Integrated physiological and molecular approaches to improvement of abiotic stress tolerance in two pulse crops of the semi-arid tropics

Choudhary, Arbind Kumar; Sultana, Rafat; Vales, M. I.; Saxena, K B; Kumar, Ravi Ranjan; Ratnakumar, P.

doi:10.1016/j.cj.2017.11.002

Cited by 54 publications

(36 citation statements)

References 95 publications

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“…In addition, the minimum relative humidity of 26 % was 42 % lower than that of the 2015 trial (Table 3). According to Choudhary et al (2018), drought commonly occurs combined with other environmental stresses, such as excessive light incidence, heat, and low relative humidity, and characterizes multiplicity of stresses in the tropics. For rice, along with drought, high temperature (up to 33.5 °C) contributed to yield reduction due to the shortening of the vegetative period and high spikelet sterility (Peng et al, 1995;Matsui et al, 1997;Shah et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Upland rice: phenotypic diversity for drought tolerance

Lanna

Coelho

Moreira

et al. 2021

Sci. agric. (Piracicaba, Braz.)

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Upland rice is cultivated mostly in Latin America and Africa by small farmers and in areas with risk of dry spells. This study evaluated morphophysiological mechanisms of upland rice associated to drought adaptation. A set of 25 upland rice genotypes were grown in a plant phenotyping platform during 2015 and 2017 under regular irrigation and water restriction. We evaluated morphophysiological traits in shoots (vegetative structures growth, gas exchange, water use efficiency, carboxylation efficiency, water status) and roots (length, surface area, volume and diameter), as well as agronomic traits (grain yield and its components). There was a reduction in grain yield by up to 54 % and 58 % in 2015 and 2017, respectively, under water deficit. Five upland rice genotypes with the best yield performances in both water treatments applied were recommended to the upland rice-breeding program: Bico Ganga, BRS Esmeralda, BRSMG Curinga, Guarani, and Rabo de Burro. In this study, morphophysiological traits associated to drought tolerance concerned the plant high capacity to save water in the leaves, low leaf water potential, high ability to reduce vegetative structures, high water use efficiency, high photosynthetic capacity, and improved capacity to absorb water from drying soil, either by osmotic adjustment or additional investment into the root system. Therefore, we concluded that different secondary traits contributed to drought tolerance and should be evaluated along with grain yield to improve efficiency of breeding selection.

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Section: Resultsmentioning

confidence: 99%

Upland rice: phenotypic diversity for drought tolerance

Lanna

Coelho

Moreira

et al. 2021

Sci. agric. (Piracicaba, Braz.)

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“…Breeding for drought tolerance is a big challenge, particularly in a crop like pigeonpea where roots often grow >2 m deep. Since pigeonpea takes a long time to mature, the crop encounters spells of intermittent droughts in both early and post-rainy seasons due to significant variations in the pattern and quantum of rainfall that is brought about by climate changes ( Choudhary et al 2018 ). The unpredictable arrival of monsoon and uncertain intermittent dry spells (particularly after the first rain) are most harmful to the crop as they adversely affect the seedling establishment and early growth.…”

Section: Discussionmentioning

confidence: 99%

Can pigeonpea hybrids negotiate stresses better than inbred cultivars?

et al. 2020

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Pigeonpea [ Cajanus cajan (L.) Millsp.] is an important rainfed pulse crop of tropics and sub-tropics, and during its long growth cycle of 6–9 months it encounters a number of biotic and abiotic stresses. The recently developed CMS-based pigeonpea hybrids have demonstrated large gains in yield and stability over the traditional inbred cultivars. In this review, the authors argue that the heterosis expressed in traits like seed germination, radicle growth, root biomass production and moisture retention during water stress confers advantages to hybrid plants in negotiating a few abiotic and biotic stresses in much better way than pure line cultivars.

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“…Heat stress decreases grain yield through increasing the proportion of unfilled pods and decreasing the duration of the reproductive growth stage [50]. the consequent impact of reduced sucrose content in the leaves and anthers [31,51]. Tolerance to heat stress is closely related to the rate of transpiration and evaporation.…”

Section: Heatmentioning

confidence: 99%

“…Diversity in the desi type is slightly higher than in the kabuli type which is defined by post domestication traits such as large and light colored seeds [3]. However, the overall narrow genetic base within the elite chickpea germplasm due to the domestication bottleneck necessitates the need to intensify the use of wild relatives and landraces as sources of adaptive traits/genes to confer resistance to abiotic stresses (Table 2) and improve genetic gains [18,51,65,66]. Wild relatives are native and adapted, through evolution, to the environmental conditions experienced at the crop's centers of origin.…”

Section: Explore Wild Relatives and Landraces Available At Grain Genementioning

confidence: 99%

Breeding for Abiotic Stress Adaptation in Chickpea (Cicer arietinum L.): A Comprehensive Review

2020

Crop Breed Genet Genom.

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Chickpea is an important legume crop, providing a protein rich diet for humans and animal feed. Globally, chickpea is grown in over 56 countries, occupying a production area of approximately 17.8 million ha. The crop is grown mainly in arid and semi-arid regions under rainfed conditions, where it is highly vulnerable to abiotic stresses such as heat, frost and drought at various growth stages during the season. Severe yield losses due to abiotic stresses have been recorded, especially when the crop is exposed to adverse conditions during the reproductive phase, causing instability in chickpea production worldwide. Breeding for tolerant chickpea that is widely adaptable to various growth conditions and diverse growing regions is the best strategic approach but requires a finetuned combination of advanced phenotyping and genotyping methods. However, breeding and selection of suitable chickpea genotypes is complicated by its narrow genetic base which limits the sources of novel alleles, and its indeterminate growth habit that at times allows it to recover, flower, set pods and yield following stressful events if subsequent conditions are favorable. This manuscript provides an insight into common abiotic stresses affecting chickpea production worldwide with an emphasis on heat, frost and drought. We will elaborate on breeding approaches and application of advanced genotyping and phenotyping tools commonly used to develop tolerant chickpea varieties. Finally, key crop tolerance traits that can be easily screened for by using genotypic and phenotypic technologies will be discussed.

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Integrated physiological and molecular approaches to improvement of abiotic stress tolerance in two pulse crops of the semi-arid tropics

Cited by 54 publications

References 95 publications

Upland rice: phenotypic diversity for drought tolerance

Upland rice: phenotypic diversity for drought tolerance

Can pigeonpea hybrids negotiate stresses better than inbred cultivars?

Breeding for Abiotic Stress Adaptation in Chickpea (Cicer arietinum L.): A Comprehensive Review

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