Improvement of Brassica napus via interspecific hybridization between B. napus and B. oleracea

Li, Qinfei; Zhou, Qinghong; Mei, Jiaqin; Zhang, Yongjing; Li, Jiana; Li, Zaiyun; Ge, Xianhong; Xiong, Zhiyong; Huang, Yinjing; Qian, Wei

doi:10.1007/s11032-014-0153-9

Cited by 27 publications

(19 citation statements)

References 54 publications

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“…Riaz et al (2001) evaluated 12 hybrids involving parents from different genetic diversity groups and reported highest MPH and high-parent heterosis for the hybrids that involved a parental line derived from a B. napus × B. oleracea cross that was developed by Quazi (1988). Recently, Li et al (2014) Radoev et al (2008) found mainly dominance and overdominance effects of the genes contributing to heterosis. The low seed yield in the IN inbred population was apparently attributable to introduction of several unfavorable alleles from B. oleracea, and this is not very uncommon for the inbred lines derived from interspecific crosses.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have demonstrated the value of utilizing allelic diversity of the allied Brassica species for increased heterosis in B. napus (Qian et al, 2005;Li et al, 2006;Zou et al, 2010;Girke et al, 2011Girke et al, , 2012Jesske et al, 2013;Li et al, 2014). For example, Zou et al (2010) observed a high level of heterosis in test hybrids while using germplasm diversified with the A genome of B. rapa and the C genome of B. carinata.…”

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confidence: 99%

“…Thus, most of the studies conducted to date to evaluate different gene pools of Brassica for the improvement of spring or winter or semi-winter B. napus were focused on either the use of spring B. napus for spring type hybrid (Grant and Beversdorf, 1985;Brandle and McVetty, 1990;Engqvist and Becker, 1991;Diers et al, 1996;Cuthbert et al, 2009), or the use of winter or semi-winter B. napus for spring type hybrid (Butruille et al, 1999;Udall et al, 2004;Quijada et al, 2004Quijada et al, , 2006Qian et al, 2007;Kramer et al, 2009), or the use of winter or semi-winter B. napus for winter type hybrid (Lefort-Buson et al, 1987;Qian et al, 2009), or the use of the allied species for winter or semiwinter (Gehringer et al, 2007;Radoev et al, 2008;Zou et al, 2010;Fu et al, 2012;Girke et al, 2012;Li et al, 2014) or spring Seyis et al, 2006) type of hybrid. However, so far, no study has been conducted to compare the value of different gene pools for increasing the level of heterosis and seed yield in spring B. napus hybrid canola.…”

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Patterns of Heterosis in Three Distinct Inbred Populations of Spring Brassica napus Canola

2016

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Allelic diversity of the allied species of Brassica napus L. as well as of the winter form of this species has been demonstrated to be related with increasing productivity of hybrid spring B. napus cultivars. To compare potential value of the different gene pools of Brassica species three spring B. napus inbred populations were developed by use of a B. oleracea L. line, a spring B. napus breeding line, and a winter B. napus cultivar crossed to a spring B. napus ‘Hi‐Q’; and test hybrids of these inbred lines were produced by crossing with Hi‐Q as the common tester. Mid‐parent heterosis (MPH) showed a negative correlation with seed yield of the inbred lines in all three populations; however, a positive correlation existed between seed yield of the inbred lines and heterosis over Hi‐Q (HiQH) (or, inbred vs. hybrid yield). On average, the level of MPH in hybrid of the inbred lines derived from B. napus × B. oleracea cross was twice greater than the level of heterosis found for the inbred lines derived from spring × spring or winter × spring B. napus crosses. The inbred population derived from winter × spring cross gave highest seed yield, and this population also gave highest HiQH. The results suggested that B. oleracea and winter canola could be used in spring B. napus canola breeding for accumulating additive and non‐additive effect genes for increased seed yield in hybrid cultivars.

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Section: Discussionmentioning

confidence: 99%

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Patterns of Heterosis in Three Distinct Inbred Populations of Spring Brassica napus Canola

2016

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“…The genus Brassica , consisting of six species, including B. napus , is comprised of A, B and C basic genomes, which can be divided into different subgenomes (A r /A n /A j , C n /C o /C c and B j /B c /B n ), and harbours rich variation not only among the genomes but also among the subgenomes (Chalhoub et al ., ; Cheng et al ., ; Liu et al ., ; Navabi et al ., ; Parkin et al ., ; Pires et al ., ; Warwick et al ., ; Yang et al ., ; Zou et al ., ). To utilize the variation among the different basic genomes and different subgenomes to broaden the genetic diversity of B. napus , many studies have introgressed genomic regions from a single related species and even other genera, such as B. rapa (Qian et al ., ), B. oleracea (Li et al ., ; Quazi, ), Brassica juncea (Roy, ), B. carinata (Navabi et al ., , ), Brassica maurorum (Chrungu et al ., ), Sinapis arvensis (Hu et al ., ) and Isatis indigotica (Kang et al ., ). In addition, substantial efforts have been extended to resynthesize B. napus by combining the genomes from two or more species, such as crossing B. rapa with B. oleracea (Becker et al ., ; Hansen and Earle, ; Nagaharu, ), B. juncea with B. carinata (Chatterjee et al ., ), and B. carinata with B. rapa (Li et al ., , ; Xiao et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Reconstituting the genome of a young allopolyploid crop, Brassica napus, with its related species

