-01474-9.].</p>","PeriodicalId":18769,"journal":{"name":"Molecular Breeding","volume":"44 6","pages":"44"},"PeriodicalIF":2.6,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11164836/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141311088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Molecular BreedingPub Date : 2024-06-02eCollection Date: 2024-06-01DOI: 10.1007/s11032-024-01475-8
Tong-Ju Eh, Pei Lei, Jong-Min Phyon, Hyon-Il Kim, Yue Xiao, Le Ma, Jianxin Li, Yujing Bai, Ximei Ji, Guangze Jin, Fanjuan Meng
{"title":"The <i>AaERF64</i>-<i>AaTPPA</i> module participates in cold acclimatization of <i>Actinidia arguta</i> (Sieb. et Zucc.) Planch ex Miq.","authors":"Tong-Ju Eh, Pei Lei, Jong-Min Phyon, Hyon-Il Kim, Yue Xiao, Le Ma, Jianxin Li, Yujing Bai, Ximei Ji, Guangze Jin, Fanjuan Meng","doi":"10.1007/s11032-024-01475-8","DOIUrl":"10.1007/s11032-024-01475-8","url":null,"abstract":"<p><p><i>Actinidia arguta</i> (<i>A. arguta</i>, kiwiberry) is a perennial deciduous vine with a strong overwintering ability. We hypothesized that trehalose metabolism, which plays a pivotal role in the stress tolerance of plants, may be involved in the cold acclimatization of <i>A. arguta</i>. Transcriptome analysis showed that the expression of <i>AaTPPA</i>, which encodes a trehalose-6-phosphate phosphatase (TPP), was upregulated in response to low temperatures. <i>AaTPPA</i> expression levels were much higher in lateral buds, roots, and stem cambia than in leaves in autumn. In <i>AaTPPA</i>-overexpressing (OE) <i>Arabidopsis thaliana</i> (<i>A. thaliana</i>), trehalose levels were 8-11 times higher than that of the wild type (WT) and showed different phenotypic characteristics from WT and <i>OtsB</i> (<i>Escherichia coli TPP</i>) overexpressing lines. <i>AaTPPA</i>-OE <i>A. thaliana</i> exhibited significantly higher freezing tolerance than WT and <i>OtsB</i>-OE lines. Transient overexpression of <i>AaTPPA</i> in <i>A. arguta</i> leaves increased the scavenging ability of reactive oxygen species (ROS) and the soluble sugar and proline contents. <i>AaERF64</i>, an ethylene-responsive transcription factor, was induced by ethylene treatment and bound to the GCC-box of the <i>AaTPPA</i> promoter to activate its expression. <i>AaTPPA</i> expression was also induced by abscisic acid. In summary, the temperature decrease in autumn is likely to induce <i>AaERF64</i> expression through an ethylene-dependent pathway, which consequently upregulates <i>AaTPPA</i> expression, leading to the accumulation of osmotic protectants such as soluble sugars and proline in the overwintering tissues of <i>A. arguta</i>.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s11032-024-01475-8.</p>","PeriodicalId":18769,"journal":{"name":"Molecular Breeding","volume":"44 6","pages":"43"},"PeriodicalIF":2.6,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11144688/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141247768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Utilization of marker-assisted backcrossing to generate new gynoecious cucumber lines with genetic heritage similar to the indigenous Vietnamese cucumber","authors":"Linh T. T. Le, Kinh L. Le","doi":"10.1007/s11032-024-01481-w","DOIUrl":"https://doi.org/10.1007/s11032-024-01481-w","url":null,"abstract":"<p>The marker-assisted backcrossing (MAB) can help to transfer an interested allele at a target locus from a donor to a recipient line. Gynoecious is a pivotal trait of cucumber since commercial F<sub>1</sub> hybrid seeds produced with gynoecious line as one of the parents are high-yield and affordable. This study aims to transfer the <i>F</i> locus encoded for gynoecious trait to Vietnamese domesticated cucumbers by marker-assisted backcrossing. Two monoecious cucumber lines, A<sub>1</sub> (Ha Giang, Vietnam) A<sub>2</sub> (Yen Bai, Vietnam), and two gynoecious cucumber lines, B<sub>1</sub> (Plantgene, India) and B<sub>2</sub> (Hue, Vietnam) were utilized as the starting materials. <i>BCAT</i> marker (located on the <i>F</i> locus) and 52 SSRs (spread across seven chromosomes and tightly linked with some crucial horticultural traits) were used as the foreground and background markers, respectively. With this, phenotype selection for fruit and leaf sizes was also applied. First, using phenotypic screening and foreground marker, A<sub>1</sub> (Ha Giang, Vietnam) and B<sub>1</sub> (Plantgene, India) were selected as donor and recurrent parents for backcrossing. Then, after two backcrosses followed by two self-pollinations, four gynoecious C cucumber lines were created. These C lines have leaf sizes slightly bigger than the recurrent parent. Importantly, their fruit length is the same or longer than A<sub>1</sub> (Ha Giang, Vietnam). These new gynoecious lines could be used as material lines for producing commercial F<sub>1</sub> hybrid seeds.