Department of Agrotechnology, Faculty of Agriculture, Universitas Sebelas Maret, Surakarta, Indonesia

E-mail: prakosa.dj@student.uns.ac.id

Rice (Oryza sativa L.) is the main food crop in Indonesia. The Mentik Wangi variety is a local variety of rice plants (Oryza Sativa L.) in Indonesia and has a distinctive and natural aroma and a fluffier texture of rice that it is in demand by most Indonesian people for consumption. However, Mentik Wangi rice has drawbacks in terms of plant height and age. Improving the quality and quantity of Mentik Wangi can be done by plant breeding such as gene mutation,  withgamma rays. The aim of this research are (1) to determine the performance of Mentik Wangi M4 rice with the effect of 250 gray gamma ray irradiation and (2) to select M4 rice to obtain short stem, short-lived and high productivity rice. This research was carried out  from July – September 2020 at the Tegalgondo Rice Seed Center, Gatak District, Sukoharjo Regency by planting a number of 30 plants with a distance of 25 x 25 cm. Each Mentik Wangi rice strain resulting from gamma ray irradiation of 250 Gray was planted in parallel without randomization and then observed each individual plant to compare with control plants and select plants according to their purpose. This study showed that the performance of the M4 generation of Mentik Wangi rice mutants produced by 250 gray gamma ray irradiation was better with control plants (without irradiation). The M4 line had lower plant height and higher productivity than control plants. The results of the selection of M4 Mentik Wangi rice from 250 gray gamma ray irradiation which have short stems and high productivity are: M3-250-G29-8-34 (25) (16), M3-250-G29-8-24 (4) ( 7) (25) (27) (28), M3-250-G62-17-59 (22) (25) (27) , M3-250-G62-6-5 (25) (28) (30) , M3-250-G23-22-4 (13) (23) (29), M3-250-G62-17-57 (3) (6) (29), M3-250-G60-3-7 (4) (10) (14), M3-250-G22-8-57 (11) (29) , M3-250-G23-22-20 (23) (28) and M3-250-G62-17-61 (8 ) (16) (26).