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Screening of Advanced Aromatic Rice Lines Using Morphological and Physico-chemical Characteristics

S Paul
Ex-MS Student
BARI, RARS, Jashore, Bangladesh

PK Biswas
Professor
Dept. of Agronomy, SAU, Bangladesh

MS Islam
Professor
Dept. of Agronomy, SAU, Bangladesh

SS Siddique
Scientist
BARI, RARS, Jashore, Bangladesh

BJ Shirazy
Scientist
BARI, RARS, Jashore, Bangladesh

MS Kobir
Scientist
BARI, RARS, Jashore, Bangladesh

Abstract/ Executive Summary:

Short-statured and lodging resistant rice plants with long to medium slender grain are the expected criteria for aromatic rice. However, most of the aromatic rice varieties in Bangladesh do not meet the expected criteria. Therefore, this study was undertaken to detect short-statured rice plants with aromatic and long to medium slender grain where twelve advanced rice lines (derived from the local rice germplasm) with a local check Kataribhog were evaluated. All the genotypes demonstrated significant variation for different parameters such as plant height at harvest, yield per hectare, grain length, grain size, grain shape, and aroma. At harvest, the shortest plant height was obtained from SAU ADL11 (107.09cm), and it was statistically similar to SAU ADL4 (111.68cm) and SAU ADL5 (111.89cm). However, the plant height of check variety Kataribhog was 167.17cm. The highest grain yield per hectare was found in SAU ADL5 (4.79 tha^-1), where it was 2.71 tha^-1 in Kataribhog. Besides, the grain yield of shorter genotypes SAU ADL4 and SAU ADL11 was 3.47 t ha^-1 and 3.84 t ha^-1 , respectively. The SAU ADL1 provided the highest kernel length (7.31mm), and the lowest kernel length (4.87 mm) was recorded in the check. Kernel length of short-statured genotypes ranged from 7.01 mm to 6.57 mm. Kernel size of all evaluated genotypes was long to medium; whereas, it was short for Kataribhog. Kernel shape of these short-statured genotypes was slender to medium. In case of aroma, SAU ADL3, SAU ADL5, SAU ADL7, SAU ADL9, SAU ADL10, and SAU ADL11 were moderately aromatic, and other genotypes were non-aromatic. However, Kataribhog was strongly aromatic. Finally, SAU ADL5 and SAU ADL11 were evaluated as important germplasms in respect of different characters such as shortstatured plant, long to medium slender grain, and aroma. These two lines could be potential inbreed aromatic rice genotypes for Bangladesh.

Keywords: Aromatic rice, Germplasm, Physico-chemical characteristics, Kataribhog

Location: Department of Agronomy of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka- 1207.

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Rice

Objectives:

This study, twelve advanced lines (derived from the local rice germplasm of Bangladesh) were evaluated to find out short-statured, quality grain aromatic rice.

Methodology:

Seeds of local aromatic Aman rice (grown in July to December) genotypes were preserved in the Department of Agronomy of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka- 1207. Then, twelve advanced lines were selected from the local genotypes through various field observations by the Department of Agronomy of Sher-e-Bangla Agricultural University. The selected advance lines were named as SAU ADL (Sher-e-Bangla Agricultural University Agronomy Department Line) having chronological numerical as (i) SAU ADL1, (ii) SAU ADL2, (iii) SAU ADL3, (iv) SAU ADL4, (v) SAU ADL5, (vi) SAU ADL6, (vii) SAU ADL7, (viii) SAU ADL8, (ix) SAU ADL9, (x) SAU ADL10, (xi) SAU ADL11 and (xii) SAU ADL12. Kataribhog was collected from Bangladesh Rice Research Institute, Gazipur, Bangladesh and used as the check variety throughout the entire evaluation process. The experiment was laid out in Randomized Completely Block Design (RCBD) with three replications and there were thirteen rice genotypes as treatment. Sprouted Seeds were sown in seedbed on and transplanted on the main field. The plot size was 6 m², with spacing 25 cm x 15 cm; 8 rows plot^-1, 20 hills row^-1, and one seedling hill^-1. The experimental area was fertilized with 120, 80, 80 and 20 kg ha^-1 of N, P₂O₅, K₂O and S applied in the form of urea, triple super phosphate (TSP), muriate of potash (MoP) and gypsum respectively. The entire amounts of TSP, MP, and gypsum were applied as basal dose at final land preparation. The urea was top-dressed in three equal installments. All the plots were irrigated depending on rainfall to maintain the flood condition. All the plots were dried 7 days before harvesting. The crop was considered mature after 80 percent grain became yellow color. Harvesting was started manually at 106 days and continued up to 138 days according to the maturity of the individual lines. Ten hills were selected randomly per plot for evaluation of different growth parameters such as plant height (cm) at harvest, the number of tillers hill^-1 at harvest, effective tillers hill^-1, panicle length (basal node of the rachis to apex), total grains panicle^-1, thousand grain weight (g). To determine the fertile spikelet per panicle (%), 10 panicles were harvested at maturity from five randomly chosen plants in each of the plot. The number of filled, unfilled and total grain was also counted to compute fertile spikelet percentage panicle^-1 as Kumar (2016). Fertile spikelet panicle^-1(%) = No.of filled grains in the panicle/Total no.of grains in the panicle x 100. All the data were analyzed using the R program for statistical analysis. The means were separated using the least significant difference (LSD) test at the 0.05 level.

Source of Information: Bangladesh Agron. J. 2019, 22(2): 91-102

Article Link (Online Journal): DOI: https://doi.org/10.3329/baj.v22i2.47624

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The short-statured lodging resistant aromatic rice genotypes SAU ADL5 and SAU ADL11 along with the quality grain and higher yield can be evaluated at different Agro-ecological zone of Bangladesh to promote as improved genotypes for cultivation. Other genotypes could be preserved as improved breeding materials.

Knowledge Management: Journal