Impacts of High‐Temperature Stress and Potential Opportunities for Breeding

Singh, R. P.; Prasad, P. V. Vara; Sharma, Ambrish Kumar; Reddy, K. Raja

doi:10.1002/9780470960929.ch13

Cited by 7 publications

(6 citation statements)

References 120 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Limiting grain-set due to acute high temperature just before anthesis is linked to the sensitivity of microsporogenesis (pollen development) occurring at this time and loss of pollen viability, disrupted fertilization process and resultant grain sterility and also the formation of parthenocarpic grains when high temperature occurs at anthesis (Djanaguiraman et al, 2017;Tashiro and Wardlaw, 1990). Similarly for other crops such as grain sorghum and legumes (peanut), grain-set is also highly sensitive to high temperature in the period just prior to flowering (Prasad et al, 2008;Singh et al, 2011). For example, sorghum grain-set was reduced by 0.07% per °C•h above 32°C for a high-temperature treatment of 40:30°C for ten consecutive days leading up to flowering (Prasad et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Acute High Temperature Response in Wheat

et al. 2018

View full text Add to dashboard Cite

Heat waves have a significant impact on crop production and quality of many staple grains including wheat. Under climate change, changing weather patterns including greater temperature volatility are also likely to further affect yield stability. Simulation modeling provides a powerful tool to investigate the interactive effects of abiotic factors and develop adaptive strategies; however, many of these models do not adequately account for the step change response to high temperature occurring during the crop reproductive phase. Empirical response data will support the development of robust algorithms for crop models. We present results from three experiments on the response of wheat to a range of acute high-temperature treatments. For 35, 37, and 42°C and 1, 3, and 5 d of exposure (~6 h d -1 ), expressed as heat sum, °C×h (above 32°C), high temperature applied 5 d prior to anthesis reduced grain number and yield by 0.16 and 0.15% per °C×h respectively, whereas individual grain weight and grain nitrogen concentration increased by 0.03 and 0.06% per °C×h, respectively. For high temperature applied after anthesis, individual grain weight decreased by 0.05% per °C×h, grain nitrogen concentration increased by 0.03% per °C×h, and yield was reduced by 0.07% per °C×h. The often asymptotic response meant exponential functions provided a superior fit. Water availability prior to anthesis attenuated wheat response to high temperature. Such algorithms could contribute to improving our prediction of the step change response of wheat to high temperature within crop models and more broadly contribute to developing strategies for crop adaptation to climate change using a modeling approach.

show abstract

Section: Discussionmentioning

confidence: 99%

Acute High Temperature Response in Wheat

et al. 2018

View full text Add to dashboard Cite

show abstract

“…FVs being climate resilient and resource efficient have greater role to play as these varieties do posses the adaptive traits required to breed abiotic stress tolerance varieties (Singh 2017a, Singh 2020. The development of multiple abiotic stress tolerance such as heat and drought is crucial to mitigate the extreme and adverse conditions due to increased climatic variability under marginal low input conditions (Singh et al 2011, Singh 2014). In addition, FVs do have comparatively higher nutritional contents in delicately balanced way and high yielding varieties along with higher nutritional contents is the need of the day as micronutrient malnutrition problems.…”

Section: Karnataka Pigeonpeamentioning

confidence: 99%

Farmers' varieties to increase nutritional security, eco-system resiliency and farmers' income

Singh

Agrawal

2021

Indian J Agri Sci

View full text Add to dashboard Cite

The successful development and deployment of widely adapted, photo-thermo insensitive and input responsive high yielding varieties (HYVs) in cereals along with required inputs and favorable policy reforms heralded green revolution (GR) in the country which changed India's status from food unsecured food secured and food surplus nation. However, HYVs displaced the locally adapted, climate resilient and resource efficient, but low yielding farmerâ€™s varieties (FVs) initially from the irrigated areas and later on from the risk prone, low input, marginal and rainfed areas but the HYVs/ hybrids could not replace FVs completely and FVs still occupy significant areas in different low input marginal areas and still providing valuable ecosystem's provisioning, regulating and cultural services. India being member of the World Trade Organization (WTO) adopted and implemented Trade Related Intellectual Property Rights (TRIPS) in the form of Protection of Plant Varieties and Farmers' Rights (PPV&FR) Act (2001) and Geographical Indications of Goods (Registration and Protection) Act (1999) known GIs to protect even FVs by providing PVP certificates and registered as Goods respectively by these legislations. FVs are also known to have special nutritional/medicinal/ therapeutic value in addition to adaptive traits have been protected either through PPV&FR Act or through GIs as Goods. Moreover, under GIs registration and protection FVs being having the heritage varietal status supposed to have high commercial values for trade like several kinds of Rice. Interestingly, in both legislative protections, Rice FVs dominate the scene. Virtually, the economical produce of FVs as Goods under GIs have domestic as well as international market and receive the premium prices. The FVs with special nutritional/aroma/medicinal traits with distinct identity and protected under PPV&FR Act, should also get higher economic returns if there is policy support by the Government. Currently, to mitigate the adverse effects due to climate change, breeding new varieties with specific instead of wide adaptation is advocated and the FVs by virtue of having specific adaptive traits as well as increased resource efficiency present themselves as ideal candidates for using as donors. The FVs can also be used for enhanced nutritional security as well as promoting agricultural trade to increase farmers' income.

show abstract

“…Based on their well-classified functional feeding groups, they assume feeding roles such as herbivores, carnivores, and even omnivores. Because of these attributes, soil nematode communities have been regarded as an excellent model system for studying soil health and the impacts of climate change on belowground productivity ( Singh and Prasad, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Diversity and population distribution of nematodes associated with honeybush (Cyclopia spp.) and rooibos (Aspalathus linearis) in the Western Cape province of South Africa

Daramola

Lewu

Malan

2021

Heliyon

View full text Add to dashboard Cite

Nematodes are important soil organisms that constitute a key component of the soil ecosystem. A plant-parasitic survey was conducted to identify the diversity of nematodes associated with two endemic tea plants, honeybush ( Cyclopia spp.) and rooibos ( Aspalathus linearis ) in the Western Cape province of South Africa. A total of 20 farmlands were surveyed and soil samples were collected from the rhizosphere of plants, for nematode isolation and identification based on morphological characters. Confirmation of the species of plant-parasitic nematodes was done using molecular-based tools. Nematodes were classified into various feeding groups based on their colonizer-persister (c-p) values. Plant-feeding nematodes identified from the honeybush tea plants include; Criconema mutabile , Meloidogyne hapla , M. javanica , and Xiphinema oxycaudatum , while Hoplolaimus sp., Neodolichorhynchus estherae and Pratylechus bolivianus were pathogenic on the rooibos monocultures. Bacterial and fungal feeders ( Cephalobidae and Rhabditidae ) were also abundant and frequently encountered in all samples. The study provides information on the diversity of nematodes associated with the indigenous herbal tea plants of South Africa.

show abstract

Impacts of High‐Temperature Stress and Potential Opportunities for Breeding

Cited by 7 publications

References 120 publications

Acute High Temperature Response in Wheat

Acute High Temperature Response in Wheat

Farmers' varieties to increase nutritional security, eco-system resiliency and farmers' income

Diversity and population distribution of nematodes associated with honeybush (Cyclopia spp.) and rooibos (Aspalathus linearis) in the Western Cape province of South Africa

Contact Info

Product

Resources

About