Genetic dissection of intersubgenomic heterosis in Brassica napus carrying genomic components of B. rapa

Fu, Donghui; Qian, Wei; Zou, Jun; Meng, Jianghong

doi:10.1007/s10681-011-0533-8

Cited by 17 publications

(9 citation statements)

References 42 publications

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“…To this end, major effort has been put towards exploring and utilizing subgenomic variation within each of the Brassica A, B and C subgenomes and between species for B. napus crop improvement. Both targeted gene transfer and whole-genome introgressions into B. napus have been carried out via interspecific crosses, significantly broadening the genetic base of B. napus and promoting trait improvement and hybrid heterosis (Becker et al, 1995;Chatterjee et al, 2015;Chen et al, 2010;Fu et al, 2012;Li et al, 2014b;Rahman, 2001;Schranz and Osborn, 2000).…”

Section: Introductionmentioning

confidence: 99%

Genetic changes in a novel breeding population of Brassica napus synthesized from hundreds of crosses between B. rapa and B. carinata

Zou

Mason

et al. 2017

Plant Biotechnology Journal

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SummaryIntrogression of genomic variation between and within related crop species is a significant evolutionary approach for population differentiation, genome reorganization and trait improvement. Using the Illumina Infinium Brassica 60K SNP array, we investigated genomic changes in a panel of advanced generation new‐type Brassica napus breeding lines developed from hundreds of interspecific crosses between 122 Brassica rapa and 74 Brassica carinata accessions, and compared them with representative accessions of their three parental species. The new‐type B. napus population presented rich genetic diversity and abundant novel genomic alterations, consisting of introgressions from B. rapa and B. carinata, novel allelic combinations, reconstructed linkage disequilibrium patterns and haplotype blocks, and frequent deletions and duplications (nonrandomly distributed), particularly in the C subgenome. After a much shorter, but very intensive, selection history compared to traditional B. napus, a total of 15 genomic regions with strong selective sweeps and 112 genomic regions with putative signals of selective sweeps were identified. Some of these regions were associated with important agronomic traits that were selected for during the breeding process, while others were potentially associated with restoration of genome stability and fertility after interspecific hybridization. Our results demonstrate how a novel method for population‐based crop genetic improvement can lead to rapid adaptation, restoration of genome stability and positive responses to artificial selection.

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Section: Introductionmentioning

confidence: 99%

Genetic changes in a novel breeding population of Brassica napus synthesized from hundreds of crosses between B. rapa and B. carinata

Zou

Mason

et al. 2017

Plant Biotechnology Journal

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“…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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“…Interspecific hybridization in Brassica can induce a number of genetic change in the genome through homoeologous recombination between the chromosomes (Udall et al, 2005;Leflon et al, 2006;Zou et al, 2011) and this can create new genetic variation and exert significant effect on seed yield (Zou et al, 2011;Fu et al, 2012). While working with B. napus × B. rapa interspecific cross, Fu et al (2012) found that the novel alleles generated in the progeny of this interspecific cross can contribute to heterosis for seed yield in B. napus through allelic and non-allelic interactions. Zou et al (2010) found improved agronomic performance and strong heterosis for seed yield in hybrids of natural B. napus and B. napus lines carrying A and C genome contents introgressed from B. rapa and B. carinata, respectively.…”

Section: Discussionmentioning

confidence: 99%

Potential of the C Genome of the Different Variants of Brassica oleracea for Heterosis in Spring B. napus Canola

et al. 2020

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The genetic base of Brassica napus canola need to be broadened for exploitation of heterosis at a greater level in the breeding of F 1 hybrid canola cultivars. In this study, we evaluated 228 inbred B. napus canola lines derived from six B. napus × B. oleracea interspecific crosses and following two breeding methods (F 2-and BC 1-derived lines) to understand the effect of the B. oleracea alleles on heterosis for different agronomic and seed quality traits. Test hybrids of the inbreds derived from crosses involving vars. botrytis (cauliflower), alboglabra (Chinese kale) and capitata (cabbage) cv. Badger Shipper, on an average, gave about 10% mid-parent heterosis (MPH), and about 67% of the test hybrids gave higher seed yield than the common B. napus parent indicating that B. oleracea alleles can contribute to heterosis for seed yield in spring B. napus canola hybrids. This was also evident from a positive correlation of the genetic distance of the inbred lines from the common B. napus parent with MPH for seed yield (r = 0.31) as well as with hybrid yield (r = 0.26). Almost no correlation was found between genetic distance and MPH for seed oil and protein content as well as with the performance of the test hybrids for these two traits. The occurrence of positive correlation between seed yield of the inbred lines and test hybrids suggested the importance of the genes exerting additive effect for high seed yield in the hybrids. Very little or almost no heterosis was found for the other agronomic traits as well as for seed oil and protein content. While comparing the two breeding methods, no significant difference was found for seed yield of the test hybrids or the level of MPH; however, the BC 1-derived inbred and test hybrid populations flowered and matured earlier and had longer grain-filling period than the F 2-derived population. Thus, the results suggested that the B. oleracea gene pool can be used in the breeding of spring B. napus canola to improve seed yield in hybrid cultivars.

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Genetic dissection of intersubgenomic heterosis in Brassica napus carrying genomic components of B. rapa

Cited by 17 publications

References 42 publications

Genetic changes in a novel breeding population of Brassica napus synthesized from hundreds of crosses between B. rapa and B. carinata

Genetic changes in a novel breeding population of Brassica napus synthesized from hundreds of crosses between B. rapa and B. carinata

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

Potential of the C Genome of the Different Variants of Brassica oleracea for Heterosis in Spring B. napus Canola

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