Genetic analysis of upland rice genotypes and allele mining for phosphorous deficiency tolerance / (Record no. 4011)
[ view plain ]
| 000 -LEADER | |
|---|---|
| fixed length control field | 03649nam a2200205Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20220103120031.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 130502s9999 xx 000 0 und d |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | CPGS |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 633.179233 |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Dohling, Aibanshan K. |
| 9 (RLIN) | 890 |
| 245 ## - TITLE STATEMENT | |
| Title | Genetic analysis of upland rice genotypes and allele mining for phosphorous deficiency tolerance / |
| Statement of responsibility, etc | by Aibanshan K.Dohling |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Umiam : |
| Name of publisher, distributor, etc | CPGS, CAU |
| Date of publication, distribution, etc | c2011 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | [24], 108p.: |
| Other physical details | ill., some col.; |
| 440 ## - SERIES STATEMENT/ADDED ENTRY--TITLE | |
| Title | [Genetics and Plant Breeding, School of Crop improvement] |
| 9 (RLIN) | 895 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc | Abstract:<br/><br/>Rice belongs to the genus Oryza of the family Gramineae. It is one of the three important food crops in the world and forms the staple food of 2.7 billion people India is the largest rice growing country and 2nd in terms of production. Upland rice is grown in Asia, Africa and Latin America. Of about 150 mha of world rice area in the mid 1990s, about 14 mha were planted to upland rice Upland rice soils are predominantly acidic (pH varies from 4 to 6) and depleted in major elements. In South and Southeast Asia, more than half of the upland rice is grown in infertile soils. In most upland soils, Phosphorus (P) rather Nitrogen is the most common limiting nutrient.The present investigation was carried out to screen a panel of upland rice genotypes for P deficiency tolerance using hydroponic experiment and to find out allelic differences between tolerant and susceptible genotypes for some of the major genes reported to impart phosphorus deficiency tolerance. In addition, Line x Tester analysis was performed to identify the best upland rice genotypes and cross combinations that can be used for varietal development programme to develop soil acidity tolerant upland rice.By means of hydroponic experiment conducted using Yoshida's solution, tolerant and susceptible genotypes were identified based on parameters like root growth, root/shoot, fresh weight and dry weight. Kasalath and IR1552 were used as the tolerant check and susceptible check respectively. Tolerant genotypes showed higher values for these parameters under P deficient conditions (0.5mg/l) as compared to control condition (20 mg/I) It may however be mentioned that there were no significant differences between the tolerant and susceptible genotypes in terms of plant height. Allele mining on a selected panel of 16 tolerant and susceptible genotypes was carried out for pup1 and ptf1 genes. Most tolerant genotypes showed similar Kasalath like alleles for the Pup1 gene. However, some of the genotypes did not show Kasalath like allele, suggesting a different tolerance mechanism at work. Single Nucleotide Polymorphisms (SNPs) were found in two of the tolerant genotypes, while one was spotted across four other genotypes for the OsPTF1 gene but whether or not they directly impart tolerance is not clear at this point.In the genetic analysis, among the lines, Dhan and Epyo, while among the testers RCPL 116 and Bhalum 2 showed the best general combining ability while the crosses ARR09 X RCPL116 (L4xT2), N902 X RCPL116 (L3xT2), EPYO X N902 (L1xT3) showed the best specific combining ability. Also, for heterosis ARR09 )( RCPL116 (L4XT2) showed maximum heterosis for five of the twelve traits studied when compared to the best commercial cultivar of the region, RCPL 115. It is hoped that the information generated in the study will lead to development of soil acidity tolerant varieties through a combination of molecular and classical breeding procedures. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Upland rice-genetic analysis |
| 9 (RLIN) | 893 |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Rai, Mayank |
| Relator term | Major Advisor |
| 9 (RLIN) | 894 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | MSc Thesis |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection code | Home library | Current library | Date acquired | Total Checkouts | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | School of Crop Improvement | CPGS | CPGS | 02/05/2013 | 633.179233 DOH | TH058 | 24/01/2020 | 02/05/2013 | MSc Thesis |