Genomic Dissection of Genotype × Environment Interactions Conferring Adaptation of Cotton to Arid Conditions

Saranga, Yehoshua; Menz, Monica A.; Jiang, Chunxiao; Wright, Robert J.; Yakir, Dan; Paterson, Andrew H.

doi:10.1101/gr.157201

Cited by 168 publications

(115 citation statements)

References 55 publications

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“…These studies include one involving an inter-specific cross between G. hirsutum cv. Siv'on and G. barbadense (Saranga et al, 2001;Saranga et al, 2004) and an intra-specific cross of G. hirsutum L. (Saeed et al, 2011). However, the present study is the first QTL mapping study involving a wild cotton species (G. tomentosum) and therefore the results obtained are unique compared to previous reports.…”

Section: Discussionmentioning

confidence: 62%

Mapping QTLs for drought tolerance in an F2:3 population from an inter-specific cross between Gossypium tomentosum and Gossypium hirsutum

et al. 2016

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ABSTRACT. Cotton is one of the most important natural fiber crops in the world. Its growth and yield is greatly limited by drought. A quantitative trait locus (QTL) analysis was therefore conducted to investigate the genetic basis of drought tolerance in cotton (Gossypium spp) using 188 F 2:3 lines developed from an inter-specific cross between a wild cotton species, G. tomentosum, and an upland cotton, G. hirsutum (CRI-12). A genetic map was constructed using 1295 simple sequence repeat markers, which amplified 1342 loci, distributed on 26 chromosomes, covering 3328.24 cM. A field experiment was conducted in two consecutive years (2014 and 2015) and 11 morphological and physiological traits were recorded under water-limited (W1)/wellwatered (W2) regimes at three growth stages (bud, flowering, and full boll). The traits measured included chlorophyll content, plant height, leaf area, leaf number, leaf fresh weight, leaf dry weight, boll weight, number of bolls per plant, and the number of fruiting branches. Sixtyseven and 35 QTLs were found under the W1 and W2 conditions, respectively. Of these, the majority exhibited partial dominance or over-dominance genetic effects for increasing the trait values. Four consistent QTLs were found under the W1 treatment on chromosomes 5, 8, 9, and 16, whereas no consistent QTL was found in W2. Thirteen QTL clusters were also identified on nine chromosomes (2, 3, 5, 6, 9, 14, 15, 16, and 21). These results will help to elucidate the genetic basis of drought tolerance in cotton.

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Section: Discussionmentioning

confidence: 62%

Mapping QTLs for drought tolerance in an F2:3 population from an inter-specific cross between Gossypium tomentosum and Gossypium hirsutum

et al. 2016

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“…The approach of QTL mapping has become crucial to the use of DNA markers in the improvement of crops species (Ramchiary e al., 2007). Several different types of DNA markers such as RFLP, RAPD, AFLP, and SSR are now in vogue in plant breeding, by which molecular maps for different crops can be made (Vos et al, 1995;Nguyen et al, 1997;Hopkins et al, 1999;Saranga et al, 2001;Quesada et al, 2002;Pradhan et al, 2003). It is hoped that this knowledge generated via molecular maps may as well be extended to target improvement of stress tolerance in plants.…”

Section: Conventional Breeding Approaches For Enhancing Salt Tolerancmentioning

confidence: 99%

Towards salinity tolerance in Brassica: an overview

Purty

Kumar

Singla‐Pareek

et al. 2008

Physiol Mol Biol Plants

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Among the various abiotic stresses limiting the crop productivity, salinity stress is a major problem, which needs to be addressed and answered urgently. Since members of Brassicaceae are important contributor to total oilseed production, there is an immediate need being felt to raise Brassica plants which would be more suitable for saline and dry lands in years to come. One of the suggested way to develop salinity tolerant Brassica plants is to make use of the broad gene pool available within the family. Efforts of breeders have been successful in such endeavors to a large extent and several salinity tolerant Brassica genotypes have been developed within India and elsewhere. On the other hand, transgenic technology will undoubtedly continue to aid the search for the cellular mechanisms that confer tolerance, but the complexity of the trait is likely to mean that the road to engineer such tolerance into sensitive species will not be easy. However, with increasing number of reports available for suitable genetic transformation for various Brassica genotypes, there is a hope that salinity tolerance can be improved in this important crop plant. In this direction, the complete genome sequence of related wild plants such as Arabidopsis or crop plants such as rice can also serve as a platform for identification of "candidate genes". Recently, complete genome sequencing of the Brassica genomes has also been initiated with the view that availability of such useful information can pave way towards raising Brassica with improved tolerance towards these stresses. In the present paper, we discuss the success obtained so far; in raising brassica genotypes with improved salinity tolerance employing both plant breeding and/or genetic engineering tools.

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“…Although water is the most plentiful molecule on the surface of the earth, its availability strongly affects terrestrial plant production (Pospíšilová et al, 2000). Water shortage, the major factor limiting plant growth and crop productivity worldwide, is anticipated to increase with the spread of arid lands (Saranga et al, 2001). Furthermore, future climatic changes are expected to increase risks of drought (Rizza et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Genotypic variability for root/shoot parameters under water stress in some advanced lines of cotton (Gossypium hirsutum L.)

Riaz¹,

Farooq²,

Sakhawat³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. Research pertaining to genetic variability parameters, heritability, and genotypic, phenotypic, simple, and environmental correlations for various seedling traits in five elite advanced cotton (Gossypium hirsutum L.) lines (FH-113, FH-114, FH-941, FH-942, and FH-2015) and one check (CIM-496) was carried out during October and November 2010 under greenhouse conditions at the Cotton Research Institute (Faisalabad, Pakistan). Material was raised in plastic tubes with a randomized complete block design replicated three times. Three drought shocks were applied by withholding water from the tube-sown plants for 8-, 10-, and 12-day intervals. After 60 days of sowing, data on root/shoot traits like root length (cm), shoot length (cm), root weight (g), shoot fresh weight (g), lateral root number, root dry weight (g) shoot dry weight (g), and total plant weight (g) were recorded. Considerable genotypic variations existed between genotypes for all seedling characters. Higher broad-sense heritability estimates were found for all traits studied. Maximum broad- Genotypic variability of Gossypium hirsutum sense heritability coupled with high genetic advance in root length (0.99, 17.34), lateral root number (0.91, 2.89), and shoot length (0.90, 4.35) suggested a potential for genetic improvement through breeding and selection. The correlation coefficients among root length, shoot length, root dry weight, fresh shoot weight, and total plant weight were positively and significantly correlated; thus, they can be selected simultaneously as drought tolerance selection indexes owing to the absence of undesired relationships. Genotypes FH-942 and FH-113 had the lowest excised leaf water loss during the first 4 h and also for the next 4 h. Therefore, these two advanced lines with high initial water content and lower excised leaf water loss had better adaptation to water stress.

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Genomic Dissection of Genotype × Environment Interactions Conferring Adaptation of Cotton to Arid Conditions

Cited by 168 publications

References 55 publications

Mapping QTLs for drought tolerance in an F2:3 population from an inter-specific cross between Gossypium tomentosum and Gossypium hirsutum

Mapping QTLs for drought tolerance in an F2:3 population from an inter-specific cross between Gossypium tomentosum and Gossypium hirsutum

Towards salinity tolerance in Brassica: an overview

Genotypic variability for root/shoot parameters under water stress in some advanced lines of cotton (Gossypium hirsutum L.)

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