Structural and Expressional Variation Analyses of Mitochondrial Genomes Reveal Candidate Transcripts for the SV Cytoplasmic Male Sterility in Wheat (Triticum aestivum L.)
Common wheat (Triticum aestivum L.) is one of the most important crops,and intra-specific wheat hybrids have obvious heterosis in yield and protein quality.Therefore,utilization of hybrid wheat varieties offers an effective way to increase yield and nutrition.Cytoplasmic male sterility (CMS) systems are a useful genetic tool for hybrid crop breeding,and are ideal models for studying the genetic interaction and cooperative function of mitochondrial and nuclear genomes in plants (Schnable and Wise,1998;Hanson and Bentolila,2004).The breeding of hybrid wheat using male sterility caused by the cytoplasm of T.timopheevii has been studied since the early 1960's.But it is unsuccessful because there are some deficiencies in the practical application of this cytoplasm,including limited restoration resources,thin seeds,pre-harvest sprouting and lower germination rate (Wilson and Ross,1962).The Sv type of cytoplasmic male sterility (CMS-Sv) in wheat is general accessions for four types of CMS lines that were derived from four Aegilops species:Ae.kotschyi,Ae.variabilis,Ae.ventricosa,and Ae.bicornis.Based on the observation of alloplasmic lines produced in all possible combinations between 12 wheat nuclear genotypes and 47 cytoplasms of two related genera,Triticum (wheat) and Aegilops,Ogihara and Tsunewaki (1988) concluded that the D2-cytoplasm of Ae.crassa and its relatives,N-cytoplasm of Ae.uniaristata,and SV-cytoplasm of Ae.kotschyi and its relatives might be used as the alternative male sterile cytoplasm to replace the T.timopheevii cytoplasm for hybrid wheat breeding.Ikeguchi et al.(1999) proposed that spring-type hybrid wheat may be bred by combination of the 1BL-1RS chromosome and Ae.kotschyi cytoplasm with a new fertility-restorer gene discovered in a wheat variety Kitamiharu 48.Zhang et al.(1996) also proposed the use of CMS-Sv lines as the most effective male sterile cytoplasm.
40
the National Natural Science Foundation of China30971844;the Fundamental Research Funds of Northwest A & F UniversityQN2011003;China Postdoctoral Science Foundation to Wang Junwei20070410835;the Tang Zhong-Ying Breeding Funding Project of Northwest A & F University
2013-10-18（万方平台首次上网日期，不代表论文的发表时间）
共3页
437-439
