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Kim, Joonyup,Yang, Ronghui,Chang, Caren,Park, Younghoon,Tucker, Mark L Oxford University Press 2018 Journal of experimental botany Vol.69 No.12
<▼1><P>A root-knot nematode gene (<I>MiIDL1</I>) produces a peptide that mimics the Arabidopsis IDA signaling peptide that regulates cell separation events including abscission and lateral root emergence.</P></▼1><▼2><P><B>Abstract</B></P><P>INFLORESCENCE DEFICIENT IN ABSCISSION (IDA) is a signaling peptide that regulates cell separation in Arabidopsis including floral organ abscission and lateral root emergence. IDA is highly conserved in dicotyledonous flowering plant genomes. <I>IDA-like</I> sequences were also found in the genomic sequences of root-knot nematodes, <I>Meloidogyne</I> spp., which are globally deleterious pathogens of agriculturally important plants, but the role of these genes is unknown. Exogenous treatment of the Arabidopsis <I>ida</I> mutant with synthetic peptide identical to the <I>M. incognita</I> IDA-like 1 (MiIDL1) protein sequence minus its N-terminal signal peptide recovered both the abscission and root architecture defects. Constitutive expression of the full-length <I>MiIDL1</I> open reading frame in the <I>ida</I> mutant substantially recovered the delayed floral organ abscission phenotype whereas transformants expressing a construct missing the MiIDL1 signal peptide retained the delayed abscission phenotype. Importantly, wild-type Arabidopsis plants harboring an <I>MiIDL1</I>-RNAi construct and infected with nematodes had approximately 40% fewer galls per root than control plants. Thus, the <I>MiIDL1</I> gene produces a functional IDA mimic that appears to play a role in successful gall development on Arabidopsis roots.</P></▼2>
Wu, Jinhua,Liu, Ronghui,Li, Hua,Yu, Hui,Yang, Yalan Asian Australasian Association of Animal Productio 2021 Animal Bioscience Vol.34 No.11
Objective: The swine leukocyte antigen (SLA) gene group, which is closely linked and highly polymorphic, has important biomedical significance in the protection and utilization of germplasm resources. However, genetic polymorphism analyses of SLA microsatellite markers in Chinese miniature pigs are limited. Methods: Eighteen pairs of microsatellite primers were used to amplify the SLA regions of seven miniature pig breeds and three wild boar breeds (n = 346) from different regions of China. The indexes of genetic polymorphism, including expected heterozygosity (He), polymorphic information content (PIC), and haplotype, were analyzed. The genetic differentiation coefficient (Fst) and neighbor-joining methods were used for cluster analysis of the breeds. Results: In miniature pigs, the SLA I region had the highest numbers of polymorphisms, followed by the SLA II and SLA III regions; the region near the centromere had the lowest number of polymorphisms. Among the seven miniature pig breeds, Diannan small-ear pigs had the highest genetic diversity (PIC value = 0.6396), whereas the genetic diversity of the Hebao pig was the lowest (PIC value = 0.4330). The Fst values in the Mingguang small-ear, Diannan small-ear, and Yunnan wild boars were less than 0.05. According to phylogenetic cluster analysis, the South-China-type miniature pigs clustered into one group, among which Mingguang small-ear pigs clustered with Diannan small-ear pigs. Haplotype analysis revealed that the SLA I, II, and III regions could be constructed into 13, 7, and 11 common haplotypes, respectively. Conclusion: This study validates the high genetic diversity of the Chinese miniature pig. Mingguang small-ear pigs have close kinship with Diannan small-ear pigs, implying that they may have similar genetic backgrounds and originate from the same population. This study also provides a foundation for genetic breeding, genetic resource protection, and classification of Chinese miniature pigs.