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Breeding and Utilization of Japonicalinous CMS Line Chunjiang 19A with Wide Compatibility and High Outcrossing Rate 被引量:2
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作者 林建荣 宋昕蔚 +1 位作者 吴明国 阮关海 《Agricultural Science & Technology》 CAS 2012年第3期537-540,共4页
[Objective] To breed and utilize the japonicalinous cytoplasmic male sterile (CMS) line Chunjiang 19A with wide compatibility and high outcrossing rate. [Method] Cbunjiang 16A was used as the female parent to cross ... [Objective] To breed and utilize the japonicalinous cytoplasmic male sterile (CMS) line Chunjiang 19A with wide compatibility and high outcrossing rate. [Method] Cbunjiang 16A was used as the female parent to cross with Indica-Japonica crossing material B125, which was used as male parent. Backcross breeding was contin- ued for consecutive generations to breed the CMS lines with wide compatibility and high outcrossing rate. [Result] Chunjiang 19A is a late medium Japonica CMS line with good fertility stability. The proportion of sterile plants and pollen abortion rates are 100% and the Cheng's index is 14. It is the japonicalinous CMS line with early flowering, partial stigma exsertion, high outcrossing rate, wide compatibility, high re- sistance to stripe disease and good combining ability. The hybrid rice combinations originated from Chunjiang 19A have strong tUlering ability, dominant heterosis, high resistance to stripe disease, great yield potential and good color change at mature stage. [Conclusion] The successful breeding of Chunjiang 19A laid good foundation for the breeding of Japonica hybrid rice and Indica-Japonica hybrid rice combinations with high seed production and dominant heterosis, showing a promising application prospect. 展开更多
关键词 Japonicalinous CMS line Chunjiang 19A High outcrossing rate wide compatibility BREEDING
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Genetic Improvement and Biological Characteristic Analysis of Dwarf Abortive TypeJaponicaCMS Lines with Wide Compatibility 被引量:1
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作者 SONG Xin-wei LIN Jian-rong WU Ming-guo 《Agricultural Science & Technology》 CAS 2011年第7期980-984,996,共6页
From the view of methodology for genetic improvement ofJaponicacytoplasmic male sterile(CMS) lines,we introduced the breeding process of the dwarf-abortive type(DA type)JaponicaCMS line Chunjiang 95A with wide compati... From the view of methodology for genetic improvement ofJaponicacytoplasmic male sterile(CMS) lines,we introduced the breeding process of the dwarf-abortive type(DA type)JaponicaCMS line Chunjiang 95A with wide compatibility,and further investigated the biological characteristics of the DA type Chunjiang 95A and its isonuclear alloplasmic CMS line Dian-I type Chunjiang 95A.The results show that DA type Chunjiang 95A is a japonicalinous CMS line and mainly typical abortive,which is better in fertility stability than stained abortive typeJaponica CMS lines.The DA type Chunjiang 95A is featured with high stigma exsertion,good flowering habit,high outcrossing rate and wide compatibility.Its recoverability differs from stained abortive typeJaponicaCMS lines.Moreover,we discussed genetic improvement of the typical abortive type JaponicaCMS lines and the application prospects of heterosis. 展开更多
关键词 wide compatibility Japonica rice CMS line Stigma exsertion BREEDING
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Use of IR36ms for greening wide compatibility variety(WCV)
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作者 ZHANG Xiaoming XI Yong’an LIN Yizi Crop Research Inst,Zhejiang Acad of Agri Sci (ZAAS),Hangzhou 310021,China 《Chinese Rice Research Newsletter》 1994年第2期2-3,共2页
IR36 has been used as an indica tester in screeningWCVs.However,artificial emasculation is not on-ly a time consuming work,but also may producefalse hybrids due to incomplete emasculation,andmay injure stigmata and ov... IR36 has been used as an indica tester in screeningWCVs.However,artificial emasculation is not on-ly a time consuming work,but also may producefalse hybrids due to incomplete emasculation,andmay injure stigmata and ovary which will result ina decrease of spikelet fertility.We studied the possi- 展开更多
关键词 IR Use of IR36ms for greening wide compatibility variety WCV
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Selection of wide compatible restorer lines and their application in hybrid rice breeding
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作者 XIE Xiaobo, ZHANG Shanqing, and FANG Hongming, CNRRI, Hangzhou 310006, China 《Chinese Rice Research Newsletter》 1997年第3期10-11,共2页
Since the middle of 1980’s, wide compatibility(WC) rice lines have been screened by ricebreeders in China and applied in hybrid ricebreeding program. Several WC lines such asPecos, T984, Lunhui 422, and 02428 withide... Since the middle of 1980’s, wide compatibility(WC) rice lines have been screened by ricebreeders in China and applied in hybrid ricebreeding program. Several WC lines such asPecos, T984, Lunhui 422, and 02428 withideal agronomic characters were identified. Weincorporated the WC gene into restorer linesby crossing these japonica WC lines with ob-tained indica lines. Some WC restorer lineswith indica-japonica medium type were ob-tained and their application value in intersub-specific hybrid rice breeding were evaluated. 1. Effect of crossing methods on selectionefficiencies of WC restorer lines 展开更多
