Whole genome sequencing and bulked segregant analysis suggest a new mechanism of amitraz resistance in the citrus red mite, Panonychus citri (Acari: Tetranychidae)

2021 ◽  
Author(s):  
Shi‐Jiang Yu ◽  
Lin Cong ◽  
Qi Pan ◽  
Li‐Li Ding ◽  
Shuang Lei ◽  
...  
2020 ◽  
Vol 21 (6) ◽  
pp. 2162 ◽  
Author(s):  
Tingmin Liang ◽  
Wenchao Chi ◽  
Likun Huang ◽  
Mengyu Qu ◽  
Shubiao Zhang ◽  
...  

Basal or partial resistance has been considered race-non-specific and broad-spectrum. Therefore, the identification of genes or quantitative trait loci (QTLs) conferring basal resistance and germplasm containing them is of significance in breeding crops with durable resistance. In this study, we performed a bulked segregant analysis coupled with whole-genome sequencing (BSA-seq) to identify QTLs controlling basal resistance to blast disease in an F2 population derived from two rice varieties, 02428 and LiXinGeng (LXG), which differ significantly in basal resistance to rice blast. Four candidate QTLs, qBBR-4, qBBR-7, qBBR-8, and qBBR-11, were mapped on chromosomes 4, 7, 8, and 11, respectively. Allelic and genotypic association analyses identified a novel haplotype of the durable blast resistance gene pi21 carrying double deletions of 30 bp and 33 bp in 02428 (pi21-2428) as a candidate gene of qBBR-4. We further assessed haplotypes of Pi21 in 325 rice accessions, and identified 11 haplotypes among the accessions, of which eight were novel types. While the resistant pi21 gene was found only in japonica before, three Chinese indica varieties, ShuHui881, Yong4, and ZhengDa4Hao, were detected carrying the resistant pi21-2428 allele. The pi21-2428 allele and pi21-2428-containing rice germplasm, thus, provide valuable resources for breeding rice varieties, especially indica rice varieties, with durable resistance to blast disease. Our results also lay the foundation for further identification and functional characterization of the other three QTLs to better understand the molecular mechanisms underlying rice basal resistance to blast disease.


2016 ◽  
Vol 88 (3) ◽  
pp. 345-360 ◽  
Author(s):  
Heqiang Huo ◽  
Isabelle M. Henry ◽  
Eric R. Coppoolse ◽  
Miriam Verhoef-Post ◽  
Johan W. Schut ◽  
...  

2018 ◽  
Author(s):  
Harry Klein ◽  
Yuguo Xiao ◽  
Phillip A Conklin ◽  
Rajanikanth Govindarajulu ◽  
Jacob A Kelly ◽  
...  

Forward genetics remains a powerful method for revealing the genes underpinning organismal form and function, and for revealing how these genes are tied together in gene networks. In maize, forward genetics has been tremendously successful, but the size and complexity of the maize genome made identifying mutant genes an often arduous process with traditional methods. The next generation sequencing revolution has allowed for the gene cloning process to be significantly accelerated in many organisms, even when genomes are large and complex. Here, we describe a bulked-segregant analysis sequencing (BSA-Seq) protocol for cloning mutant genes in maize. Our simple strategy can be used to quickly identify a mapping interval and candidate single nucleotide polymorphisms (SNPs) from whole genome sequencing of pooled F2 individuals. We employed this strategy to identify narrow odd dwarf as an enhancer of teosinte branched1 , and to identify a new allele of defective kernel1 . Our method provides a quick, simple way to clone genes in maize.


2018 ◽  
Vol 8 (11) ◽  
pp. 3583-3592 ◽  
Author(s):  
Harry Klein ◽  
Yuguo Xiao ◽  
Phillip A. Conklin ◽  
Rajanikanth Govindarajulu ◽  
Jacob A. Kelly ◽  
...  

2018 ◽  
Author(s):  
Mark Stevenson ◽  
Alistair T Pagnamenta ◽  
Heather G Mack ◽  
Judith A Savige ◽  
Kate E Lines ◽  
...  

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 146-146
Author(s):  
D. M. Bickhart ◽  
L. Xu ◽  
J. L. Hutchison ◽  
J. B. Cole ◽  
D. J. Null ◽  
...  

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