Zhang

et al. 2019

Plant Biotechnology Journal

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Summary Brassica napus (A n A n C n C n ) is an important worldwide oilseed crop, but it is a young allotetraploid with a short evolutionary history and limited genetic diversity. To significantly broaden its genetic diversity and create a novel heterotic population for sustainable rapeseed breeding, this study reconstituted the genome of B. napus by replacing it with the subgenomes from 122 accessions of Brassica rapa (A r A r ) and 74 accessions of Brassica carinata (B c B c C c C c ) and developing a novel gene pool of B. napus through five rounds of extensive recurrent selection. When compared with traditional B. napus using SSR markers and high‐throughput SNP /Indel markers through genotyping by sequencing, the newly developed gene pool and its homozygous progenies exhibited a large genetic distance, rich allelic diversity, new alleles and exotic allelic introgression across all 19 AC chromosomes. In addition to the abundant genomic variation detected in the AC genome, we also detected considerable introgression from the eight chromosomes of the B genome. Extensive trait variation and some genetic improvements were present from the early recurrent selection to later generations. This novel gene pool produced equally rich phenotypic variation and should be valuable for rapeseed genetic improvement. By reconstituting the genome of B. napus by introducing subgenomic variation within and between the related species using intense selection and recombination, the whole genome could be substantially reorganized. These results serve as an example of the manipulation of the genome of a young allopolyploid and provide insights into its rapid genome evolution affected by interspecific and intraspecific crosses.

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“…The cytological relationships and genomic homology among the species provide a major opportunity to generate novel Brassica germplasms, or even novel species, such as Brassica hexaploids, via interspecific hybridization in Brassica (Chen et al, 2011; Mason and Batley, 2015). To improve the major rapeseed species, B. napus , extensive and successful efforts have been made to broaden the genetic basis, and introduce several specific traits from related species (Prakash and Raut, 1983; Meng et al, 1998; Ren et al, 2000; Xiao et al, 2010; Girke et al, 2012a,b; Li et al, 2014). Utilizing the subgenomic differentiation within and between Brassica species would also be helpful to broaden the genetic base of B. juncea and explore inter-subgenomic heterosis.…”

Section: Introductionmentioning

confidence: 99%

Introgressing Subgenome Components from Brassica rapa and B. carinata to B. juncea for Broadening Its Genetic Base and Exploring Intersubgenomic Heterosis

Wei¹,

Wang²,

Chang³

et al. 2016

Front. Plant Sci.

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Brassica juncea (AjAjBjBj), is an allotetraploid that arose from two diploid species, B. rapa (ArAr) and B. nigra (BnBn). It is an old oilseed crop with unique favorable traits, but the genetic improvement on this species is limited. We developed an approach to broaden its genetic base within several generations by intensive selection. The Ar subgenome from the Asian oil crop B. rapa (ArAr) and the Bc subgenome from the African oil crop B. carinata (BcBcCcCc) were combined in a synthesized allohexaploid (ArArBcBcCcCc), which was crossed with traditional B. juncea to generate pentaploid F1 hybrids (ArAjBcBjCc), with subsequent self-pollination to obtain newly synthesized B. juncea (Ar/jAr/jBc/jBc/j). After intensive cytological screening and phenotypic selection of fertility and agronomic traits, a population of new-type B. juncea was obtained and was found to be genetically stable at the F6 generation. The new-type B. juncea possesses good fertility and rich genetic diversity and is distinctly divergent but not isolated from traditional B. juncea, as revealed by population genetic analysis with molecular markers. More than half of its genome was modified, showing exotic introgression and novel variation. In addition to the improvement in some traits of the new-type B. juncea lines, a considerable potential for heterosis was observed in inter-subgenomic hybrids between new-type B. juncea lines and traditional B. juncea accessions. The new-type B. juncea exhibited a stable chromosome number and a novel genome composition through multiple generations, providing insight into how to significantly broaden the genetic base of crops with subgenome introgression from their related species and the potential of exploring inter-subgenomic heterosis for hybrid breeding.

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Improvement of Brassica napus via interspecific hybridization between B. napus and B. oleracea

Cited by 27 publications

References 54 publications

Patterns of Heterosis in Three Distinct Inbred Populations of Spring Brassica napus Canola

Patterns of Heterosis in Three Distinct Inbred Populations of Spring Brassica napus Canola

Reconstituting the genome of a young allopolyploid crop, Brassica napus, with its related species

Introgressing Subgenome Components from Brassica rapa and B. carinata to B. juncea for Broadening Its Genetic Base and Exploring Intersubgenomic Heterosis

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