Identification of Rice Genotypes Carrying the Pup1 Locus as Potential Donors for Phosphorus Deficiency Tolerance Breeding in Southern India
Kiruba Ganesan, Ramalingam Jegadeesan
International Journal of Plant & Soil Science · pp. 114–123 · Published 10 Jan 2026
10.9734/ijpss/2026/v38i15930Abstract
Phosphorus deficiency is a major constraint for rice production. The Pup1 locus confers tolerance to low-P conditions. We screened 40 rice genotypes adapted to southern India using 10 Pup1 specific markers. Five genotypes (including Kasalath and IR64-Pup1 checks) showed the complete Kasalath-type haplotype. Three local genotypes (APO, Vandhana, Kalakeri) representing ~7.5% of the positive genotypes (excluding checks) carried the full Pup1 locus and are proposed as promising donors for marker-assisted breeding programs targeting phosphorus use efficiency in southern India.
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