首页|A telomere-to-telomere gap-free reference genome assembly of avocado provides useful resources for identifying genes related to fatty acid biosynthesis and disease resistance

A telomere-to-telomere gap-free reference genome assembly of avocado provides useful resources for identifying genes related to fatty acid biosynthesis and disease resistance

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Avocado(Persea americana Mill.)is an economically valuable plant because of the high fatty acid content and unique flavor of its fruits.Its fatty acid content,especially the relatively high unsaturated fatty acid content,provides significant health benefits.We herein present a telomere-to-telomere gapless genome assembly(841.6 Mb)of West Indian avocado.The genome contains 40629 predicted protei-coding genes.Repeat sequences account for 57.9％of the genome.Notably,all telomeres,centromeres,and a nucleolar organizing region are included in this genome.Fragments from these three regions were observed via fluorescence in situ hybridization.We identified 376 potential disease resistance-related nucleotide-binding leucine-rich repeat genes.These genes,which are typically clustered on chromosomes,may be derived from gene duplication events.Five NLR genes(Pa11g0262,Pa02g4855,Pa07g3139,Pa07g0383,and Pa02g3196)were highly expressed in leaves,stems,and fruits,indicating they may be involved in avocado disease responses in multiple tissues.We also identified 128 genes associated with fatty acid biosynthesis and analyzed their expression patterns in leaves,stems,and fruits.Pa02g0113,which encodes one of 11 stearoyl-acyl carrier protein desaturases mediating C18 unsaturated fatty acid synthesis,was more highly expressed in the leaves than in the stems and fruits.These findings provide valuable insights that enhance our understanding of fatty acid biosynthesis in avocado.

Tianyu Yang、Yifan Cai、Tianping Huang、Danni Yang、Xingyu Yang、Xin Yin、Chengjun Zhang、Yunqiang Yang、Yongping Yang

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CAS Key Laboratory of Tropical Plant Resources and Sustainable Use,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Kunming,Yunnan 650223,China

Germplasm Bank of Wild Species,Yunnan Key Laboratory of Crop Wild Relatives Omics,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,Yunnan 650201,China

School of Life Sciences,Yunnan University,Kunming,Yunnan 650091,China

Kunming College of Life Science,University of Chinese Academy of Sciences,Beijing 100049,China

Center of Gardening&Horticulture,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Menglun,Mengla,Yunnan 666303,China

Institute of Tibetan Plateau Research at Kunming,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,Yunnan 650201,China

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2024

10.1093/hr/uhae119

园艺研究(英文)

园艺研究(英文)

CSTPCD
ISSN：
年,卷(期)：2024.11(7)