Highly conserved TaPstol5AS - 1, a wheat ortholog of OsPstol1 has undergone a high selection pressure
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ORIGINAL ARTICLE
Highly conserved TaPstol5AS-1, a wheat ortholog of OsPstol1 has undergone a high selection pressure G. Hari-Gowthem1
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Priti Sharma1 • Inderjit Yadav1 • Satinder Kaur1 • Parveen Chhuneja1
Received: 31 March 2020 / Accepted: 18 August 2020 Ó Society for Plant Biochemistry and Biotechnology 2020
Abstract Phosphorus (P) is the most important non-renewable fertilizer determining agricultural production and productivity of any crop. Wheat is one of the prime cereals consumed worldwide providing calories, vegetable protein and dietary fibre to the growing population. Wheat cultivation consumes nearly 40% of the P used by cereal crops annually which is higher than any other cereal crop. Unlike other nutrients, P gets complexed and fixed in the soil and only a small proportion of the P applied as fertilizer is available to the crop; additionally, loss of P through seepage of water into the water bodies causes eutrophication. An economical, environmentally-friendly and sustainable solution would be to identify QTL(s)/gene(s) responsible for efficient P uptake and use. OsPstol1 in rice was reported to enhance early root growth thus causing an improved P uptake and eventually increased yield. In this investigation we attempted to explore the genetic diversity of the wheat ortholog of OsPstol1 in a diverse panel of germplasm. On re-sequencing we found the putative wheat ortholog TaPstol5AS-1, to be highly conserved in 33 wheat germplasm, and speculate it to have undergone high selection pressure. Additionally, we also hypothesize that Pstol in wheat could be a group of homo(eo)log, regulating the P homoeostasis in wheat like SbPSTOL1 (Sorghum) and ZmPSTOL1 (Maize). Keywords Wheat Pstol Phosphorus use efficiency Aegilops tauschii Triticum dicoccoides Synthetic wheat Abbreviations P Phosphorus Pstol Phosphorus starvation tolerance SNP Single nucleotide polymorphism
Introduction Agricultural production has always been determined by the availability of various agricultural inputs among which fertilizers have a major role to play in attaining the desired productivity in addition to high-yielding varieties Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13562-020-00589-2) contains supplementary material, which is available to authorized users. & Parveen Chhuneja [email protected] 1
School of Agricultural Biotechnology, Punjab Agricultural University, Ludhiana, Punjab, India
particularly after the Green Revolution. Among various fertilizers the ones providing the primary nutrients viz., nitrogen (N), phosphorus (P) and potassium (K) has a greater impact on the yield of the crop. P gets its importance due to the non-renewable nature of its sources unlike N whose usual fertilizer urea, is synthesized. P reserves are feared to get exhausted in less than a century making the improvement of crops with enhanced P-use, the need of the hour. Moreover, unlike most of the essential nutrients P has a peculiar characteristic of getting fixed in most of the soil typ
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