Fine mapping of rice drought QTL and study on combined effect of QTL for their physiological parameters under moisture stress condition
Journal Title: Journal of Applied and Natural Science - Year 2016, Vol 8, Issue 4
Abstract
The present investigation was undertaken to study the effect of different yield QTL (DTY2.2, DTY3.1 and DTY8.1) under drought and their physiological response to drought stress. Backcross Inbred Lines (BILs) of IR64 (CB-193 and CB-229) along with IR64, APO and the traditional rice variety Norungan were raised in green house condition under water stress and control to evaluate the effect of the QTL on grain yield. The BIL CB-193 recorded higher photosynthetic rate (22.051), transpiration rate (7.152) and Ci/Ca ratio (0.597) whereas the BIL CB-229 recorded high relative water content (80.76%). It was found that the combination of three QTL (CB-229) performed better than the susceptible parent and the line with two QTL (CB-193 Fine-mapping of two QTLs viz., qDTY2.2 and qDTY8.1, for grain yield (GY) were conducted using backcross derived lines. Composite interval mapping analyses resolved the originally identified qDTY2.2 region of 6.7 cM into a segment of 2.1 cM and two sub QTLs at region between RM23132 and RM1578 (75.75 cM- 77.66 cM), RM515 and RM1578 (75.11 cM-77.66 cM) were identified in qDTY8.1 region. However this study provides a unique opportunity to breeders to introgress such regions together as a unit into high-yielding drought-susceptible varieties through MAS.
Authors and Affiliations
K. Baghyalakshmi, P. Jeyaprakash, S. Ramchander, M. Raveendran
Keywords
Related Articles
- EP ID EP285628
- DOI -
- Views 82
- Downloads 0
Emamectin benzoate: Potential larvicide and antifeedant agent against cotton Boll worm Helicoverpa armigera (Lepidoptera: Noctuidae)
Helicoverpa armigera, a global polyphagous pest, attacks a wide variety of crops causing huge agricultural loss. Overuse of conventional insecticides for Helicoverpa control has made Helicoverpa resistant to insecticides...
Citric acid: A potential permeabilizer against multiple drug resistance enteropathogenic Escherichia coli
Enteric diseases enter through the mouth and are usually spread by contaminated food, water or contact with contaminated vomit or feces. Enteric infection encompasses all the infections of the intestinal tract. These int...
Ethno-botanical survey for wild plants in fringe villages around Shimla Water Catchment Sanctuary, Himachal Pradesh, India
In this study an ethno-botanical survey was carried out in the fringe villages located at the periphery of Shimla Water Catchment Sanctuary. As the sanctuary area is not completely fenced the villagers have an access ins...
Effect of pre-sowing treatments and growing media on seed germination and seedling growth of Albizia lebbeck (L.) Benth
The seeds of Albizia lebbeck have been observed to exhibit physical dormancy due to presence of hard seed-coat. To overcome this problem, the seeds were subjected to seven pre-sowing treatments viz., T1-immersion of seed...
Phytotoxic impact of Parthenium hysterophorus L. on Macrotyloma uniflorum a pulse crop in a dry tropical environment, Bihar, India
An experiment was conducted to evaluate the effect of aqueous extract of leaf, stem and root of Parthenium hysterophorus on the rate of seed germination (%) and seedling growth (cm) in Macrotyloma uniflorum. The differen...