Source-Sink Relationship and Yield Performance of Hybrid Rice Varieties in Boro Season
[1]
Mahjuba Akter, Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh; Graduate School of Agriculture, Ehime University, Ehime, Japan.
[2]
Shovon C. Sarkar, Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh; State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
[3]
M. R. Islam, Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur, Bangladesh.
[4]
Md. Moinul Haque, Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.
The source-sink relationship and its impact on the yield performance of five hybrid rice varieties (BRRI hybrid dhan3, Heera4, Sonarbangla3, Moyna and Jagoron) was conducted in Boro season and two inbred rice varieties (BRRI dhan28 and BRRI dhan45) were used as test crop. The result showed that all the studied hybrid varieties exhibited superiority in respect of growth characters, yield and yield attributes such as plant height, tillers hill-1, leaf area index, total dry matter hill-1, shoot dry matter at pre-anthesis and maturity period, changes in shoot dry matter, shoot reserve translocation, total spikelets panicle-1, spikelets fertility, weight of 1000 grains, biological yield and harvest index over the inbred. Highest shoot reserve translocation (15.58%), highest ratio of spikelets no. to LA (0.31 cm-2) and yield sink to LA (14.09 mg cm-2) were observed in Heera 4, while the lowest value (9.59%), lowest ratio of spikelets no. to LA (0.22 cm-2) and yield sink to LA (11.09 mg cm-2) were observed in BRRI dhan28. Heera4 (83.19%) accumulated significantly highest percentage of dry matter from current photosynthate in grain, while BRRI dhan45 showed the lowest value (75.79%). Heera 4 provided the highest grain yield (7.80 t ha-1) which was closely followed by Jagoron (7.08 t ha-1). While BRRI dhan28 showed the lowest grain yield (4.23 t ha-1) closely followed by BRRI dhan45 (4.55 t ha-1). Hybrid Heera 4 had the superiority over the test varieties in respect of post heading photosynthetic assimilation per unit leaf area and grain yield.
Source-Sink Relationship, Hybrid Rice, Inbred Rice, Yield Performance, Boro Season
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