Abstract
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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Claims 7
Claim · model-written summary
A 16 h photoperiod increased dry matter, sugars, vitamin C and anthocyanins.
- Taxon
- Brassica rapa L.
Brassica rapat0 - Treatment
- 16 h photoperiode0
- Outcome
- content of dry matter, sugars, vitamin C, and anthocyaninse0
- Direction
- increasede0
- Comparator
- 12 h photoperiode1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growing under conditions of a 16 h photoperiod increased the content of dry matter, sugars, vitamin C, and anthocyanins”
t0“Brassica rapa L.”
e1“the content of photosynthetic pigments was higher under the conditions of a 12 h photoperiod”
Claim · model-written summary
Photosynthetic pigment content was higher under a 12 h photoperiod.
- Taxon
- Brassica rapa L.Brassica rapat0
- Treatment
- 12 h photoperiode0
- Outcome
- content of photosynthetic pigmentse0
- Direction
- highere0
- Comparator
- 16 h photoperiode1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the content of photosynthetic pigments was higher under the conditions of a 12 h photoperiod”
t0“Brassica rapa L.”
e1“growing under conditions of a 16 h photoperiod increased the content of dry matter, sugars, vitamin C, and anthocyanins”
Claim · model-written summary
Valuable lines were identified as sources of bioactive compounds.
- Taxon
- Brassica rapa L.Brassica rapat0
- Outcome
- sources of biologically active compoundse0
- Value
- Valuable linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Valuable lines that can be sources of biologically active compounds were revealed”
t0“Brassica rapa L.”
Claim · model-written summary
The study mapped 102 QTLs for biochemical quality traits under short and long daylight.
- Taxon
- B. rapaBrassica rapae0
- Material
- doubled haploid linese0
- Outcome
- biochemical quality traitse0
- Value
- 102 QTLse0
- Qualifier
- short and long daylight hourse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
Claim · model-written summary
Molecular markers linked to the selected QTLs were determined.
- Taxon
- Brassica rapa L.Brassica rapat0
- Outcome
- Molecular markers genetically linked to the selected QTLse0
- Value
- Molecular markerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Molecular markers genetically linked to the selected QTLs were determined”
t0“Brassica rapa L.”
Claim · model-written summary
Loci controlling the studied biochemical traits were mainly in linkage groups five, six, seven and nine.
- Taxon
- Brassica rapa L.Brassica rapat0
- Outcome
- identified loci controlling all the studied biochemical traitse0
- Value
- fifth, sixth, seventh, and ninth linkage groupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“identified loci controlling all the studied biochemical traits were mainly in the fifth, sixth, seventh, and ninth linkage groups”
t0“Brassica rapa L.”
Claim · model-written summary
Most identified loci controlled several studied traits at once.
- Taxon
- Brassica rapa L.Brassica rapat0
- Outcome
- identified loci controlled several studied traits simultaneouslye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most of the identified loci controlled several studied traits simultaneously”
t0“Brassica rapa L.”
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- negative
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- negative
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See all 19 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.