EVALUATION OF GROWTH AND YIELD OF HYBRID AND INBRED RICE VARIETIES CROWN IN BORO SEASON

Abstract

A field experiment was concluded at the Agronomy held of Sher-e-Bangla Agricultural University, Sher-e-l3angla Nagar. Dhaka during the period from January to June 2015 to find out the performance of sonic hybrid rice lines comparing with 2 itibreds and 2 hybrids as check varieties in born season. The experiment comprised of 23 varieties viz. (i) 13RRI dhan28. (ii) BRItI dhan29. (iii) AD- I. (iv) Sampad, (v) hybrid line-I, (vi) Hybrid line-2, (vii) Hybrid linc-3. (viii) Hybrid line-4, (ix) Hybrid Line-S. (x) Hybrid line-6. (xi) Hybrid Iine-7. (xii) Hybrid hne-8, (xiii) hybrid line-9. (xiv) Hybrid line-il, (xv)Hybrid line-12, (xvi)Ilybrid line- 13. (xvii) hybrid line-14, (xviii) Hybrid line-I 5. (xix) hybrid line-16. (xx) Hybrid line-I 7. (xxi) Hybrid line-IS, (xxii) Hybrid line-19 and (xxiii) 1 111 lybrid line-20. The experiment was laid out in Randomized Complete Block Design (RCI3D) with three replications. At the time of harvest. the longest plant (106.25 cm) and the highest number of untitled grains panicle' (54.80) were found in Sampad: highest number of total tillers hill 1 (17.78) and effective tillers hilF' (16.93) were achieved by Hybrid line-5: highest dry mater weight hill' (84.77 g), highest number of total grains panicte (214.00) and tilted grains panicl& (184.67) were found in BRRI dhan29; longest panicle (27.85 cm) and highest weight of 1000- grains (30.64 g) were recorded in Hybrid line-I 1 and Act-i. respectively. t h5, straw yield (12.42 t ha 1 ) and biological yield (23.05 t ha') were found in Hybrid line-I 7. In the ease ol However, the highest grain yield (10.63 z( days to maturity, the hybrid lines took 142 days (Hybrid line-). 9 and 16) to 160 days (hybrid line-4, 5. 6, 7. 8. 13 7 14 and 20). Contrarily to that. the check varieties took 160 days (BRRI dhan28. ACI- I and Sampad) to 165 days (BRRI dhan29) to get niau.tred. The hybrids matured 5 to 23 days earlier than the check varieties. In addition. hybrid line-17 showed 36.79%, 22.40%, 22.91% and 30.65% yield advantages over BRRI dhan28, BRRI dhan29. ACI-1 and Sanipad, respectively. As such, the Hybrid line-17 could safely he recommended for further trials at multi-locations in boro season of Bangladesh.