Abstract
To screen high yield rice varieties or hybrids with good tolerance to low temperature at flowering stage,the ecological adaptability of 12 late maturing,high yield rice hybird and varieties(line) with similar growth duration had been evaluated at flowering stage by 3 times of sowing under natural conditions.Under low temperature stress at flowering stage,relative damage degree values of major agronomic traits were as following order.grains per panicle,yield per plant,seed setting rate,spikelets per panicle,plant height,panicle length,1000 seed weight;and relative cold damage percent (RDP) of yield per plant was very significantly positive correlated with RDP of grains per panicle,RDP of seed setting rate,score for color of flag leaf,score for delayed time of heading period.Cold tolerance differs distinctly in rice genotypes at flowering stage.The morphological indexes,e g.RDP of grain setting rate and grains per panicle,color of flag leaf,delayed time of heading period,bract panicle rate had been used to evaluate tolerance to low temperature at flowering stage.95LR102,a line derived from the cross of an indica variety and a japonica variety,has strong tolerance to chilling injury.Some hybrids,e g,V644,V46,which have been popularly planting as late rice in Hunan,have better adaptability.
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Claims 6
Claim · model-written summary
Low temperature stress at flowering stage gave relative damage degree values of major agronomic traits in the order grains per panicle, yield per plant, seed setting rate, spikelets per panicle, plant height, panicle length, 1000 seed weight
- Taxon
- rice
Oryza sativae0 - Organ / stage
- flowering stagee0
- Treatment
- low temperature stress at flowering stagee1
- Outcome
- relative damage degree values of major agronomic traitse1
- Direction
- were as following ordere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ecological adaptability of 12 late maturing,high yield rice hybird and varieties(line) with similar growth duration had been evaluated at flowering stage by 3 times of sowing under natural conditions”
e1“Under low temperature stress at flowering stage,relative damage degree values of major agronomic traits were as following order.grains per panicle,yield per plant,seed setting rate,spikelets per panicle,plant height,panicle length,1000 seed weight”
Claim · model-written summary
Relative cold damage percent of yield per plant was very significantly positively correlated with relative cold damage of grains per panicle, seed setting rate, flag leaf colour score and delayed heading score in rice under natural conditions
- Taxon
- riceOryza sativae0
- Outcome
- relative cold damage percent (RDP) of yield per plante2
- Direction
- very significantly positive correlatede2
- Setting
- natural conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ecological adaptability of 12 late maturing,high yield rice hybird and varieties(line) with similar growth duration had been evaluated at flowering stage by 3 times of sowing under natural conditions”
e2“relative cold damage percent (RDP) of yield per plant was very significantly positive correlated with RDP of grains per panicle,RDP of seed setting rate,score for color of flag leaf,score for delayed time of heading period”
Claim · model-written summary
Cold tolerance differs distinctly among rice genotypes at flowering stage
- Taxon
- riceOryza sativae3
- Material
- rice genotypese3
- Organ / stage
- flowering stagee3
- Outcome
- Cold tolerancee3
- Direction
- differs distinctlye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Cold tolerance differs distinctly in rice genotypes at flowering stage”
Claim · model-written summary
Morphological indexes such as RDP of grain setting rate and grains per panicle, flag leaf colour, delayed heading and bract panicle rate were used to evaluate low temperature tolerance of rice at flowering stage
- Taxon
- riceOryza sativae0
- Organ / stage
- flowering stagee4
- Outcome
- tolerance to low temperaturee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ecological adaptability of 12 late maturing,high yield rice hybird and varieties(line) with similar growth duration had been evaluated at flowering stage by 3 times of sowing under natural conditions”
e4“The morphological indexes,e g.RDP of grain setting rate and grains per panicle,color of flag leaf,delayed time of heading period,bract panicle rate had been used to evaluate tolerance to low temperature at flowering stage”
Claim · model-written summary
Line 95LR102, derived from an indica by japonica cross, has strong tolerance to chilling injury in rice
- Taxon
- riceOryza sativae0
- Material
- 95LR102e5
- Outcome
- tolerance to chilling injurye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ecological adaptability of 12 late maturing,high yield rice hybird and varieties(line) with similar growth duration had been evaluated at flowering stage by 3 times of sowing under natural conditions”
e5“95LR102,a line derived from the cross of an indica variety and a japonica variety,has strong tolerance to chilling injury”
Claim · model-written summary
Hybrids V644 and V46, planted as late rice in Hunan, have better adaptability
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Some hybrids,e g,V644,V46,which have been popularly planting as late rice in Hunan,have better adaptability”
The same questions in other papers
stage · pest · Oryza sativa (rice)Positive and negative results
1 in the opposite direction
- positive
cold · pest · Oryza sativa (rice)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 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.