Abstract
Gamma irradiation mutagenesis is a technique commonly used to induce seedlessness in citrus fruits. We compared fruit quality traits of eight different seeded mandarin varieties within the Israeli citrus breeding collection with those of their corresponding gamma-irradiated low-seeded mutants. The mandarin varieties compared were: “Rishon” with “Kedem”; “Michal” with irradiated “Michal”; “Merav” with “Meravit”; “Vered” with “Vardit”; “Ora” with “Or”; “Murcott” with “Mor”; “Shani” with irradiated “Shani”; “King” with irradiated “King”. Mutational breeding by gamma irradiation reduced average fruit seed number by 70% - 92%. Furthermore, mutational breeding by gamma irradiation delayed ripening of the early-season mandarin varieties “Rishon” and “Michal” by 8 - 13 days, but did not delay ripening of most mid- and late-season varieties. Gamma-irradia- tion mutagenesis also reduced fruit weight of seven of the eight tested low-seeded varieties by 6 - 41 g per fruit. Gamma-irradiation mutagenesis had variable effects on biochemical composition and nutritional quality, in that some irradiated clones presented no changes whereas other had either higher or lower levels of juice total soluble solids, acidity, vitamin C and total antioxidant activity. Finally, sensory evaluations by a trained panel revealed that the flavor of most of the low-seeded, gamma-irradiated varieties was slightly or significantly preferable to that of unirradiated varieties.
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Claims 6
Claim · model-written summary
Irradiation reduced average seed number by 70% to 92%.
- Taxon
- mandarine1
- Treatment
- gamma irradiatione0
- Outcome
- average fruit seed numbere0
- Direction
- reducede0
- Value
- 70% - 92%e0
Not reportedComparator
Verbatim
e0“Mutational breeding by gamma irradiation reduced average fruit seed number by 70% - 92%.”
e1“eight different seeded mandarin varieties”
Claim · model-written summary
Irradiation delayed ripening of early-season Rishon and Michal by 8 to 13 days.
- Taxon
- mandarine0
- Material
- “Rishon” and “Michal”e0
- Treatment
- gamma irradiatione0
- Outcome
- ripeninge0
- Direction
- delayede0
- Value
- 8 - 13 dayse0
Not reportedComparator
Verbatim
e0“mutational breeding by gamma irradiation delayed ripening of the early-season mandarin varieties “Rishon” and “Michal” by 8 - 13 days”
Claim · model-written summary
Irradiation did not delay ripening of most mid- and late-season varieties.
- Taxon
- Mandarint0
- Material
- mid- and late-season varietiese0
- Treatment
- gamma irradiatione1
- Outcome
- ripeninge0
- Direction
- did not delaye0
Not reportedComparator
Verbatim
e0“but did not delay ripening of most mid- and late-season varieties.”
t0“Mandarin Fruit”
e1“mutational breeding by gamma irradiation”
Claim · model-written summary
Irradiation reduced fruit weight in seven of eight low-seeded varieties by 6 to 41 g per fruit.
- Taxon
- Mandarint0
- Treatment
- Gamma-irradia- tion mutagenesise0
- Outcome
- fruit weighte0
- Direction
- reducede0
- Value
- 6 - 41 g per fruite0
Not reportedComparator
Verbatim
e0“Gamma-irradia- tion mutagenesis also reduced fruit weight of seven of the eight tested low-seeded varieties by 6 - 41 g per fruit.”
t0“Mandarin Fruit”
Claim · model-written summary
Biochemical quality measures varied among irradiated clones, with no change, higher or lower levels.
- Taxon
- Mandarint0
- Treatment
- irradiated clonese0
- Outcome
- juice total soluble solids, acidity, vitamin C and total antioxidant activitye0
Not reportedComparatorDirection
Verbatim
e0“some irradiated clones presented no changes whereas other had either higher or lower levels of juice total soluble solids, acidity, vitamin C and total antioxidant activity.”
t0“Mandarin Fruit”
Claim · model-written summary
Panelists preferred flavor of most low-seeded irradiated varieties.
Verbatim
e0“the flavor of most of the low-seeded, gamma-irradiated varieties was slightly or significantly preferable to that of unirradiated varieties.”
t0“Mandarin Fruit”
The same questions in other papers
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- positive
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- positive
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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.