Comparative genomic analyses reveal different genetic basis of two types of fruit in Maloideae
文献类型： 外文期刊
作者： Wang, Yi 1 ; Hu, Hongju 3 ; Jin, Juntong 1 ; Yuan, Hui 1 ; Zhang, Jingguo 3 ; Wang, Yuqing 1 ; Wang, Mingqian 1 ; Yin, Shaobo 1 ; Zhao, Jiaming 1 ; Lin, Shijiao 1 ; Liang, Yuling 1 ; Wang, Jiayao 1 ; Wei, Shipeng 1 ; Liu, Weiting 1 ; Li, Bin 4 ; Ji, Yinglin 1 ; Wang, Aide 1 ;
作者机构： 1.Shenyang Agr Univ, Coll Hort, Key Lab Fruit Postharvest Biol Liaoning Prov, Shenyang, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Plant Divers & Specialty Crops, Beijing Key Lab Grape Sci & Enol, Beijing, Peoples R China
3.Hubei Acad Agr Sci, Inst Fruit & Tea, Wuhan, Peoples R China
4.Shenyang Agr Univ, Coll Food, Key Lab Hlth Food Nutr & Innovat Mfg Liaoning Prov, Shenyang, Peoples R China
期刊名称：NATURE COMMUNICATIONS （ 影响因子：15.7； 五年影响因子：17.2 ）
ISSN：
年卷期： 2025 年 16 卷 1 期
页码：
收录情况： SCI
摘要： Fleshy fruits are classified as ethylene-dependent or ethylene-independent according to the ethylene climacteric at the onset of ripening. However, the mechanism forming these two types of fruits is unclear. Pears (Pyrus spp.) contain the both types, thus can serve as a model system to answer this question. Here, we assemble haplotype-resolved and chromosome-level genomes for ethylene-dependent and ethylene-independent accessions, and re-sequence 118 pear accessions. Two long noncoding RNAs named Ethylene Inhibiting Factor 1 (EIF1) and EIF2 are identified, which suppress the transcription of ethylene biosynthesis gene ACS1 and ethylene biosynthesis, generating ethylene-independent fruit. Comparative genomic analyses reveal that allele-specific structural variations result in the loss of EIF1 and/or EIF2, removing the suppression on ACS1 transcription and generating ethylene-dependent fruit. Further study reveals that, in most common fleshy fruits of Maloideae, EIF homologue exits in ethylene-independent pear and loquat and is transcribed; while in ethylene-dependent apple and hawthorn, EIF homologue does not exist in their genomes.
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