Abstract
sd1-d originating from ‘Dee-geo-woo-gen’ has been utilized to develop short-culmed indica varieties adaptable to higher fertilizer-application. Its tall alleles SD1-in and SD1-ja are harbored in indica and japonica subspecies, respectively. The sd1-d of indica IR36 was substituted with SD1-in or SD1-ja by recurrent backcrossing with IR36, and two tall isogenic lines (“5867-36” and “Koshi-36”) were developed. IR36, 5867-36 and Koshi-36 were grown in a paddy field in three years, and yield and related traits were measured, the effects of SD1-in and SD1-ja on yielding ability and related characteristics were examined on the genetic background of IR 36. SD1-in decreased panicle number per m2 but increased spikelet number per panicle, ripened-grain percentage and 1000-grain weight, compared with sd1-d, resulting in the increase of yield. The increase of 1000-grain weight by SD1-in, caused by the increases of length, width and thickness of grain, was due to the increases of the length and width of lemma. SD1-ja did not significantly affect yield, mainly because the decrease of panicle number per m2 was compensated by the enlarged 1000-grain weight owing to the increase of lemma length. Serious lodging was observed in long-culmed 5867-36, suggesting that sd1-d is indispensable for indica breeding programs.
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Claims 11
Claim · model-written summary
SD1-in reduced panicle number per square metre relative to sd1-d.
- Taxon
- rice
Oryza sativat0 - Gene
- SD1-ine0
- Outcome
- panicle number per m2e0
- Direction
- decreasede0
- Comparator
- sd1-de0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“SD1-in decreased panicle number per m2 but increased spikelet number per panicle, ripened-grain percentage and 1000-grain weight, compared with sd1-d, resulting in the increase of yield.”
Claim · model-written summary
SD1-in increased spikelets per panicle, ripened-grain percentage and thousand-grain weight relative to sd1-d.
- Taxon
- riceOryza sativat0
- Gene
- SD1-ine0
- Outcome
- spikelet number per panicle, ripened-grain percentage and 1000-grain weighte0
- Direction
- increasede0
- Comparator
- sd1-de0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“SD1-in decreased panicle number per m2 but increased spikelet number per panicle, ripened-grain percentage and 1000-grain weight, compared with sd1-d, resulting in the increase of yield.”
Claim · model-written summary
SD1-in increased yield relative to sd1-d.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“SD1-in decreased panicle number per m2 but increased spikelet number per panicle, ripened-grain percentage and 1000-grain weight, compared with sd1-d, resulting in the increase of yield.”
Claim · model-written summary
SD1-in increased grain length, width and thickness.
- Taxon
- riceOryza sativat0
- Gene
- SD1-ine0
- Outcome
- length, width and thickness of graine0
- Direction
- increasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“The increase of 1000-grain weight by SD1-in, caused by the increases of length, width and thickness of grain, was due to the increases of the length and width of lemma.”
Claim · model-written summary
SD1-in increased lemma length and width.
- Taxon
- riceOryza sativat0
- Organ / stage
- lemmae0
- Gene
- SD1-ine0
- Outcome
- length and width of lemmae0
- Direction
- increasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“The increase of 1000-grain weight by SD1-in, caused by the increases of length, width and thickness of grain, was due to the increases of the length and width of lemma.”
Claim · model-written summary
SD1-ja did not significantly affect yield.
- Taxon
- riceOryza sativat0
- Gene
- SD1-jae0
- Outcome
- yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“SD1-ja did not significantly affect yield, mainly because the decrease of panicle number per m2 was compensated by the enlarged 1000-grain weight owing to the increase of lemma length.”
Claim · model-written summary
SD1-ja decreased panicle number per square metre.
- Taxon
- riceOryza sativat0
- Gene
- SD1-jae0
- Outcome
- panicle number per m2e0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“SD1-ja did not significantly affect yield, mainly because the decrease of panicle number per m2 was compensated by the enlarged 1000-grain weight owing to the increase of lemma length.”
Claim · model-written summary
SD1-ja enlarged thousand-grain weight.
- Taxon
- riceOryza sativat0
- Gene
- SD1-jae0
- Outcome
- 1000-grain weighte0
- Direction
- enlargede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“SD1-ja did not significantly affect yield, mainly because the decrease of panicle number per m2 was compensated by the enlarged 1000-grain weight owing to the increase of lemma length.”
Claim · model-written summary
SD1-ja increased lemma length.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“SD1-ja did not significantly affect yield, mainly because the decrease of panicle number per m2 was compensated by the enlarged 1000-grain weight owing to the increase of lemma length.”
Claim · model-written summary
Serious lodging occurred in the long-culmed 5867-36 line.
- Taxon
- riceOryza sativat0
- Material
- 5867-36e0
- Outcome
- Serious lodginge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Serious lodging was observed in long-culmed 5867-36”
Claim · model-written summary
The authors conclude that sd1-d is indispensable for indica breeding programs.
- Taxon
- riceOryza sativat0
- Gene
- sd1-de0
- Outcome
- indispensable for indica breeding programse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“suggesting that sd1-d is indispensable for indica breeding programs.”