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 67
- Downloads 0
Effect of Cassava mill effluent on some soil chemical properties and the growth of fluted pumpkin (Telfairia occidentalis Hook F.)
In the trials, Cassava mill Effluent was used for fluted pumpkin (Telfairia occidentalis) cultivation in order to verify the influence of the effluent on the growth and some soil chemical properties. In this regard, a co...
Isolation and characterization of mineral potassium solubilizing bacteria from rhizosphere soils
Attempts were made to isolate potasium solubilizing bacteria (KSB) from rhizosphere soil of different crops in Nadia district of West Bengal. A total of ten bacteria isolates were tested for K solubilization and characte...
Diversity of parasitic fauna of conventional rice ecosystem during kuruvai season at Annamalainagar, Tamil Nadu
Arthropod natural enemies are often vital biological control agents of various insect pests of rice ecosystem which include a wide range of predators and parasitoids. Determining the natural enemies and biodiversity of r...
Partial characterization of toxins associated with stem end rot of mango caused by Lasiodiplodia theobromae
In this study, the toxicity of liquid culture media from different isolates of Lasiodiplodia theobromae was characterized and some properties of the toxic metabolites were distinguished. In this work toxin producing abil...
Comparative evaluation of different reference evapotranspiration models
The study was carried out to select best alternative method for the estimation of reference evapotranspiration (ET0). Accurate estimation of potential evapotranspiration is a necessary step in water resource management....