关键词 line WC Selection of wide compatible restorer lines and their application in hybrid rice breeding
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Plant Regeneration from Protoplasts of Wide Compatible Rice
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作者 YAN Qiusheng ZHANG Xueqin Department of Biotechnology,CNRRI,Hangzhou 310006,China 《Chinese Rice Research Newsletter》 1990年第1期2-3,共2页
Rice selection 02428 and T984(Oryzasativa L.ssp.japonica)were germplasmresources with wide compatibility.Mature embryos of rice cultured on Lin-smaier and Skoog medium with 2.5 mg/l2,4-D,1.0 mg/l thiamine-HCL,3%(W/V)s... Rice selection 02428 and T984(Oryzasativa L.ssp.japonica)were germplasmresources with wide compatibility.Mature embryos of rice cultured on Lin-smaier and Skoog medium with 2.5 mg/l2,4-D,1.0 mg/l thiamine-HCL,3%(W/V)sucrose and 0.7%(W/V)agar,pH 5.8(LS2.5)were used for callus initiation.Cultures were 展开更多
关键词 wide Plant Regeneration from Protoplasts of wide Compatible Rice
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SSR Cluster and Fertility Loci Analysis of GC13 被引量:2
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作者 NONG Bao-xuan XIA Xiu-zhong +3 位作者 LIANG Yao-mao LU Gang ZHANG Zong-qiong LI Dan-ting 《Agricultural Science & Technology》 CAS 2011年第6期832-835,共4页
[Objective] The research aimed to clarify the genetic mechanism of special wide compatibility of GC13.[Method] The clustering analyses of GC13,five indica,five japonica and five wide compatibility varieties were carri... [Objective] The research aimed to clarify the genetic mechanism of special wide compatibility of GC13.[Method] The clustering analyses of GC13,five indica,five japonica and five wide compatibility varieties were carried out by using 70 SSR primers.[Result] GC13 was clustered into japonica group and had far genetic relationship with indica and wide compatibility variety.Two fertility loci were detected in GC13,in which one closely linked to RM225 on chromosome 6.According to the position on the chromosome,it speculated that this locus was allelic to S5.GC13 carried the allelic gene S5-n at this locus.The other locus closely linked to RM408 on chromosome 8 and was provisionally designated as Sg(t).At this locus,GC13 carried Sg(t)-i allelic gene,which was consistent with IR36.The effect of S5 locus was stronger than that of Sg(t).[Conclusion] The research laid the good foundation for using the wide compatibility line GC13 to breed the hybrid between subspecies. 展开更多
关键词 Special wide compatibility line GC13 Fertility locus SSR clustering
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Artificial Selection in Domestication and Breeding Prevents Speciation in Rice 被引量:8
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作者 Jiaming Mi Guangwei Li +8 位作者 Conghao Xu Jiangyi Yang Huihui Yu Gongwei Wang Xianghua Li Jinghua Xiao Huazhi Song Qifa Zhang Yidan Ouyang 《Molecular Plant》 SCIE CAS CSCD 2020年第4期650-657,共8页
Speciation has long been regarded as an irreversible process once the reproductive barriers had been established.However,unlike in natural populations,artificial selection might either accelerate or prevent speciation... Speciation has long been regarded as an irreversible process once the reproductive barriers had been established.However,unlike in natural populations,artificial selection might either accelerate or prevent speciation processes in domesticated species.Asian cultivated rice is a target crop for both domestication and artificial breeding;it contains two subspecies of indica and japonica,which usually produce sterile inter-subspecific hybrids due to reproductive barriers.In this study,we constructed the evolutionary trajectory of a reproductive isolation system S5,which regulates fertility in indica-japonica hybrids via three adjacent genes,based on the data of 606 accessions including two cultivated and 11 wild rice species.Although hybrid sterility haplotypes at S5 lead to establishment of a killer-protector reproductive barrier,origin of wide-compatibility haplotypes by complex hybridization and recombination provides an opposing force to reproductive isolation and thus prevents speciation during domestication.Analysis in a diallel set of 209 crosses involving 21 parents showed that the wide-compatibility genotypes largely rescued fertility of indica-japonica hybrids,indicating that the wide-compatibility gene would enable gene flow to maintain species coherence.This counteracting system indicates that combined effects of natural evolution and artificial selection may result in reversible processes of speciation in rice,which may also have implications for genetic improvement of rice. 展开更多
关键词 RICE reproductive isolation SPECIATION hybrid sterility wide compatibility artificial selection
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