Researchers identify high-yielding aman, boro paddies

Researchers have identified rice varieties with the best yield performance for both aman and boro seasons after rigorous on-farm trials.

BRRI dhan88, BRRI dhan96 and BRRI dhan92 are the best yield performers of the boro season, according to research conducted by the researchers of Bangladesh Rice Research Institute (BRRI) and the International Rice Research Institute (IRRI).

Besides, the IR13F441 line and BRRI dhan79 can perform well in a flash flood-prone environment in aman season.

The findings of the research were revealed in a workshop jointly organised by the BRRI and the IRRI in Gazipur today.

Once disseminated for cultivation, these varieties are expected to help increase rice farmers' yield and profit, IRRI said in a press release.

Besides, BRRI dhan93, BRRI dhan94, and BRRI dhan95 are highly preferable in the northern part of Bangladesh as an alternative to the Indian rice variety Swarna. BRRI dhan87 had the best yield performance all over the country, it said.

These rice varieties were identified after researchers conducted several "head to head adaptive trials (HHATs)" for three years in different locations across the country, IRRI said.

They conducted HHATs to investigate the performance of newly released varieties compared to popular old mega varieties through generating sufficient quantitative data.

During these trials, newly-developed varieties, benchmark varieties, and farmer-grown varieties are planted together in one plot to compare their performance closely.

The research also identifies promising varieties and how they adapt to the various target environments.

During these trials, researchers collect feedback about the varieties from farmers and extension personnel. These trials also generate curiosity, knowledge, and demand for new and better-performing varieties through the demonstrated impacts in the field.

The findings also showed that BRRI dhan28 gave the lowest yield, having the highest pest incidence which should be replaced immediately. Meanwhile, BRRI dhan29 produced a competitive yield along with BRRI dhan89, however, it was infected by neck blast disease in some locations, IRRI said. 

Md Humayun Kabir, chief scientific officer and head adaptive research division of BRRI, presented the findings of BRRI and Swati Nayak, IRRI scientist and South Asia Lead - seed system and product management, presented the results of the trials from their end.

"Such on-farm trials allow us to know how the previous varieties are performing compared to the newer ones. Currently, rice varieties are being developed keeping in mind the regions where they are grown, said Nayak.

"Our study shows if the newer varieties are up to the mark or whether it needs further development for the betterment of the farmers and the country,"

"Developing better rice varieties that are more adaptive to specific environments is important in ensuring that we can increase the production of rice in the country," said Md Shahjahan Kabir, director general of BRRI.

The next step is making these varieties accessible to farmers across the country to help improve their yield and profit, helping them gain a better livelihood," he said while addressing the programme as chief guest.

Mohammad Khalequzzaman, research director of BRRI, chaired the workshop.