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Identification of candidate genes for aphid resistance in upland cotton by QTL mapping and expression analysis

The Crop Journal 2023年第5期11卷 1600-1604页

作者： Qiushuang An Zhenyuan Pan Nurimanguli Aini Peng Han Yuanlong Wu Chunyuan You Xinhui Nie Key Laboratory of Oasis Ecology Agricultural of Xinjiang Production and Construction Corps Agricultural CollegeShihezi UniversityShihezi 832003XinjiangChina Cotton Research Institute of the Shihezi Academy of Agriculture Science Shihezi 832011XinjiangChina

Lignin is one of the main components of cell walls and is essential for resistance to insect pests in *** plants are damaged by aphid(Aphis gossypii) worldwide but resistant breeding is undeveloped due to scarce knowledge on resistance genes and the mechanism. This study reported a lignin biosynthesisrelated gene identified in the F_(2) population derived from the cross between cotton cultivars Xinluzao 61(resistant to aphid) and Xinluzao 50(susceptible to aphid). A quantitative trait locus was mapped on chromosome D04 with a logarithm of odds(LOD) score of 5.99 and phenotypic effect of 27%. RNA-seq analysis of candidate intervals showed that the expression level of GH_D04G1418 was higher in the resistant cultivar than in the susceptible cultivar. This locus is close to AtLAC4 in the phylogenetic tree and contains a conserved laccase domain. Hence, it was designated GhLAC4-3. Silencing of GhLAC4-3 in Xinluzao 61 via virus-induced gene silencing(VIGS) resulted in decreased lignin content and increased susceptibility to aphids. These results suggest that GhLAC4-3 might enhance aphid resistance by regulating lignin biosynthesis in cotton.

关键词： GhLAC4-3 Lignin Gossypium hirsutum aphid resistance

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resistance in Barley (<i>Hordeum vulgare</i>L.) to New Invasive aphid, Hedgehog Grain aphid (<i>Sipha maydis</i>, Passerini) (Hemiptera: aphididae)

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American Journal of Plant Sciences 2020年第6期11卷 869-879页

作者： D. W. Mornhinweg G. J. Puterka J. S. Armstrong Wheat Peanut and Other Field Crops Research Unit USDA-ARS Stillwater OK USA

Sipha maydis Passerini (Hemiptera: aphididae) is a pest of cereals in many regions of the world and was identified as an invasive pest of the US in 2007. Regional surveys from 2015-2017 revealed this pest was broadly... 详细信息

Sipha maydis Passerini (Hemiptera: Aphididae) is a pest of cereals in many regions of the world and was identified as an invasive pest of the US in 2007. Regional surveys from 2015-2017 revealed this pest was broadly distributed throughout many of the western Great Plains states where it is a potential threat to cereal production. The common name hedgehog grain aphid, HGA, has been associated with Sipha maydis in the US. Cross-resistance where a plant is resistant to one aphid species and is also resistant to another species that is known to occur. Six barleys were evaluated for cross-resistance to HGA: Russian wheat aphid, RWA, resistant germplasms STARS 9301B and STARS 9577B and cultivar “Mesa”;greenbug, GB, resistant germplasm STARS 1501B and cultivar “Post 90”;and RWA and GB resistant experimental line 00BX 11-115. Cultivars “Morex” and “Schuyler” were susceptible controls. Antixenosis was measured 5 days after infestation by HGA. Seedling damage ratings and reductions in seedling growth were recorded after 17 days of infestation. Intrinsic rate of increase, rm, of HGA was determined by following the development of newborn aphids to adulthood and reproduction. 00BX 11-115 and Post 90 had significantly greater antixenosis (fewer aphids/seedling), significantly lower plant damage ratings, and significantly lower intrinsic rates of increase than other entries. Differences in see

关键词： Greenbug resistance Russian Wheat aphid resistance aphid resistance Antixenosis Plant Damage Ratings Hedgehog Grain aphid

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Haplotype-resolved genome of a heterozygous wild peach reveals the PdaWRKY4-PdaCYP716A1 module mediates resistance to aphids by regulating betulin biosynthesis

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JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2024年第12期66卷 2716-2735页

作者： Wang, Jun-Xiu Li, Yong Wang, Xin-Wei Cao, Ke Chen, Chang-Wen Wu, Jin-Long Fang, Wei-Chao Zhu, Geng-Rui Chen, Xue-Jia Guo, Dan-Dan Wang, Jiao Zhao, Ya-Lin Fan, Jia-Qi Liu, Su-Ning Li, Wen-Qing Bie, Hang-Ling Xu, Qiang Wang, Li-Rong Chinese Acad Agr Sci Zhengzhou Fruit Res Inst Natl Key Lab Germplasm Innovat & Utilizat Hort Cro Zhengzhou 451100 Peoples R China Chinese Acad Agr Sci Western Res Inst Changji 831100 Peoples R China Huazhong Agr Univ Coll Hort & Forestry Sci Wuhan 430070 Peoples R China Southwest Univ Coll Hort & Landscape Architecture Key Lab Agr Biosafety & Green Prod Upper Yangtze R Minist Educ Chongqing 400715 Peoples R China Chinese Acad Agr Sci Zhengzhou Fruit Res Inst Natl Hort Germplasm Resources Ctr China NPGRC Zhengzhou 451100 Peoples R China

Wild species of domesticated crops provide valuable genetic resources for resistance breeding. Prunus davidiana, a wild relative of peach with high heterozygosity and diverse stress tolerance, exhibits high resistance against aphids. However, the highly heterozygous genome of P. davidiana makes determining the underlying factors influencing resistance traits challenging. Here, we present the 501.7 Mb haplotype-resolved genome assembly of P. davidiana. Genomic comparisons of the two haplotypes revealed 18,152 structural variations, 2,699 Pda_hap1-specific and 2,702 Pda_hap2-specific genes, and 1,118 allele-specific expressed genes. Genome composition indicated 4.1% of the P. davidiana genome was non-peach origin, out of which 94.5% was derived from almond. Based on the haplotype genome, the aphid resistance quantitative trait locus (QTL) was mapped at the end of Pda03. From the aphid resistance QTL, PdaWRKY4 was identified as the major dominant gene, with a 9-bp deletion in its promoter of the resistant phenotype. Specifically, PdaWRKY4 regulates aphid resistance by promoting PdaCYP716A1-mediated anti-aphid metabolite betulin biosynthesis. Moreover, we employed a genome design to develop a breeding workflow for rapidly and precisely producing aphid-resistant peaches. In conclusion, this study identifies a novel aphid resistance gene and provides insights into genome design for the development of resistant fruit cultivars.

关键词： allele-specific expression aphid resistance haplotype genome PdaWRKY4 peach

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