<div>Background: The primary objective of the study was to find out the effect of Weather parameters on the Chakhao production. Reports postulated that crop productivity is impacted by agricultural practises rather than climate. However, yield is very much dependent on environmental and cultural conditions which are less studied and not yet defined.&nbsp;Since Chakhao is traditionally a low yielding crop of Manipur. Despite of being their great values in nutrition, medicinally and economically, the farmers of Manipur neglect the cultivation of the black scented rice in large scale due its low yield. Thus, the current study was taken to have a better understanding of the growth and yield with effect to weather parameters of the three Chakhao cultivars viz. Poireiton, Amubi, Angouba. 
 
Methods: The present investigation was conducted to study the effect of various weather parameters on growth and yield of black scented and aromatic rice cultivars of Manipur. During this study, three local rice cultivars of Manipur was cultivated&nbsp; in kharif crop season&nbsp; (June -July to November-December)&nbsp; during the year 2019 , 2020 and 2021 at PDDUIAS, Research farm of Utlou, Manipur. The experimental field is located at 24&deg;43&lsquo;78&rdquo;N Latitude, 93&deg;51&lsquo;60&rdquo;E Longitude and the elevation or altitude of 2513 feet above mean sea level. During these experiments different major growth stages were recorded, while all other input parameters were kept constant. For this study the spacing adopted was 25 cm x 25 cm. After harvesting, the agro-morphological characters compared to analyse the effect of weather parameters were Temperature, Relative Humidity, Rainfall and Wind speed for the period of 3 years i.e., 2019, 2020, 2021.&nbsp; 
 
Result: It was observed that the rice variety Chakhao Angouba resulted the highest yield followed by Chakhao Poireiton and Chakhao Amubi. The correlation between weather parameters and agro-morphological growth and yield related parameters were estimated by Pearson correlation coefficient and degree of dependencies of these agro-morphological parameters on weather parameters were analysed by using linear regression analysis. All the yield attributing characters i.e., number of panicles per plant, number of grains per panicle and 1000 grain weight (g) were taken but they do not showed significant correlation except average rainfall and the number of leaves.</div>

The Effect of Weather Parameters on Yield Performance of Some Aromatic Rice Cultivars (Oryza sativa L.) of Manipur

<div style="text-align: justify;">Eight parents of aromatic rice were crossed in half diallel mating design without reciprocal including parents. The parents were evaluated for eleven different characters. Genetic analysis was done through Griffing&rsquo;s Method II Model I. Analysis of variance revealed highly significant differences among parents and their crosses for all the characters. Combining ability analysis revealed that gca and sca variance were highly significant for most of the characters studied in F1 generation. Amongst the parental lines, Basmati Kasturi was a good general combiner for plant height at maturity, total number of spikelets per panicle, total number of filled grains per panicle and grain yield per plant in F1 generation while the most promising specific combiners for grain yield per plant were Basmati x Chakhao Angangba and Basmati Kasturi x Basmati 370.</div>

The Effect of Weather Parameters on Yield Performance of Some Aromatic Rice Cultivars (Oryza sativa L.) of Manipur

Diallel analysis of yield and its important components in aromatic rice (Oryza Sativa L.)