Abstract
ABSTRACT The productivity and quality of grain crops in semiarid environments is often affected by drought, which is likely to accentuate due to predicted climate changes. Wild pea ( Pisum fulvum Sibth. & Smith) accessions are known to harbour useful allelic diversity for drought responses. The objectives of this study were: (a) assessment of the crossability relations between wild P. fulvum accessions and domesticated peas ( Pisum sativum and Pisum abyssinicum ) and (b) exploring the potential to enhance pea drought resistance with wild allelic variation. Interspecific crosses were made with domesticated cultivars as females and wild P. fulvum accessions as pollen donors. Interspecific hybrids were obtained with similar success rates in both combinations ( P. sativum × fulvum and P. abyssinicum × fulvum ). The genetic background of both the domesticated cultivars and the P. fulvum accessions affected the viability of the resulting F 1 hybrids as well as their capacity to produce normal F 2 seeds. Differential success rate among the studied P. fulvum accessions suggests the existence of more than one chromosomal linear order within the P. fulvum gene pool. Interspecific F 1 hybrids with P. abyssinicum showed higher values of pollen stainability (an indicator of genetic compatibility) than hybrids involving P. sativum , but the studied F 2 population exhibited an opposite trend, suggesting higher scopes for wild P. fulvum introgression into P. sativum . While the agronomic performance of interspecific F 3 and BC 1 F 2 ( P. sativum × fulvum ) progenies under well‐watered (control) conditions was similar to the domestic parent cv. Cameor, under water‐limited (drought) conditions, some introgression derivatives showed three times greater productivity (total dry matter and grain yield) and significantly greater stability across water treatments, confirming the potential to introgress drought‐adaptive alleles from P. fulvum into domesticated pea. The study refutes past hypotheses regarding the role of P. fulvum in the ancestry of P. abyssinicum and demonstrates the crossability potential between P. fulvum and the domesticated peas providing a proof of concept for the potential to introgress drought‐adaptive alleles from P. fulvum into the domesticated pea gene pool.
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Claims 11
Claim · model-written summary
Interspecific hybrids formed with similar success in both domesticated pea cross combinations.
- Taxon
- P. sativum
Lathyrus oleraceuse0 - Outcome
- similar success ratese0
- Comparator
- P. abyssinicum × fulvume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interspecific hybrids were obtained with similar success rates in both combinations ( P. sativum × fulvum and P. abyssinicum × fulvum )”
Claim · model-written summary
Genetic backgrounds of domesticated and wild parents affected F 1 hybrid viability.
- Taxon
- P. fulvum
Lathyrus fulvuse0 - Material
- domesticated cultivarse0
- Outcome
- viability of the resulting F 1 hybridse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The genetic background of both the domesticated cultivars and the P. fulvum accessions affected the viability of the resulting F 1 hybrids”
Claim · model-written summary
Genetic backgrounds of parents affected capacity to produce normal F 2 seeds.
- Taxon
- P. fulvumLathyrus fulvuse0
- Material
- domesticated cultivarse0
- Outcome
- capacity to produce normal F 2 seedse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The genetic background of both the domesticated cultivars and the P. fulvum accessions affected the viability of the resulting F 1 hybrids as well as their capacity to produce normal F 2 seeds”
Claim · model-written summary
Cross success varied among P. fulvum accessions, suggesting multiple chromosomal orders.
- Taxon
- P. fulvumLathyrus fulvuse0
- Material
- accessionse0
- Outcome
- Differential success ratee0
- Qualifier
- more than one chromosomal linear ordere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differential success rate among the studied P. fulvum accessions suggests the existence of more than one chromosomal linear order within the P. fulvum gene pool”
Claim · model-written summary
F 1 hybrids with P. abyssinicum had higher pollen stainability than those with P. sativum.
- Taxon
- P. abyssinicum[Pisum sativum] subsp. abyssinicume0
- Organ / stage
- pollene0
- Outcome
- pollen stainabilitye0
- Direction
- highere0
- Comparator
- P. sativume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interspecific F 1 hybrids with P. abyssinicum showed higher values of pollen stainability (an indicator of genetic compatibility) than hybrids involving P. sativum”
Claim · model-written summary
The F 2 population showed the opposite pollen-stainability trend.
- Taxon
- P. sativumLathyrus oleraceuse1
- Outcome
- opposite trende0
- Direction
- oppositee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but the studied F 2 population exhibited an opposite trend”
e1“Interspecific F 1 hybrids with P. abyssinicum showed higher values of pollen stainability (an indicator of genetic compatibility) than hybrids involving P. sativum”
Claim · model-written summary
Under well-watered conditions, interspecific progeny had agronomic performance similar to Cameor.
- Taxon
- P. sativumLathyrus oleraceuse0
- Material
- F 3 and BC 1 F 2e0
- Outcome
- agronomic performancee0
- Direction
- similare0
- Comparator
- cv. Cameore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“agronomic performance of interspecific F 3 and BC 1 F 2 ( P. sativum × fulvum ) progenies under well‐watered (control) conditions was similar to the domestic parent cv. Cameor”
Claim · model-written summary
Some introgression derivatives produced three times greater total dry matter under drought.
- Taxon
- P. sativumLathyrus oleraceuse1
- Material
- introgression derivativese0
- Outcome
- total dry mattere0
- Direction
- greatere0
- Value
- three timese0
- Qualifier
- water‐limited (drought) conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under water‐limited (drought) conditions, some introgression derivatives showed three times greater productivity (total dry matter and grain yield)”
e1“( P. sativum × fulvum ) progenies”
Claim · model-written summary
Some introgression derivatives produced three times greater grain yield under drought.
- Taxon
- P. sativumLathyrus oleraceuse1
- Material
- introgression derivativese0
- Outcome
- grain yielde0
- Direction
- greatere0
- Value
- three timese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under water‐limited (drought) conditions, some introgression derivatives showed three times greater productivity (total dry matter and grain yield)”
e1“( P. sativum × fulvum ) progenies”
Claim · model-written summary
Some introgression derivatives had significantly greater stability across water treatments.
- Taxon
- P. sativumLathyrus oleraceuse1
- Material
- introgression derivativese0
- Outcome
- stability across water treatmentse0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some introgression derivatives showed three times greater productivity (total dry matter and grain yield) and significantly greater stability across water treatments”
e1“( P. sativum × fulvum ) progenies”
Claim · model-written summary
The study refutes the proposed ancestry role of P. fulvum in P. abyssinicum.
- Taxon
- P. abyssinicum[Pisum sativum] subsp. abyssinicume0
- Outcome
- role of P. fulvum in the ancestry of P. abyssinicume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The study refutes past hypotheses regarding the role of P. fulvum in the ancestry of P. abyssinicum”