Polygenic Heritability of Rose Root Rot Disease Resistance in Offspring of Rosa multiflora  

作　　者：Defeng ZHUANG Lianhua LI Ce MA Fumitada NAGAOKA Yoichi ASANO Koji KAGEYAMA Masaki OCHIAI Hirokazu FUKUI 

机构地区：[1]Liaoning Research Institute of Cash Crop,Liaoyang 111000,China [2]International Cooperation,Liaoning Academy of Agricultural Sciences,84 Dongling Road,Shenyang 110161,China [3]Faculty of Applied Biological Sciences,Gifu University,Yanagido,Gifu 501-1193,Japan [4]Flower Festival Commemorative Park,1584-1 Seta,Kani 509-0213,Japan [5]River Basin Research Centre,Gifu University,Yanagido,Gifu 501-1193,Japan

出　　处：《Agricultural Biotechnology》2019年第3期21-24,28,共5页农业生物技术（英文版）

基　　金：Supported by the Doctoral Scientific Research Foundation of Liaoning Province

摘　　要：Rose root rot disease caused by Pythium helicoides Drechsler has brought heavy damage to cut rose production in Japan,and it has became apparent that Rosa multiflora showed resistance to this disease.Roses have been bred by interspecies crossing with Rosa species including of R.multiflora,and many progenies of R.multiflora have been bred as determined cluster-flowered roses.However,the genetic architecture of this resistance remains.So,in this study,four kinds of R.multiflora and 21 rose cultivars that have been clarified in the cross-fertilization genealogy with R.multiflora were used as plant materials,and the inheritability of resistance to root rot disease was investigated.Four kinds of R.multiflora had all high resistance,and the resistance to root rot disease in R.multiflora was inherent characteristic of species.Five varieties not less than 50% in relatedness with R.multiflora were shown as varied ‘resistant’ and ‘moderately resistant’.Therefore,the inherent resistant characteristic in R.multiflora was not controlled by single major gene,and the resistibility in R.multiflora was not cytoplasmic but nuclear heredity.Although there was significant negative relation between relative root rot severity and relatedness with R.multiflora,the variance of relative root rot severity had tendency to expand as relatedness with R.multiflora reduced.This result,therefore,indicated that the contingency of resistance expression increased as the relatedness with R.multiflora was reduced.The varieties having low degree of relatedness with R.multiflora had similar relative root rot severity with R.multiflora.These results indicated that we would be able to select resistant roses from progenies crossed with R.multiflora.Rose root rot disease caused by Pythium helicoides Drechsler has brought heavy damage to cut rose production in Japan, and it has became apparent that Rosa multiflora showed resistance to this disease. Roses have been bred by interspecies crossing with Rosa species including of R. multiflora, and many progenies of R. multiflora have been bred as determined cluster-flowered roses. However, the genetic architecture of this resistance remains. So, in this study, four kinds of R. multiflora and 21 rose cultivars that have been clarified in the cross-fertilization genealogy with R. multiflora were used as plant materials, and the inheritability of resistance to root rot disease was investigated. Four kinds of R. multiflora had all high resistance, and the resistance to root rot disease in R. multiflora was inherent characteristic of species. Five varieties not less than 50% in relatedness with R. multiflora were shown as varied ‘resistant’ and ‘moderately resistant’. Therefore, the inherent resistant characteristic in R. multiflora was not controlled by single major gene, and the resistibility in R. multiflora was not cytoplasmic but nuclear heredity. Although there was significant negative relation between relative root rot severity and relatedness with R. multiflora, the variance of relative root rot severity had tendency to expand as relatedness with R. multiflora reduced. This result, therefore, indicated that the contingency of resistance expression increased as the relatedness with R. multiflora was reduced. The varieties having low degree of relatedness with R. multiflora had similar relative root rot severity with R. multiflora. These results indicated that we would be able to select resistant roses from progenies crossed with R. multiflora.

关 键 词：Inheritance PYTHIUM helicoides Resistance ROSE root rot 

分 类 号：S[农业科学]