Abstract
Greenhouse experiments were conducted at the International Rice Research Institute during the 1989 dry season to investigate varietal differences in morpho-anatomical characters affecting spikelet filling in different tiller orders. There were varietal differences in tiller initiation and heading dates, and tiller duration. The main culm bad competitive advantage over the other tillers. The maximum contribution to filled spikelet weight was made by primary tillers in low tillering cultivars and by secondary tillers in high tillering cultivars. The reduction in inner vascular bundle (IVB) by tiller orders and the namber of IVB and outer vascular bundles (OVB) varied amop.g cultivars. The number of IVB in the peduncle of IR30, Rewa and Hybrid was more than OVB but in IR47705, Silewah, Unbongbyeo and SR14453, OVB was more than IVB. Early formed tillers produced more IVB than the late formed tillers. The number of IVB was positively correlated with number of spikelet and filled spikelet weight, however percent of filled spikelet did not show significant differences as well as 1000 spikelet weight in all types of cultivars.
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Claims 11
Claim · model-written summary
Cultivars differed in tiller initiation, heading dates, and tiller duration.
Verbatim
e0“There were varietal differences in tiller initiation and heading dates, and tiller duration.”
t0“Rcie”
Claim · model-written summary
The main culm had a competitive advantage over other tillers.
Verbatim
e0“The main culm bad competitive advantage over the other tillers.”
t0“Rcie”
Claim · model-written summary
Primary tillers contributed most to filled spikelet weight in low tillering cultivars.
Verbatim
e0“The maximum contribution to filled spikelet weight was made by primary tillers in low tillering cultivars”
t0“Rcie”
Claim · model-written summary
Secondary tillers contributed most to filled spikelet weight in high tillering cultivars.
Verbatim
e0“by secondary tillers in high tillering cultivars.”
t0“Rcie”
Claim · model-written summary
Vascular bundle measures varied with tiller order and cultivar.
Verbatim
e0“The reduction in inner vascular bundle (IVB) by tiller orders and the namber of IVB and outer vascular bundles (OVB) varied amop.g cultivars.”
t0“Rcie”
Claim · model-written summary
IR30, Rewa, and Hybrid had more inner than outer vascular bundles in the peduncle.
Verbatim
e0“The number of IVB in the peduncle of IR30, Rewa and Hybrid was more than OVB”
t0“Rcie”
Claim · model-written summary
IR47705, Silewah, Unbongbyeo, and SR14453 had more outer than inner vascular bundles.
Verbatim
e0“in IR47705, Silewah, Unbongbyeo and SR14453, OVB was more than IVB.”
t0“Rcie”
Claim · model-written summary
Early formed tillers produced more inner vascular bundles than late formed tillers.
Verbatim
e0“Early formed tillers produced more IVB than the late formed tillers.”
t0“Rcie”
Claim · model-written summary
Inner vascular bundle number correlated positively with spikelet number and filled spikelet weight.
Verbatim
e0“The number of IVB was positively correlated with number of spikelet and filled spikelet weight”
t0“Rcie”
Claim · model-written summary
Percent filled spikelets did not differ significantly among cultivar types.
Verbatim
e0“percent of filled spikelet did not show significant differences as well as 1000 spikelet weight in all types of cultivars.”
t0“Rcie”
Claim · model-written summary
Thousand spikelet weight did not differ significantly among cultivar types.
Verbatim
e0“percent of filled spikelet did not show significant differences as well as 1000 spikelet weight in all types of cultivars.”
t0“Rcie”