Abstract
Abstract Oilseed rape ( Brassica napus L.) is sensitive to heat stress during the reproductive stage, but it is not clear whether the male and female reproductive organs differ in their sensitivity to heat stress. In this study, full diallel crossing experiments were conducted among four genotypes of B. napus under control, moderate and high heat stress conditions for five days immediately before and two days after crossing. General combining ability (GCA), specific combining ability (SCA) and reciprocal effects were analyzed to evaluate the genetic basis of heat stress tolerance in male and female reproductive organs. High female temperature (Tf) and high male temperature (Tm) reduced the number of fertile pods and seeds set per floret, and the significant Tf × Tm interaction indicated that female reproductive organs were more sensitive to heat stress than male reproductive organs. There were no overall GCA, SCA or reciprocal effects across all combinations of Tf and Tm. However, a significant reciprocal × Tf effect was found, suggesting that genotypes differed in their ability to set fertile pods and seeds as Tf increased. The relative heat tolerance of G1 as a female increased as Tf increased, and the relative heat tolerance of G2 as a male decreased as Tf increased. In summary, reciprocal diallel crossing has demonstrated that female reproductive organs of B. napus are more sensitive than male to transient heat stress at the early flowering stage, and genotypes differ in relative heat tolerance in the male and female reproductive organs as Tf increases.
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Claims 7
Claim · model-written summary
High female temperature reduced fertile pods and seeds per floret.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- High female temperaturee0
- Outcome
- number of fertile pods and seeds set per florete0
- Direction
- reducede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“High female temperature (Tf) and high male temperature (Tm) reduced the number of fertile pods and seeds set per floret”
e1“under control, moderate and high heat stress conditions”
t0“Brassica napus”
Claim · model-written summary
High male temperature reduced fertile pods and seeds per floret.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- high male temperaturee0
- Outcome
- number of fertile pods and seeds set per florete0
- Direction
- reducede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High female temperature (Tf) and high male temperature (Tm) reduced the number of fertile pods and seeds set per floret”
e1“under control, moderate and high heat stress conditions”
t0“Brassica napus”
Claim · model-written summary
A significant female by male temperature interaction indicated greater heat sensitivity of female reproductive organs.
- Taxon
- Brassica napusBrassica napust0
- Organ / stage
- female reproductive organse0
- Outcome
- female reproductive organs were more sensitive to heat stresse0
- Direction
- more sensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the significant Tf × Tm interaction indicated that female reproductive organs were more sensitive to heat stress than male reproductive organs”
t0“Brassica napus”
Claim · model-written summary
No overall GCA, SCA or reciprocal effects occurred across female and male temperature combinations.
- Taxon
- Brassica napusBrassica napust0
- Outcome
- GCA, SCA or reciprocal effectse0
- Direction
- no overalle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no overall GCA, SCA or reciprocal effects across all combinations of Tf and Tm”
t0“Brassica napus”
Claim · model-written summary
A significant reciprocal by female temperature effect suggested genotypic differences in fertile pod and seed set as female temperature rose.
- Taxon
- Brassica napusBrassica napust0
- Material
- genotypese0
- Outcome
- ability to set fertile pods and seedse0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant reciprocal × Tf effect was found, suggesting that genotypes differed in their ability to set fertile pods and seeds as Tf increased”
t0“Brassica napus”
Claim · model-written summary
Relative heat tolerance of G1 as a female increased with female temperature.
- Taxon
- Brassica napusBrassica napust0
- Material
- G1e0
- Organ / stage
- femalee0
- Outcome
- relative heat tolerancee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative heat tolerance of G1 as a female increased as Tf increased”
t0“Brassica napus”
Claim · model-written summary
Relative heat tolerance of G2 as a male decreased with female temperature.
- Taxon
- Brassica napusBrassica napust0
- Material
- G2e0
- Organ / stage
- malee0
- Outcome
- relative heat tolerancee0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the relative heat tolerance of G2 as a male decreased as Tf increased”
t0“Brassica napus”
The same questions in other papers
maleate(2-) · yield · Brassica napus (oilseed rape)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
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.