TR-RNR-21, is a new medium-duration rice variety, released in Andhra Pradesh
1988
Nasahari, P. (Bhabha Atomic Research Center, Trombay, Bombay (India). Nuclear Agriculture Div.)
TR-RNR-21 is a derivative of the cross IR8/TR-5. TR-5 is a Nf-induced dwarf mutant of salinity resistant SR-26-B. In initial yield evaluations in 1972-78, it gave 54% higher yields than Jaya in the wet season and 19% in the dry season and compared favorably with IR8 and Sona. Compared with Pankaj, Jaya. RP-4-14, Sona, Surekha, RNR-32341 and Prabhat, in 1975-80 trials, TR-RNR-21 gave average yields 10.1% higher than those of the highest yielding checks and 19.8% higher than the average of 7 checks. In minikit trials at more than 90 sites in 9 districts of Telangana region, mean grain yield (3.8 t/ha) was 19% higher than yield of local checks. TR-RNR-21 was released in 1987 as Hari, for general cultivation under irrigated transplanted conditions in Telangana region, A.P. (except in the endemic gall midge prone areas). Hari is characterized as follows: medium duration (135-140 d); semidwarf (93 cm); erect, compact and nonlodging with dark green foliage; no anthocyanin pigment; long (10.14 mm) slender grain with kernel length (7.35 mm):breadth (2.08 mm) ratio of 3.54; flinty, white, translucent, non-glutinous grain; no white belly; 1,000-grain weight 25.2 g; protein content, 7.14%; hulling, milling, and head rice recovery, 80, 74.5, and 68%, respectively; good cooking quality. It is tolerant of blast tungro virus, sheath blight, and brown leaf spot diseases and green leafhopper, leaffolder and stem borers. A distinguishing characteristics is a long flag leaf that grows far above the panicle and remains green even after maturity.
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