Abstract
Abstract The development of new cultivars with improved nitrogen use efficiency (NUE) is key for implementing sustainable agriculture practices. Crop wild relatives (CWRs) provide valuable genetic resources for breeding programs aimed at achieving this goal. In this study, three eggplant (Solanum melongena) accessions together with their advanced backcrosses (ABs; BC3 to BC5 generations) were evaluated for 22 morpho-agronomic, physiological, and NUE traits under low nitrogen (LN) fertilization conditions. The ABs were developed with introgressions from the wild relatives Solanum insanum, Solanum dasyphyllum, and Solanum elaeagnifolium. The AB population comprised a total of 25, 59, and 59 genotypes, respectively, with overall donor wild relative genome coverage percentages of 58.8%, 46.3%, and 99.2%. The three S. melongena recurrent parents were also evaluated under control (normal) N fertilization. Reduction of N fertilization in the parents resulted in decreased chlorophyll content-related traits, aerial biomass, stem diameter, and yield and increased NUE, nitrogen uptake efficiency (NUpE), and nitrogen utilization efficiency (NUtE). However, the decrease in yield was moderate, ranging between 62.6% and 72.6%. A high phenotypic variation was observed within each of the three sets of ABs under LN conditions, with some individuals displaying improved transgressive characteristics over the recurrent parents. Using the single primer enrichment technology 5 k probes platform for high-throughput genotyping, we observed a variable but high degree of recurrent parent genome recovery in the ABs attributable to the lines recombination, allowing the successful identification of 16 quantitative trait loci (QTL). Different allelic effects were observed for the introgressed QTL alleles. Several candidate genes were identified in the QTL regions associated with plant growth, yield, fruit size, and NUE-related parameters. Our results show that eggplant materials with introgressions from CWRs can result in a dramatic impact in eggplant breeding for a more sustainable agriculture.
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Claims 10
Claim · model-written summary
The three backcross populations had wild relative genome coverage of 58.8%, 46.3%, and 99.2%, respectively.
- Taxon
- eggplant
Solanum melongenae1 - Outcome
- donor wild relative genome coverage percentagese0
- Value
- 58.8%, 46.3%, and 99.2%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“overall donor wild relative genome coverage percentages of 58.8%, 46.3%, and 99.2%”
e1“eggplant (Solanum melongena)”
Claim · model-written summary
Low nitrogen reduced chlorophyll content traits in eggplant parents.
- Taxon
- eggplantSolanum melongenae1
- Treatment
- Reduction of N fertilizatione0
- Outcome
- chlorophyll content-related traitse0
- Direction
- decreasede0
- Comparator
- control (normal) N fertilizatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduction of N fertilization in the parents resulted in decreased chlorophyll content-related traits”
e1“eggplant (Solanum melongena)”
e2“control (normal) N fertilization”
Claim · model-written summary
Low nitrogen reduced aerial biomass and stem diameter in eggplant parents.
- Taxon
- eggplantSolanum melongenae1
- Treatment
- Reduction of N fertilizatione0
- Outcome
- aerial biomass, stem diametere0
- Direction
- decreasede0
- Comparator
- control (normal) N fertilizatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduction of N fertilization in the parents resulted in decreased chlorophyll content-related traits, aerial biomass, stem diameter, and yield”
e1“eggplant (Solanum melongena)”
e2“control (normal) N fertilization”
Claim · model-written summary
Low nitrogen reduced eggplant parent yield by a moderate 62.6% to 72.6%.
- Taxon
- eggplantSolanum melongenae2
- Treatment
- Reduction of N fertilizatione0
- Outcome
- yielde0
- Direction
- decreasede0
- Value
- 62.6% and 72.6%e1
- Comparator
- control (normal) N fertilizatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduction of N fertilization in the parents resulted in decreased chlorophyll content-related traits, aerial biomass, stem diameter, and yield”
e1“decrease in yield was moderate, ranging between 62.6% and 72.6%”
e2“eggplant (Solanum melongena)”
e3“control (normal) N fertilization”
Claim · model-written summary
Low nitrogen increased nitrogen use efficiency, uptake efficiency and utilization efficiency in eggplant parents.
- Taxon
- eggplantSolanum melongenae2
- Treatment
- Reduction of N fertilizatione1
- Outcome
- NUE, nitrogen uptake efficiency (NUpE), and nitrogen utilization efficiency (NUtE)e0
- Direction
- increasede0
- Comparator
- control (normal) N fertilizatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased NUE, nitrogen uptake efficiency (NUpE), and nitrogen utilization efficiency (NUtE)”
e1“Reduction of N fertilization in the parents”
e2“eggplant (Solanum melongena)”
e3“control (normal) N fertilization”
Claim · model-written summary
Each backcross set had high phenotypic variation under low nitrogen, with some transgressive individuals.
- Taxon
- eggplantSolanum melongenae1
- Outcome
- high phenotypic variatione0
- Comparator
- recurrent parentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high phenotypic variation was observed within each of the three sets of ABs under LN conditions, with some individuals displaying improved transgressive characteristics over the recurrent parents”
e1“eggplant (Solanum melongena)”
Claim · model-written summary
Recurrent parent genome recovery in the backcrosses was variable but high.
- Taxon
- eggplantSolanum melongenae1
- Outcome
- recurrent parent genome recoverye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variable but high degree of recurrent parent genome recovery in the ABs”
e1“eggplant (Solanum melongena)”
Claim · model-written summary
Genotyping identified 16 quantitative trait loci.
- Taxon
- eggplantSolanum melongenae1
- Outcome
- quantitative trait loci (QTL)e0
- Value
- 16 quantitative trait locie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“allowing the successful identification of 16 quantitative trait loci (QTL)”
e1“eggplant (Solanum melongena)”
Claim · model-written summary
Introgressed QTL alleles showed different allelic effects.
- Taxon
- eggplantSolanum melongenae1
- Gene
- introgressed QTL allelese0
- Outcome
- Different allelic effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Different allelic effects were observed for the introgressed QTL alleles”
e1“eggplant (Solanum melongena)”
Claim · model-written summary
Candidate genes were found in QTL regions associated with growth, yield, fruit size and nitrogen efficiency.
- Taxon
- eggplantSolanum melongenae1
- Gene
- candidate genese0
- Outcome
- Several candidate genes were identifiede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Several candidate genes were identified in the QTL regions associated with plant growth, yield, fruit size, and NUE-related parameters”
e1“eggplant (Solanum melongena)”
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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.