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High-density mapping suggests cytoplasmic male sterility with two restorer genes in almond×peach progenies

Horticulture Research 2015年第1期2卷 234-241页

作者： JoséManuel Donoso Iban Eduardo Roger Picañol Ignasi Batlle werner howad María JoséAranzana Pere Arús IRTA Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB-UB Campus UAB Bellaterra(Cerdanyola del Vallès)08193 BarcelonaSpain IRTA.Centre de Mas de Bover.Crta.De Reus–El Morell Km 3.8.43120 Constantί TarragonaSpain INIA Av.Salamanca s/nSector Los ChoapinosRengoChile Rijk Zwaan Finca La Marina-Pj Lo Contreras s/n30395 La PueblaCartagenaSpain

Peach(Prunus persica)and almond(Prunus dulcis)are two sexually compatible species that produce fertile offspring.Almond,a highly polymorphic species,is a potential source of new genes for peach that has a strongly eroded gene pool.Here we describe the genetics of a male sterile phenotype that segregated in two almond(‘Texas’)×peach(‘Earlygold’)progenies:an F2(T×E)and a backcross one(T1E)to the‘Earlygold’parent.High-density maps were developed using a 9k peach SNP chip and 135 simple-sequence repeats.Three highly syntenic and collinear maps were obtained:one for the F2(T×E)and two for the backcross,T1E(for the hybrid)and E(for‘Earlygold’).A major reduction of recombination was observed in the interspecific maps(T×E and T1E)compared to the intraspecific parent(E).The E map also had extensive monomorphic genomic regions suggesting the presence of large DNA fragments identical by descent.Our data for the male sterility character were consistent with the existence of cytoplasmic male sterility,where individuals having the almond cytoplasm required the almond allele in at least one of two independent restorer genes,Rf1 and Rf2,to be fertile.The restorer genes were located in a 3.4 Mbp fragment of linkage group 2(Rf1)and 1.4 Mbp of linkage group 6(Rf2).Both fragments contained several genes coding for pentatricopeptide proteins,demonstrated to be responsible for restoring fertility in other species.The implications of these results for using almond as a source of novel variability in peach are discussed.

关键词： linkage restore mapping

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Pedigree analysis of 220 almond genotypes reveals two world mainstream breeding lines based on only three different cultivars

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Horticulture Research 2021年第1期8卷 72-82页

作者： Felipe Perez de los Cobos Pedro J.Martinez-Garcia Agusti Romero Xavier Miarnau Iban Eduardo werner howad Mourad Mnejja Federico Dicenta Rafel Socias i Company Maria J.Rubio-Cabetas Thomas M.Gradziel Michelle Wirthensohn Henri Duval Doron Holland Pere Arus Francisco J.Vargas Ignasi Batlle Institut de Recerca i Tecnologia Agroalimentaries(IRTA) Mas BoveCtra.Reus-El Morell Km 3843120 ConstantiTarragonaSpain Institut de Recerca i Tecnologia Agroalimentaries(IRTA) Centre de Recerca en Agrigenomica(CRAG)CSIC-IRTA-UAB-UB.Cerdanyola del Valles(Bellaterra)08193 BarcelonaSpain Centro de Edafologia y Biologia Aplicada del Segura Consejo Superior de Investigaciones Cientificas(CEBAS-CSIC)P.O.Box 16430100 EspinardoMurciaSpain Institut de Recerca i Tecnologia Agroalimentaries(IRTA) FruitcentrePCiTALGardeny ParkFruitcentre Building25003 LleidaSpain Centro de Investigacion y Tecnologia Agroalimentaria de Aragon(CITA) Avda.Montanana 93050059ZaragozaInstituto Agroalimentario de Aragon IA2(CITA-Universidad de Zaragoza)ZaragozaSpain University of California 1 Shields AvenueDavisCA 95616USA University of Adelaide Waite ResearchSchool of AgricultureFood and WinePMB 1Glen OsmondAdelaideSA 5064Australia Institut National de la Recherche Agronomique(INRA) Domain St.Maurice CS 6009484143 Montfavet CedexFrance Agricultural Research Organization Newe-Ya’ar Research CenterP.O.Box 1021Ramat Yishad 30095Israel

Loss of genetic variability is an increasing challenge in tree breeding programs due to the repeated use of a reduced number of founder genotypes.However,in almond,little is known about the genetic variability in current breeding stocks,although several cases of inbreeding depression have been reported.To gain insights into the genetic structure in modern breeding programs worldwide,marker-verified pedigree data of 220 almond cultivars and breeding selections were analyzed.Inbreeding coefficients,pairwise relatedness,and genetic contribution were calculated for these genotypes.The results reveal two mainstream breeding lines based on three cultivars:“Tuono”,“Cristomorto”,and“Nonpareil”.Descendants from“Tuono”or“Cristomorto”number 76(sharing 34 descendants),while“Nonpareil”has 71 descendants.The mean inbreeding coefficient of the analyzed genotypes was 0.041,with 14 genotypes presenting a high inbreeding coefficient,over 0.250.Breeding programs from France,the USA,and Spain showed inbreeding coefficients of 0.075,0.070,and 0.037,respectively.According to their genetic contribution,modern cultivars from Israel,France,the USA,Spain,and Australia trace back to a maximum of six main founding genotypes.Among the group of 65 genotypes carrying the S f allele for self-compatibility,the mean relatedness coefficient was 0.125,with“Tuono”as the main founding genotype(24.7%of total genetic contribution).The results broaden our understanding about the tendencies followed in almond breeding over the last 50 years and will have a large impact into breeding decision-making process worldwide.Increasing current genetic variability is required in almond breeding programs to assure genetic gain and continuing breeding progress.

关键词： breeding cultivar founding

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李属过敏原蛋白家族的基因组特征及其与苹果属的同一性分析

李属过敏原蛋白家族的基因组特征及其与苹果属的同一性分析

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中国园艺学会十届二次理事会暨学术研讨会

作者：陈琳高中山宋丽娟张水明 Eudald Illa werner howad Eric van de Weg Pere Arus 陈昆松浙江大学果树科学研究所

蔷薇科许多李属水果如桃,李子,樱桃和杏在国际上经常被报道为重要的食物过敏来源,以往研究表明,鲜食水果过敏性程度因种和品种而异,通过育种手段可以选择低或无过敏性的新品种。开展育种工作首先需要了解过敏基因成员、连锁图谱定位和...

蔷薇科许多李属水果如桃,李子,樱桃和杏在国际上经常被报道为重要的食物过敏来源,以往研究表明,鲜食水果过敏性程度因种和品种而异,通过育种手段可以选择低或无过敏性的新品种。开展育种工作首先需要了解过敏基因成员、连锁图谱定位和相关遗传标记。根据目前临床医学和

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