Genetic dissection of flowering time in Brassica rapa responses to temperature and photoperiod

Xiao, Dong; Shen, Hao; Zhao, Jian; Wei, Yan; Liu, Dong Rang; Hou, Xi Lin; Bonnema, Guusje

doi:10.1016/j.plantsci.2018.10.027

Cited by 14 publications

(6 citation statements)

References 47 publications

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“…Many morphological and biochemical characteristics depend on the age of the plant to the beginning of the visible transition to bolting. A 12 h photoperiod (short daylight hours) is optimal for growing vegetative mass in long-day plants, and 16 daylight hours accelerate the transition to bolting [44]. The parental forms of mapping populations differ with respect to the photoperiod: the oilseed sarson is highly sensitive to the length of daylight hours, the length of the vegetative period in pakchoi depends on the photoperiod to a moderate extent, and the root turnip is relatively neutral [1].…”

Section: The Timing Of Start Of Boltingmentioning

confidence: 99%

QTL Analysis of the Content of Some Bioactive Compounds in Brassica rapa L. Grown under Light Culture Conditions

et al. 2021

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The article presents the results of biochemical and QTL (Quantitative Trait Loci) analysis of dry matter content, nutrient and biologically active compounds: sugars, ascorbic acid, chlorophylls a and b, anthocyanins and carotenoids in populations of doubled haploid lines of leaf, root crops, and oilseeds of the Brassica rapa L. species grown in optimal light culture conditions, but with different photoperiod durations. The purpose of this study was to evaluate the effect of the photoperiod on the transition to bolting and the accumulation of biologically active substances, as well as how the localization and identification of chromosomal loci determined the content of certain phytochemicals. The influence of the length of daylight hours on the content of components of the biochemical composition was assessed. It was shown that growing under conditions of a 16 h photoperiod increased the content of dry matter, sugars, vitamin C, and anthocyanins. On the contrary, the content of photosynthetic pigments was higher under the conditions of a 12 h photoperiod. Valuable lines that can be sources of biologically active compounds were revealed. Based on the results of the obtained data, 102 QTLs were mapped, which determine the manifestation of the studied biochemical quality traits in the B. rapa doubled haploid lines under conditions of short and long daylight hours. Molecular markers genetically linked to the selected QTLs were determined. It was revealed that the identified loci controlling all the studied biochemical traits were mainly in the fifth, sixth, seventh, and ninth linkage groups, which correlated with the data obtained in the field and greenhouse. Most of the identified loci controlled several studied traits simultaneously. The identified QTLs and identified molecular markers are of interest for further study of the genetic control of the economically valuable traits determined by them and for the implementation of marker-assisted selection in B. rapa. The data obtained can be used in genetic and breeding work, including for the obtaining of new genotypes, lines and cultivars with a valuable biochemical composition, adapted for cultivation under specific photoperiodic conditions.

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Section: The Timing Of Start Of Boltingmentioning

confidence: 99%

QTL Analysis of the Content of Some Bioactive Compounds in Brassica rapa L. Grown under Light Culture Conditions

et al. 2021

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“…Variation in flowering time is a key feature of the life histories of flowering plants and determines crucial aspects of plant reproductive ecology. As such, there has been intense interest in determining the genetic architecture of this trait ( Fitter and Fitter 2002 ; Schlenker and Roberts 2009 ; Li et al 2010 ; Raman et al 2016 ; Xiao et al 2019 ). In Arabidopsis thaliana , for example, the precise timing of flowering transition is regulated by a complex hierarchical signalling network that integrates many environmental and endogenous stimuli ( Huijser and Schmid 2011 ; Weber and Burow 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Association between RsFT, RsFLC and RsCOL5 (A&B) expression and flowering regulation in Japanese wild radish

