Molecular characteristics of S-RNase alleles as the determ inant of self-i ncompatibility in the style of Fragaria viridi  被引量:2

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作  者:Jianke Du Chunfeng Ge Tingting Li Sanhong Wang Zhihong Gao Hidenori Sassa Yushan Qiao 

机构地区:[1]Laboratory of Fruit Crop Biotechnology,College of Horticulture,Nanjing Agricultural University,Nanjing 210095 Jiangsu,China [2]Laboratory of Genetics and Plant Breeding,Graduate School of Horticulture,Chiba University,Matsudo 271-8510 Chiba,Japan [3]Present address:Institute of Botany,Jiangsu Province and Chinese Academy of Sciences,Nanjing 210014 Jiangsu,China

出  处:《Horticulture Research》2021年第1期2456-2473,共18页园艺研究(英文)

基  金:This work was supported by the National Natural Science Foundation of Chi na(Gr ant no.32072540,31872056);the Fun dame ntal Research Fun ds for the Central Universities(Grant no.KYZZ2021002);a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).

摘  要:Strawberry(Fragaria spp.)is a member of the Rosoideae subfamily in the family Rosaceae.The self-incompatibility(SI)of some diploid species is a key agronomic trait that acts as a basic pollination barrier;however,the genetic mechanism underlying SI control in strawberry remains unclear.Two candidate S-RNases(S a-and S^-RNase)identi fi ed in the transcriptome of the styles of the self-incompatible Fragaria viridis 42 were con fi rmed to be SI determinants at the S locus following genotype identi fi cation and intraspeci fi c hybridization using sel fi ng progenies.Whole-genome collinearity and RNase T2 family analysis revealed that only an S locus exists in Fragaria;however,none of the compatible species contained S-RNase.Although the results of interspeci fi c hybridization experiments showed that F.viridis(SI)styles could accept pollen from F.mandshurica(self-compatible),the reciprocal cross was incompatible.S a and S b-RNase contain large introns,and their noncoding sequences(promotors and introns)can be transcribed into long noncoding RNAs(lncRNAs).Overall,the genus Fragaria exhibits S-RNase-based gametophytic SI,and S-RNase loss occurs at the S locus of compatible germplasms.In addition,a type of SI-independent unilateral incompatibility exists between compatible and incompatible Fragaria species.Furthermore,the large introns and neighboring lncRNAs in S-RNase in Fragaria could offer clues about S-RNase expression strategies.

关 键 词:FRAGARIA SPP alleles 

分 类 号:S668.4[农业科学—果树学]

 

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