An Evaluation of Early Rice Genotypes for Yield and Yield Attributing Characters in Madhesh Province of Nepal

Özet

Rice plays crucial role in sustaining nutrition and sustaining livelihoods nutritional and livelihood globally but lack of high yielding and early maturing varieties cause problem in sustainable production. Thus, the study was conducted to evaluate the performance of early rice genotypes in Madhesh province, focusing on yield and yield attributing characters. The research was laid in randomized complete block design (RCBD) with two replications and twenty-four genotypes (2 check varieties Hardinath-1 & Hardinath-3) in CNRM Bardibas. Geographically, it is suited at altitude 26˚52’0’’8North, longitude 85˚49’96’’ East; 78 m above sea level, AFU. The research was laid out in one factorial randomized complete block design (RCBD) with two replications and twenty-four genotypes (2 check varieties Hardinath-1 & Hardinath-3) in CNRM Bardibas, AFU. The planting distance between the rice plant was 20*20 cm with plant plot size:1.5x3=4.5 and the spacing between two plots consecutive plots was maintained 0.5 m.  Key agronomic traits of growth, yield and yield attributes characters were recorded. Data was entered and tabulated using MS-Excel and analyzed using Gen-stat ver. 2015. Mean separation was done by DMRT at 5% level of significance. The results revealed that highest yield (6.87 t/ha) was achieved by the genotypes IR-18-A-2294, followed by IR-19-A-5000 (6.516 t/ha), NS-314(6.24 t/h), NS-278(6.26 t/h), Hardinath-3(6.24t/h) and least by NS-232(3.91t/h). Hardinath-1 (86.5 DAT) had early maturity followed by NS-201 (91 DAT), Hardinath-3 (94 DAT), IR-132T799(96DAT) & IR-132084-B-1191-1-2-B-12 (96 DAT) whereas late maturity was observed in NS-313 (104 DAT) and yields were 5.24 t/h, 5.14 t/h, 6.24 m/t, 5.37 t/h, 4.87 t/h & 5.98t/h respectively. Based on  grain quality and yield, IR-19-A-5000,  IR-18-A-2294 were found as high yielding genotypes respectively, while based on earliness and yield potential Hardinath-1, IR-132T799 and Hardinath-3 were found superior among tested. These results provide valuable insights into the selection and development of rice varieties adapted to the specific agro-ecological conditions of Nepal.