Simultaneous improvement and genetic dissection of grain yield and its related traits in a backbone parent of hybrid rice (Oryza sativa L.) using selective introgression

doi:10.1007/s11032-012-9782-z

	Simultaneous improvement and genetic dissection of grain yield and its related traits in a backbone parent of hybrid rice (Oryza sativa L.) using selective introgression
	Zhang, Hongjun 1; Wang, Hui 1; Qian, Yiliang 1,2; Xia, Jiafa 3; Li, Zefu 3; Shi, Yingyao 1,2; Zhu, Linghua 1; Ali, Jauhar 4; Gao, Yongming 1; Li, Zhikang 1
刊名	MOLECULAR BREEDING
	2013
卷号	31 期号:1 页码:181-194
关键词	Complex traits Quantitative trait loci (QTL) Association groups Allelic diversity QTL by environment interaction
ISSN号	1380-3743
DOI	10.1007/s11032-012-9782-z
通讯作者	Zhang, Hongjun
英文摘要	Three populations with a total of 125 BC2F3:4 introgression lines (ILs) selected for high yields from three BC2F2 populations were used for genetic dissection of rice yield and its related traits. The progeny testing in replicated phenotyping across two environments and genotyping with 140 polymorphic simple sequence repeat markers allowed the identification of 21 promising ILs that had significantly higher yields than the recurrent parent Shuhui527 (SH527). A total of 94 quantitative trait loci (QTL) were identified using the selective introgression method based on Chi-squared (chi (2)) and multi-locus probability tests and the RSTEP-LRT method based on stepwise regression. These QTL were mostly mapped to 12 clusters on seven rice chromosomes. Several important properties of the QTL affecting grain yield (GY) and its related traits were revealed. The first one was the presence of strong and frequent non-random associations between or among QTL that affect low-heritability traits (GY and spikelet number per panicle, SN) in the ILs with high trait values. Second, beneficial alleles at 88.9 % GY and 75 % SN QTL for increased productivity were from the donors, suggesting that direct phenotypic selection for high yield in our introgression breeding program was a powerful way to transfer beneficial alleles at many loci from the donors into SH527. Third, most QTL were in clusters with large effects on multiple traits, which should be the focal points in further investigations and marker-assisted selection in rice. The majority of the QTL identified were expressed only in one of the environments, suggesting that differential expression of QTL in different environments is the primary genetic basis of genotype x environment interaction. Finally, a large variation in both the direction and magnitude of QTL effects was detected for different donor alleles at seven QTL in the same genetic background and environments. This finding suggests the possible presence of functional diversity among the donor alleles at these loci. The promising ILs and QTL identified provide valuable materials and genetic information for further improving the yield potential of SH527, which is a backbone restorer of hybrid rice in China.
学科主题	Agronomy ; Plant Sciences ; Genetics & Heredity ; Horticulture ; AGRONOMY ; GENETICS & HEREDITY ; HORTICULTURE ; PLANT SCIENCES
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000313166400016
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/5094]
专题	作物科学研究所_遗传育种系
作者单位	1.Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China 2.Anhui Agr Univ, Coll Agr, Hefei 230036, Peoples R China 3.Anhui Acad Agr Sci, Rice Res Inst, Hefei 230031, Peoples R China 4.Int Rice Res Inst, Plant Breeding Genet & Biotechnol Div, Manila, Philippines
推荐引用方式 GB/T 7714	Zhang, Hongjun,Wang, Hui,Qian, Yiliang,et al. Simultaneous improvement and genetic dissection of grain yield and its related traits in a backbone parent of hybrid rice (Oryza sativa L.) using selective introgression[J]. MOLECULAR BREEDING,2013,31(1):181-194.
APA	Zhang, Hongjun.,Wang, Hui.,Qian, Yiliang.,Xia, Jiafa.,Li, Zefu.,...&Li, Zhikang.(2013).Simultaneous improvement and genetic dissection of grain yield and its related traits in a backbone parent of hybrid rice (Oryza sativa L.) using selective introgression.MOLECULAR BREEDING,31(1),181-194.
MLA	Zhang, Hongjun,et al."Simultaneous improvement and genetic dissection of grain yield and its related traits in a backbone parent of hybrid rice (Oryza sativa L.) using selective introgression".MOLECULAR BREEDING 31.1(2013):181-194.