Abstract
The large seeded sorghum line KS115, despite its low kernel number, provides a promising source for increased grain yield of elite sorghum germplasm, as it has a long kernel filling duration (KFD). The aim of this research was to determine whether the promising grain yield of KS115-derived germplasm was associated with a longer KFD or a kernel growth rate greater than expected for the reduced kernel number. A hybrid of KS115 (ATx642/KS115) and a normal-seeded hybrid (ATx642/RQL36) were grown in two field experiments at Gatton, Queensland. Panicles were sampled regularly to measure kernel volume, water content and dry mass during the kernel filling period. Results showed that the hybrid based on KS115 produced significantly larger kernels and out-yielded the normal-seeded hybrid ATx642/RQL36 in both experiments. High kernel mass of the large-seeded hybrid was associated with both an extended duration of kernel filling and a higher rate of dry mass accumulation. As the higher rate of kernel filling merely compensated for a reduced kernel number, prolonged kernel filling duration, rather than the high filling rate of individual kernels, is a major cause for the promising grain yield of the large-seeded hybrid.
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Claims 6
Claim · model-written summary
The KS115 hybrid produced significantly larger kernels than the normal-seeded hybrid.
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum”
e0“the hybrid based on KS115 produced significantly larger kernels”
e1“a normal-seeded hybrid (ATx642/RQL36)”
Claim · model-written summary
The KS115 hybrid outyielded ATx642/RQL36 in both experiments.
- Material
- KS115e0
- Outcome
- out-yieldede0
- Direction
- out-yieldede0
- Qualifier
- both experimentse0
- Comparator
- ATx642/RQL36e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum”
e0“the hybrid based on KS115 produced significantly larger kernels and out-yielded the normal-seeded hybrid ATx642/RQL36 in both experiments”
Claim · model-written summary
High kernel mass was associated with longer kernel filling duration.
- Organ / stage
- kernele0
- Outcome
- kernel masse0
- Direction
- Highe0
- Qualifier
- extended duration of kernel fillinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum”
e0“High kernel mass of the large-seeded hybrid was associated with both an extended duration of kernel filling”
Claim · model-written summary
High kernel mass was associated with a higher dry-mass accumulation rate.
- Organ / stage
- kernele0
- Outcome
- kernel masse0
- Direction
- Highe0
- Qualifier
- higher rate of dry mass accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum”
e0“High kernel mass of the large-seeded hybrid was associated with both an extended duration of kernel filling and a higher rate of dry mass accumulation”
Claim · model-written summary
Higher kernel filling rate compensated for reduced kernel number.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum”
e0“the higher rate of kernel filling merely compensated for a reduced kernel number”
Claim · model-written summary
Prolonged kernel filling duration was identified as a major cause of the large-seeded hybrid’s promising yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum”
e0“prolonged kernel filling duration, rather than the high filling rate of individual kernels, is a major cause for the promising grain yield of the large-seeded hybrid”