Abstract
Taking the orange leaf head Chinese cabbage〔Brassica campestris L.ssp.pekinensis(Lour)Olsson〕self-line(LH)and the white leaf head Chinese cabbage(91-12)self-line as parents,we studied the hereditary feature of cotyledon color of orange leaf head Chinese cabbage and its stability in environment.The result showed that the cotyledon and leaf head of orange leaf head Chinese cabbage and normal leaf head Chinese cabbage,selfing and back-cross F1 and F1',were both yellow.The separation ratio of F2 and BC1F1 cotyledon color were 3:1 and 1:1(yellow:orange),respectively.This indicated that cotyledon color of orange leaf head was controlled by a pair of recessive alleles.And the inheritance of cotyledon color,flower color and leaf head color belongs to pleiotropism.In other words,if the cotyledon of a plant was orange,its leaf head and flower were also orange.Under the conditions of the dark or weak light treatment,seed leaves of orange leaf head Chinese cabbage showed orange after they were exposed in the sun for about 2 hours.Furthermore under the low temperature(0-3 ℃)and dark conditions,orange seed leaves of orange leaf head Chinese cabbage were observed more clearly,which were not affected by change of pregermination time(24 hours or 48 hours).So cotyledon color of orange leaf head Chinese cabbage can be applied as an ideal morphological marker for the breeding of orange head Chinese cabbage.
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Claims 9
Claim · model-written summary
The F2 cotyledon color segregated 3:1 yellow to orange.
- Taxon
- Chinese Cabbage
Brassica rapa subsp. pekinensist0 - Material
- F2e0
- Outcome
- cotyledon colore0
- Value
- 3:1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The separation ratio of F2 and BC1F1 cotyledon color were 3:1 and 1:1(yellow:orange),respectively”
t0“Chinese Cabbage”
Claim · model-written summary
The BC1F1 cotyledon color segregated 1:1 yellow to orange.
- Taxon
- Chinese CabbageBrassica rapa subsp. pekinensist0
- Material
- BC1F1e0
- Outcome
- cotyledon colore0
- Value
- 1:1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The separation ratio of F2 and BC1F1 cotyledon color were 3:1 and 1:1(yellow:orange),respectively”
t0“Chinese Cabbage”
Claim · model-written summary
Orange cotyledon color was inferred to be controlled by recessive alleles.
- Taxon
- Chinese CabbageBrassica rapa subsp. pekinensist0
- Gene
- a pair of recessive allelese0
- Outcome
- cotyledon colore0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotyledon color of orange leaf head was controlled by a pair of recessive alleles”
t0“Chinese Cabbage”
Claim · model-written summary
Cotyledon, flower and leaf head color showed pleiotropic inheritance.
- Taxon
- Chinese CabbageBrassica rapa subsp. pekinensist0
- Outcome
- pleiotropisme0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inheritance of cotyledon color,flower color and leaf head color belongs to pleiotropism”
t0“Chinese Cabbage”
Claim · model-written summary
Orange cotyledons predicted orange flowers and leaf heads.
- Taxon
- Chinese CabbageBrassica rapa subsp. pekinensist0
- Outcome
- its leaf head and flower were also orangee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“if the cotyledon of a plant was orange,its leaf head and flower were also orange”
t0“Chinese Cabbage”
Claim · model-written summary
Following dark or weak light exposure, seed leaves turned orange after about two hours in sun.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensise0
- Treatment
- dark or weak light treatmente0
- Outcome
- seed leaves of orange leaf head Chinese cabbage showed orangee0
- Value
- about 2 hourse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the conditions of the dark or weak light treatment,seed leaves of orange leaf head Chinese cabbage showed orange after they were exposed in the sun for about 2 hours”
Claim · model-written summary
Low temperature and darkness made orange seed leaves more clearly visible.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensise0
- Treatment
- low temperature(0-3 ℃)and dark conditionse0
- Outcome
- orange seed leavese0
- Direction
- more clearlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under the low temperature(0-3 ℃)and dark conditions,orange seed leaves of orange leaf head Chinese cabbage were observed more clearly”
Claim · model-written summary
Changing pregermination time between 24 and 48 hours did not alter orange cotyledon visibility.
- Taxon
- Chinese CabbageBrassica rapa subsp. pekinensist0
- Treatment
- change of pregermination time(24 hours or 48 hours)e0
- Outcome
- orange seed leavese1
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which were not affected by change of pregermination time(24 hours or 48 hours)”
t0“Chinese Cabbage”
e1“orange seed leaves of orange leaf head Chinese cabbage were observed more clearly”
Claim · model-written summary
The authors propose orange cotyledon color as a breeding marker.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensise0
- Outcome
- ideal morphological marker for the breeding of orange head Chinese cabbagee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotyledon color of orange leaf head Chinese cabbage can be applied as an ideal morphological marker for the breeding of orange head Chinese cabbage”