Effect of Recurrent Selection on Drought Tolerance and Related Morpho-Physiological Traits in Bread Wheat

Abstract

Drought is one of the major abiotic stresses affecting wheat yield. A recurrent selection program was conducted to improve the drought tolerance and yield of bread wheat using drought tolerant advanced breeding lines from a drought tolerant x susceptible cross (HI 1500 x HUW 510). The parental lines were evaluated for yield, biomass and harvest index (HI) in addition to the drought adaptive traits like Canopy Temperature (CT), chlorophyll content and Normalized Difference Vegetative Index (NDVI). After three rounds of recurrent selection, the half sib progenies exhibited a marked reduction in CT, chlorophyll content and biomass; whereas improvement was noted for yield, HI and NDVI. Drought tolerance of the half-sib population appeared enhanced as indicated by drought indices and grain yield. Compared to base population, half-sibs showed better HI, grain filling and a significant (17.1%) increase in grain yield under water stress conditions. Cooler canopies and increased early vigour might have contributed to drought tolerance. A favourable combination of gibberellin sensitive and insensitive Rhtalleles was observed in the recombinant progenies. However, increased yield under water stress had a negative trade off in reduction of biomass. The study also identified potential lines with high yield and drought tolerance for subsequent varietal development for water limited areas.

Comparative Aerial and Ground Based High Throughput Phenotyping for the Genetic Dissection of NDVI as a Proxy for Drought Adaptive Traits in Durum Wheat

“…As expected, grain-filling stages appeared the most valuable for detecting NDVI-related genetic differences among genotypes (61.2% of which were identified at the grain-filling stage) in response to the progressive onset of senescence and drought stress related to the water-shortage treatment. Along this line, breeding strategies for enhancing drought tolerance are increasingly adopting remote-sensing of NDVI and other spectral technologies (Monneveux et al, 2012 ; Araus and Cairns, 2014 ; Ramya et al, 2016 ; Trapp et al, 2017 ).…”

Screening and Identification of Upland Rice Lines Derived Recurrent Selection for Drought Tolerance

“…In other words, this method is a procedure of collecting the desired characters of a combination crosses with some continuously crossing selected segregants in order to obtain better population than previous ones, due to the plants have a combination of desired characters. Reference [11] reported that recurrent selection in Wheat Bread plants could identify potential lines with high yield and drought stress tolerant for limited water resource areas. Recurrent selection techniques have also been carried out by [12] with 8 cycles to genetically estimate the progress yield of a chickpea.…”

Genetics Diversity and Agronomic Characters of F3 Lines Selected by Recurrent Selection for Drought Tolerance and Blast Resistance of Bengkulu Local Rice Varieties

“…Based on grouping the number of tillers [20], the number of productive tillers in Bugis/IR7858-1 ranged from 2.0-21.0, whereas Bugis/IR148 had 1.0-17.0 (Table 4). Therefore, population of lines derived Bugis/IR7858-1 more dominant being moderate to high, and can be grouped into 62 medium productivity lines (10)(11)(12)(13)(14)(15)(16)(17)(18)(19) and 59 high productivity lines (> 19), whereas those 140 genotypes derived from Bugis/IR148 had 52 very low productivity lines (<5) and two had low productivity lines (5-9) (Table 4). The number of productive tillers in genotype results of crossing Sriwijaya/IR148 and Sriwijaya/IR7858-1 more dominant in low to medium productivity lines (Table 4).…”

“…The result lines of the RS method from B11742 crossing combination produced plant segregate which has new plant type and resistance to leaf blight disease and better quality of rice [14]. Newest reported by [15] that the effect of recurrent selection on drought tolerance also identified potential lines with high yield and drought tolerance for subsequent varietal development for limited water areas in Breat Wheat.…”