</p>","PeriodicalId":18769,"journal":{"name":"Molecular Breeding","volume":"27 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141166202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Identification of the causal mutation in early heading mutant of bread wheat (<i>Triticum aestivum</i> L.) using MutMap approach.","authors":"Shoya Komura, Kentaro Yoshida, Hironobu Jinno, Youko Oono, Hirokazu Handa, Shigeo Takumi, Fuminori Kobayashi","doi":"10.1007/s11032-024-01478-5","DOIUrl":"10.1007/s11032-024-01478-5","url":null,"abstract":"<p><p>In bread wheat (<i>Triticum aestivum</i> L.), fine-tuning the heading time is essential to maximize grain yield. <i>Photoperiod-1</i> (<i>Ppd-1</i>) and <i>VERNALIZATION 1</i> (<i>Vrn-1</i>) are major genes affecting photoperiod sensitivity and vernalization requirements, respectively. These genes have predominantly governed heading timing. However, <i>Ppd-1</i> and <i>Vrn-1</i> significantly impact heading dates, necessitating another gene that can slightly modify heading dates for fine-tuning. In this study, we developed an early heading mutant from the ethyl methanesulfonate-mutagenized population of the Japanese winter wheat cultivar \"Kitahonami.\" MutMap analysis identified a nonsense mutation in the clock component gene <i>Wheat PHYTOCLOCK 1/LUX ARRHYTHMO</i> (<i>WPCL-D1</i>) as the probable SNP responsible for the early heading mutant on chromosome 3D. Segregation analysis using F<sub>2</sub> and F<sub>3</sub> populations confirmed that plants carrying the <i>wpcl-D1</i> allele headed significantly earlier than those with the functional <i>WPCL-D1</i>. The early heading mutant exhibited increased expression levels of <i>Ppd-1</i> and circadian clock genes, such as <i>WPCL1</i> and <i>LATE ELONGATED HYPOCOTYL</i> (<i>LHY</i>). Notably, the transcript accumulation levels of <i>Ppd-A1</i> and <i>Ppd-D1</i> were influenced by the copy number of the functional <i>WPCL1</i> gene. These results suggest that a loss-of-function mutation in <i>WPCL-D1</i> is the causal mutation for the early heading phenotype. Adjusting the functional copy number of <i>WPCL1</i> will be beneficial in fine-tuning of heading dates.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s11032-024-01478-5.</p>","PeriodicalId":18769,"journal":{"name":"Molecular Breeding","volume":"44 6","pages":"41"},"PeriodicalIF":2.6,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11106051/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141083092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xingru Xiang, Ping Qiu, Zhichao Mei, Min Yao, Wei Liu, Dan He, Song Cao, Xin He, Xinghua Xiong, Zhongsong Liu, Lunwen Qian
{"title":"Genome-wide association study and transcriptome analysis reveal natural variation of key genes regulation flowering time in rapeseed","authors":"Xingru Xiang, Ping Qiu, Zhichao Mei, Min Yao, Wei Liu, Dan He, Song Cao, Xin He, Xinghua Xiong, Zhongsong Liu, Lunwen Qian","doi":"10.1007/s11032-024-01479-4","DOIUrl":"https://doi.org/10.1007/s11032-024-01479-4","url":null,"abstract":"<p>Flowering time is a crucial determinant of both the yield and oil quality of rapeseed as well as a key indicator of plant maturity. We performed a genome-wide association study and transcriptome analysis to identify key genes/loci regulating flowering time in <i>Brassica napus</i> L. Forty-six haplotype regions harboring candidate genes were determined to be significantly associated with flowering time, and 28 of these haplotype regions overlapped with previously reported quantitative trait loci. A further investigation of these haplotype regions revealed nucleotide variations in the genes <i>BnaFT</i>-A02, <i>BnaFRI</i>-A10, and <i>BnaFPA</i>-A09 that correlated with phenotypic variations in flowering time. Furthermore, the co-expression network analysis indicated that <i>BnaFT</i>-A02 is directly linked to <i>BnaFRI</i>-A10 and <i>BnaFPA</i>-A09, in a subnetwork and also associated with 13 vernalization, 31 photoperiod, 33 autonomous pathway, and 10 gibberellin pathway genes, forming a potential network regulating flowering time in rapeseed. These results provide valuable haplotype markers for the breeding of early maturing rapeseed varieties.</p>","PeriodicalId":18769,"journal":{"name":"Molecular Breeding","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141063981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}