Contribution of IR20 and IR64 in Developing Three Bangladeshi Popular Rice Cultivars

Ahmed, MM Emam; Biswas, Avijit; Afrin, Sadia

doi:10.9787/pbb.2022.10.2.81

Cited by 4 publications

(5 citation statements)

References 29 publications

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“…A straight cross between BR10 and BRRI dhan31 led to the development of BRRI dhan44, a variety that can withstand tidal floods. Additional BRRI dhan44 and IRRI line crossings produced the BRRI dhan76 and BRRI dhan77 varieties, which had better tidal flood resistance and agronomic features (Ahmed et al, 2022).…”

Section: Important Progenies Of Br11mentioning

confidence: 98%

“…It is now considered to represent the typical Boro season production potential for short-duration rice types. BRRI dhan28 regularly produces good yields at the farm level despite having a tendency to lodge during maturity, making it frequently utilized as a standard check by rice researchers (Ahmed et al, 2022).…”

Section: Important Progenies Of Brri Dhan28mentioning

confidence: 99%

“…Another rice variety known as BRRI dhan29 was produced by crossing BG90-2 and BR10, with BR10 from the T. Aman variety serving as the male parent (Ahmed et al, 2022).…”

Section: Development Of Brri Dhan29mentioning

confidence: 99%

See 2 more Smart Citations

Breeding History of Three Mega Rice (Oryza sativa L.) Varieties (BR11, BRRI dhan28, BRRI dhan29) of Bangladesh – A Review

Das

2023

Preprint

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Rice is a staple food consumed by billions of people worldwide, particularly in Asia. However, outdated rice cultivars and poor cultivar replacement have led to a decline in rice productivity in Bangladesh. To address this, the Bangladesh Rice Research Institute (BRRI) developed three mega rice varieties: BR11, BRRI dhan28, and BRRI dhan29. BR11 is a popular Transplanted Aman (T. Aman) rice variety known for its high yield potential, excellent cooking quality, and moderate resistance to diseases. BRRI dhan28 is characterized by clean, medium-slender grains, high amylose content, and moderate resistance to blast disease. BRRI dhan29 has a longer growth duration, high amylose content and yield potential. These three mega varieties have demonstrated high adaptation rates across different rice ecosystems in Bangladesh. The breeding history and pedigree of BR11, BRRI dhan28, and BRRI dhan29 reveal their origins from IRRI varieties, such as IR20 and IR5. These varieties have been extensively utilized as parent lines in the development of other rice cultivars with desired agronomic traits. The genetic analysis of these mega varieties has identified favorable alleles and genes associated with traits like anaerobic germination tolerance, drought tolerance, blast resistance, bacterial blight resistance, low chalkiness, and high amylose content. Mega rice varieties such as BR11, BRRI dhan28, and BRRI dhan29 have made substantial contributions to rice production in Bangladesh. Continued research and breeding efforts based on the pedigree and genetic information of these varieties can further improve rice yields, grain quality, and stress tolerance, ensuring food security for the growing population.

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Section: Important Progenies Of Br11mentioning

confidence: 98%

Section: Important Progenies Of Brri Dhan28mentioning

confidence: 99%

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Breeding History of Three Mega Rice (Oryza sativa L.) Varieties (BR11, BRRI dhan28, BRRI dhan29) of Bangladesh – A Review

Das

2023

Preprint

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“…For Boro rice, the sign is the same, but far away from a significant effect. Public rice breeders also found traits such as; high yield, better grain qualities, and tolerance to major biotic and abiotic stresses are the most urgent breeding objectives [32].…”

Section: Multivariate Analysismentioning

confidence: 99%

Rice Variety Preferences in Bangladesh – What is the Role of Public Breeders?

Biswas

Afrad

Hoque

et al. 2023

AJAEES

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This study compared preferred rice varieties by millers and farmers in Bangladesh, hypothesizing that public breeders would focus on public goods like disease resistance, whereas private breeders would focus on profits in the entire chain. Primary data were collected from 99 farmers and 68 millers, who are among the key stakeholders in the rice production system. A four-point rating scale was designed to assess the level of preference for different traits of the selected rice varieties. It was found that farmers who prioritize disease resistance prefer the public over privately bred Aman rice varieties. In general, they prefer rice varieties that are high yielding, have high market value and are of short duration while millers prefer rice verities considering the size and shape, color, and milling performance of the grains. Most significantly, millers prefer privately bred rice varieties if compared to farmers. It can be concluded that public rice breeders should take efforts to also consider the needs of intermediaries in the chain.

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“…Around 70% of the total rice produced in the country in Boro season comes from BRRI varieties. However, only two varieties, BRRI dhan28 and BRRI dhan29 are widely grown covering over 50% of the rice areas in Boro season (Ahmed et al, 2022). These varieties are very old and are showing weakness to different biotic and abiotic stresses.…”

mentioning

confidence: 99%

Recent advances in population improvement through RGA under Irrigated Boro rice breeding program in Bangladesh

M E Ahmed,

S Biswas,

Afrin

et al. 2023

Bangladesh Rice J.

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Development of new high yielding varieties needs highly accelerated breeding approaches to meet the demand of increased rice production now a days. To address this issue, Rapid Generation Advance (RGA) of segregating rice population and Line Stage Testing (LST) of fixed breeding lines has been adopted as a routine work in Bangladesh Rice Research Institute. In the present study, we described the evidence of advancing a large number of segregating population and high selection pressure at LST to isolate fixed lines in the Irrigated Boro rice breeding program. This program was implemented under development of Favourable Boro Rice and Cold Tolerant Rice. In both programs, wide variation was observed among the number of population and segregating generation at RGA nursery. A total of 62,269 individual progenies from 64 crosses were advanced through RGA in 2019 whereas 12,122 individual progenies from 45 crosses were advanced in 2020 under the FBR program. In contrast, 68,531 segregating progenies from 82 crosses and 15,004 progenies from 52 crosses were advanced through RGA under CTR program during 2019 and 2020, respectively. During LST, selection pressure was imposed for the first time to isolate homozygous lines from a pool of large number of breeding lines. The selection intensity ranged between 0.21-20.1% and 0.6-14.9% for FBR and CTR, respectively. A total of 794 fixed breeding lines having different combinations of favourable alleles of BLB, Blast and different grain quality traits were isolated from 17,633 RGA derived lines. The results obtained from this study suggested that the RGA system has become an effective tool for population improvement in a breeding program. Bangladesh Rice J.26 (1): 33-46, 2022

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Contribution of IR20 and IR64 in Developing Three Bangladeshi Popular Rice Cultivars

Cited by 4 publications

References 29 publications

Breeding History of Three Mega Rice (Oryza sativa L.) Varieties (BR11, BRRI dhan28, BRRI dhan29) of Bangladesh – A Review

Breeding History of Three Mega Rice (Oryza sativa L.) Varieties (BR11, BRRI dhan28, BRRI dhan29) of Bangladesh – A Review

Rice Variety Preferences in Bangladesh – What is the Role of Public Breeders?

Recent advances in population improvement through RGA under Irrigated Boro rice breeding program in Bangladesh

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