Screening of Cotton Cultivars for Drought Tolerance Under Field Condition

Abstract

To develop cotton germplasm with improved yield under drought conditions is one of the major goals for cotton breeders. The main purpose of this study was to evaluate 96 cotton genotypes for drought tolerance by measuring yield performance under deficit (water-limited) and full irrigation conditions. The field experiment was conducted under full (FI-100) and deficit (DI-50) irrigation conditions during the two growing seasons of 2011 and 2012 at the Agricultural Research Station of Adnan Menderes University, Aydin, Turkey. The mean data on performance of 96 different cotton genotypes showed the existance of considerable genotypic variations for yield, yield components, and drought tolerance indices. Correlation and regression analysis indicated that cotton genotypes characterizied with high GMP and low DSI could be selected as a potentially droght-tolerant genotypes. It is concluded from the present studies that, based on biplot analysis, 20 genotypes were found highly susceptile to water stress, 26 genotypes were highly susceptible to water stress but produced high yield in full irrigation, and 23 genotypes were not only water stress tolerant but also give maximum seed cotton yield. However, GC 555, Nieves, DAK-66/3, MS-30/1, Nazilli M-503, Zeta 2, Eva, NIAB 999, and Delta Diomand were found highly water stress tolerant because of maximum GMP and minimum DSI values. These genotypes could be exploited as genetic resources in breeding programs aiming to improve drought tolerance in cotton.

The effects of drought stress on physiological properties of cotton (G. Hirsutum L.)

“…Under dry conditions, the growth, development and morphological structure of cotton plant deteriorates and yield decreases significantly. These results are in agreement with those of Başal and Aydın (2006), Sezener et al (2015) and Niu et al (2018). ONCLUSIONS: Drought stress, as in many other plants, showed important results in terms of physiological properties examined in cotton.…”

Identification of stable QTLs for fiber quality and plant structure in Upland cotton (G. hirsutum L.) under drought stress

“…Each plot was harvested by hand. Harvest was performed on 29 September 2011 and 14 September 2012 (Sezener et al, 2015). Phenotyping was performed at both sites (ADU and OAE) during both years.…”

Drought Stress Modified Genetic Components and Combining Ability of Cotton Genotypes 

“…Cultivar MNH-129 didn't make su cient contribution as parent for all the traits, however it combined well with B-557 and BOU-1724 (good general combiners) to exploit its potential for number of bolls and boll weight. Varietal differences observed in parents and hybrids could be justi ed on basis of genotype and environment interaction (Sezener et al 2015;Rehman et al 2020). Non-additive gene action has been considered as important feature for the development of hybrids, for which parents with high gca is not always obligatory, nonetheless, parents having different gca may also produce superior combinations as suggested by Fasahat et al (2016).…”