HAPLOTYPE ANALYSIS OF Phosphorus uptake 1 (Pup1) AND ITS RELATIONSHIP WITH PHOSPHORUS DEFICIENCY TOLERANCE IN RICE
| dc.contributor.advisor | K K Vinod | |
| dc.contributor.author | SHYAM SUNDAR D | |
| dc.date.accessioned | 2017-10-26T06:37:34Z | |
| dc.date.available | 2017-10-26T06:37:34Z | |
| dc.date.issued | 2016 | |
| dc.description | t-9425 | en_US |
| dc.description.abstract | Imparting low P response to rice varieties has become inevitable to contain the use of P fertilizers in order get rid of it scarcity, increasing soil P deficiency and increasing P fertiliser prices and to prevent P related pollution in high input areas. A rice QTL, Pup1 has been identified to impart low P tolerance. Pup1 is a complex loci and its structure in Indian rice germplasm is largely unknown. A study was conducted to analyse the haplotype features of Pup1 in an 88-line germplasm set containing several indigenous and few exotic rice lines. The genotypes were screened at seedling stage under hydroponic screen under two P regimes, -P (0 ppm) and +P (10 ppm). The genotypes showed significant phenotypic variation in P response under two P regimes. The root traits had increased values than under -P regime, except for the root number, whereas shoot traits showed better performance under +P regimes. Among the root parameters, root length was the major trait for low P response. The genotypes could be grouped into three groups -P responders, +P responders and insensitves, based on phenotype performance. Haplotype analyses revealed that 39.4% of the Kasalath Pup1 locus was conserved in the germplasm. The conserved region itself is highly fragmented. 101 Proportion of ‘null’ alleles were more on an average, spread among the irrigated varieties. Presence of Kasalath locus in high proportion, however does not guaranteed good low P response. Few of the good -P responders were having only little fraction of Kasalath alleles. Several Basmati landraces and cultivars conserved large proportion of Kasalath allele, the evolutionary reason can be further investigated. The fragmentation of Pup1 haplotypes is further revealed by poor degree of marker trait association. The region encompassed by K46K1, K46-2 and K46-3 which carry OsPSTOL1 was key region that conformed low P response. The study emphasised that OsPSTOL1 gene be the driving factor for low P tolerance qualifying it for use rice improvement program and several indigenous sources can be used as the donor for this gene | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810033959 | |
| dc.keywords | HAPLOTYPE ANALYSIS OF Phosphorus uptake 1 (Pup1) AND ITS RELATIONSHIP WITH PHOSPHORUS DEFICIENCY TOLERANCE IN RICE | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | DIVISION OF GENETICS ICAR-INDIAN AGRICULTURAL RESEARCH INSTITUTE NEW DELHI | en_US |
| dc.sub | Genetics and Plant Breeding | en_US |
| dc.subject | null | en_US |
| dc.theme | HAPLOTYPE ANALYSIS OF Phosphorus uptake 1 (Pup1) AND ITS RELATIONSHIP WITH PHOSPHORUS DEFICIENCY TOLERANCE IN RICE | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | HAPLOTYPE ANALYSIS OF Phosphorus uptake 1 (Pup1) AND ITS RELATIONSHIP WITH PHOSPHORUS DEFICIENCY TOLERANCE IN RICE | en_US |
| dc.type | Thesis | en_US |