Roshan and Shahryar, two new mutant cultivars of rice (Oryza sativa L.) with distinguished agronomic and grain biochemical properties

Arefrad, Mehdi; Nematzadeh, Ghorban Ali; Arab, Mozhdeh; Raei, Ali; Avakh, Fatemeh; Aliakbari, Fatemeh; Oladi, Morteza; Afkhami Ghadi, Ammar; Younesi-Melerdi, Elham; Vadipour, Faeze

doi:10.22058/jpmb.2023.556240.1258

Roshan and Shahryar, two new mutant cultivars of rice (Oryza sativa L.) with distinguished agronomic and grain biochemical properties

Document Type : Original research paper

Authors

Mehdi Arefrad ¹

Ghorban Ali Nematzadeh ²

Mozhdeh Arab ³

Ali Raei ⁴

Fatemeh Avakh ⁵

Fatemeh Aliakbari ⁵

morteza oladi ⁶

Ammar Afkhami ghadi ⁷

Elham Younesi-Melerdi ⁸

Faeze Vadipour ⁵

¹ Genetics and Agricultural Biotechnology Institute of Tabarestan (GABIT) Sari, Mazandaran, Iran. P.O.Box: 578, Tel: +98 151 382578

² GAbit

³ National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran

⁴ Agricultural biotechnology, Shahid Beheshti University

⁵ Sari Agricultural Sciences and Natural Resources University (SANRU), Sari, Mazandaran, Iran

⁶ PhD student of plant breeding - genetic engineering, Sari Agricultural Sciences and Natural Resources University (SANRU), Genetics and Agricultural Biotechnology Institute of Tabarestan (GABIT)

⁷ PhD in Plant breeding and genetic engineering, Genetics and Agricultural Biotechnology Institute of Tabarestan (GABIT), Sari, Mazandaran, Iran. P.O.Box: 578.

⁸ Genetics and agricultural biotechnology institute of Tabarestan, Sari agricultural sciences and natural resources university, Iran

10.22058/jpmb.2023.556240.1258

Abstract

To better understand the genetic relationships between quantitative and qualitative characteristics of rice, the most important agronomic traits, seed physicochemical properties, and storage protein compositions were evaluated in different quantitative and qualitative cultivars including two new mutant cultivars, their parents and their common ancestor. The result of agronomic traits shows that two mutant cultivars, Roshan and Shahryar, have the highest yield (8500 and 8000 kg/ha respectively) accompanied by some desirable agronomic characteristics such as lodging resistance, early maturity period, a high number of tillers and high panicle length. The qualitative properties evaluation also revealed these two novel mutant cultivars were characterized by good cooking and eating properties. Roshan has moderate amylose content (AC), and both were similar to Sangetarom, a qualitative cultivar, in terms of gelatinization temperature (GT) and gel consistency (GC). The recessive variant of the BADH2 gene was also observed in Roshan and Sangetarom. Moreover, the Shahryar cultivar showed a significant decrease in prolamin protein when compared to the parent and the other cultivars. Generally, no significant relationship was detected between agronomic characteristics and yield with seed biochemical properties, such as cooking and eating quality, fragrance and storage protein content. These results promise that by identifying and pyramiding desirable alleles, especially alleles involved in starch synthesis, fragrance and prolamin protein biosynthesis, can lead to obtaining rice cultivars with higher quantitative and qualitative properties.

Keywords

Agronomic characteristics

Cooking and eating quality

Physicochemical properties

Storage proteins

20.1001.1.23223332.2021.9.2.6.4

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