et al. 2021

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Flowering is an important step in the life cycle of plants and indicates adaptability to external climatic cues such as temperature and photoperiod. We investigated the expression patterns of core genes related to flowering time regulation in Japanese wild radish (Raphanus sativus var. raphanistroides Makino) with different vernalization requirements (obligate and facultative) and further identified climatic cues that may act as natural selective forces. Specifically, we analyzed flowering time variation under different cold and photoperiod treatments in Japanese wild radish collected from the Hokkaido (northern lineage) and Okinawa (southern lineage) islands, which experience contrasting climatic cues. The cultivation experiment verified the obligate and facultative vernalization requirements of the northern and southern wild radish accessions, respectively. The expression of major genes involved in flowering time indicated that RsFLC and RsCOL-5 (A&B) may interact to regulate flowering time. Notably, floral initiation in the northern lineage was strongly correlated with RsFLC expression, whereas flowering in the southern linage was correlated with induction of RsCOL5-A expression, despite high RsFLC transcript levels. These results suggested that the northern accessions are more sensitive to prolonged cold exposure, whereas the southern are more sensitive to photoperiod. These different mechanisms ultimately confer an optimal flowering time in natural populations in response to locally contrasting climatic cues. This study provides new insights into the variant mechanisms underlying floral pathways in Japanese wild radish from different geographic locations.

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“…The economically important crop, Brassica rapa, has long been cultivated worldwide, mainly as a vegetable foodstuff, such as Chinese cabbage and Pak-choi, and to a lesser extent for the production of fodder and oilseed, such as turnip rape and yellow sarson (Carpio et al 2011). Among agronomic traits in B. rapa, owering time (FT) is important because it affects the yield of seeds and the harvested crop's commercial quality (Wu et al 2012), thus determining their growing season and cultivation area (Xiao et al 2019). The regulation of FT is complex, involving multiple genes (quantitative trait loci (QTLs)) and is markedly affected by environmental conditions, making it a challenge to identify linked markers or related genes for marker assisted selection (MAS)-based breeding (Liu et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Fine Mapping and Analysis of Candidate Genes for qFT7.1, a Major Quantitative Trait Locus Controlling Flowering Time in Brassica Rapa L

Gao

Wang

et al. 2021

Preprint

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In Brassica rapa, flowering time (FT) is an important agronomic trait that affects the yield, quality, and adaption. FT a complicated trait that is regulated by many genes and is affected greatly by the environment. In this study, a chromosome segment substitution line (CSSL), CSSL16, was selected that showed later flowering than the recurrent parent, rapid-cycling inbred line of B. rapa (RcBr). Using Bulked Segregant RNA sequencing, we identified a late flowering quantitative trait locus (QTL), designated as qFT7.1, on chromosome A07 based on a secondary-F2 population derived from the cross between CSSL16 and RcBr. qFT7.1 was further validated by conventional QTL mapping. This QTL explained 39.9% (logarithm of odds = 32.2) of the phenotypic variations and was fine mapped to a 56.4-kb interval using recombinant analysis. Expression analysis suggests that BraA07g018240.3C, which is homologous with ATC (encoding Arabidopsis thaliana CENTRORADIALIS homologue), a gene for delayed flowering in Arabidopsis as the most promising candidate gene. Sequence analysis demonstrated that two synonymous mutations existed in the coding region and numerous bases replacements existed in promoter region between BraA07g018240.3C from CSSL16 and RcBr. The results will increase our knowledge related to the molecular mechanism of late flowering in B. rapa, and lay a solid foundation for the breeding of late bolting in B. rapa.

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Genetic dissection of flowering time in Brassica rapa responses to temperature and photoperiod

Cited by 14 publications

References 47 publications

QTL Analysis of the Content of Some Bioactive Compounds in Brassica rapa L. Grown under Light Culture Conditions

QTL Analysis of the Content of Some Bioactive Compounds in Brassica rapa L. Grown under Light Culture Conditions

Association between RsFT, RsFLC and RsCOL5 (A&B) expression and flowering regulation in Japanese wild radish

Fine Mapping and Analysis of Candidate Genes for qFT7.1, a Major Quantitative Trait Locus Controlling Flowering Time in Brassica Rapa L

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