Challenges to developing native legume seed supplies: the Texas experience as a case study

Muir, James P.; Pitman, W. D.; Smith, Forrest S; Lloyd-Reilley, John; Shadow, R Alan

doi:10.3368/npj.19.3.224

Cited by 13 publications

(6 citation statements)

References 15 publications

(16 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…for multiple harvests increases the intensity of phenotyping. This phenotyping burden for biomass has been the major bottleneck for genetic improvement in alfalfa 19 .…”

mentioning

confidence: 99%

Validation of UAV-based alfalfa biomass predictability using photogrammetry with fully automatic plot segmentation

Tang

Parajuli

Chen

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Alfalfa is the most widely cultivated forage legume, with approximately 30 million hectares planted worldwide. Genetic improvements in alfalfa have been highly successful in developing cultivars with exceptional winter hardiness and disease resistance traits. However, genetic improvements have been limited for complex economically important traits such as biomass. One of the major bottlenecks is the labor-intensive phenotyping burden for biomass selection. In this study, we employed two alfalfa fields to pave a path to overcome the challenge by using UAV images with fully automatic field plot segmentation for high-throughput phenotyping. The first field was used to develop the prediction model and the second field to validate the predictions. The first and second fields had 808 and 1025 plots, respectively. The first field had three harvests with biomass measured in May, July, and September of 2019. The second had one harvest with biomass measured in September of 2019. These two fields were imaged one day before harvesting with a DJI Phantom 4 pro UAV carrying an additional Sentera multispectral camera. Alfalfa plot images were extracted by GRID software to quantify vegetative area based on the Normalized Difference Vegetation Index. The prediction model developed from the first field explained 50–70% (R Square) of biomass variation in the second field by incorporating four features from UAV images: vegetative area, plant height, Normalized Green–Red Difference Index, and Normalized Difference Red Edge Index. This result suggests that UAV-based, high-throughput phenotyping could be used to improve the efficiency of the biomass selection process in alfalfa breeding programs.

show abstract

“…for multiple harvests increases the intensity of phenotyping. This phenotyping burden for biomass has been the major bottleneck for genetic improvement in alfalfa 19 .…”

mentioning

confidence: 99%

Validation of UAV-based alfalfa biomass predictability using photogrammetry with fully automatic plot segmentation

Tang

Parajuli

Chen

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The introduction of greater diversity in cropping systems through biotypes for mixed cultivation (“ideomixes”), with high resource-use complementarity, is also used as a novel approach by breeders ( Litrico and Violle, 2015 ). For forage purposes, the domestication of shrub-tree legumes for livestock production has the potential not only to enhance productivity, but it could also provide multiple environmental benefits, such as providing shade for cattle, restoring degraded lands and mitigating greenhouse gas (GHG) emissions ( Muir et al, 2018 ). The concept of the traditional ideotype in marginal environments needs to be discussed, and the ecosystem services of these should be considered ( Duc et al, 2015 ).…”

Section: Desirable Crop Wild Relatives Phenotypic Traits To Improve C...mentioning

confidence: 99%

How Could the Use of Crop Wild Relatives in Breeding Increase the Adaptation of Crops to Marginal Environments?

et al. 2022

View full text Add to dashboard Cite

Alongside the use of fertilizer and chemical control of weeds, pests, and diseases modern breeding has been very successful in generating cultivars that have increased agricultural production several fold in favorable environments. These typically homogeneous cultivars (either homozygous inbreds or hybrids derived from inbred parents) are bred under optimal field conditions and perform well when there is sufficient water and nutrients. However, such optimal conditions are rare globally; indeed, a large proportion of arable land could be considered marginal for agricultural production. Marginal agricultural land typically has poor fertility and/or shallow soil depth, is subject to soil erosion, and often occurs in semi-arid or saline environments. Moreover, these marginal environments are expected to expand with ongoing climate change and progressive degradation of soil and water resources globally. Crop wild relatives (CWRs), most often used in breeding as sources of biotic resistance, often also possess traits adapting them to marginal environments. Wild progenitors have been selected over the course of their evolutionary history to maintain their fitness under a diverse range of stresses. Conversely, modern breeding for broad adaptation has reduced genetic diversity and increased genetic vulnerability to biotic and abiotic challenges. There is potential to exploit genetic heterogeneity, as opposed to genetic uniformity, in breeding for the utilization of marginal lands. This review discusses the adaptive traits that could improve the performance of cultivars in marginal environments and breeding strategies to deploy them.

show abstract

“…Increasing its presence in areas undergoing restoration may prevent alterations of the native rhizosphere that facilitate Guinea grass reinvasion (Zhang et al, 2019). Partridge pea is a nitrogen‐fixing legume that may facilitate native establishment by alleviating nutrient limitations in grasslands (Muir et al, 2018). We recommend considering the functional guild of restoration candidates and screening their recruitment and performance with an experiment before committing resources to the restoration of land degraded by an invasive species.…”

Section: Discussionmentioning

confidence: 99%

Adding insult to injury: Light competition and allelochemical weapons interact to facilitate grass invasion

et al. 2023

View full text Add to dashboard Cite

Biological invasions are a leading ecological issue of the 21st century because of their worldwide contributions to biodiversity loss and degradation of ecosystem services. Answering general questions about the mechanisms facilitating the spread of successful invasives is key to understanding how to manage them moving forward. The success of introduced primary producers has often been attributed to superior competitive ability or to their release from natural enemies that constrained them in their native range. In contrast, nonnative primary producers can successfully invade and establish in new areas by releasing allelochemical compounds into the environment that are toxic to the native flora. The interactive effects of allelopathy and competition remain underexplored. Here, we evaluated the mechanism of invasion by Guinea grass, a globally distributed tallgrass from tropical and subtropical Africa with known allelopathic effects associated with 2-hydroxyphenylacetic acid (2HPAA). We asked if allelopathy and light availability interact to give Guinea grass a competitive advantage during seedling establishment in its introduced range. We used a fully factorial greenhouse experiment in which allelochemical concentrations and light availability treatments were based on empirical measurements of these variables at an invaded site in South Texas. Seedling recruitment and growth were assessed for three native species and for Guinea grass itself. We also described the metabolome (the complete set of small molecules) of an invasive grass for the first time to facilitate a comparison of the effect of the known allelochemical 2HPAA with that of the whole-plant chemical extract. Shading and allelochemistry each reduced recruitment and growth by themselves, and a significant interaction of these stressors exacerbated the negative effects in the shade, resulting in short plants, low biomass, and ultimately decreased seedling recruitment. The whole-plant metabolomic extract had significantly stronger effects than pure 2HPAA, and these negative effects were intensified in

show abstract

Challenges to developing native legume seed supplies: the Texas experience as a case study

Cited by 13 publications

References 15 publications

Validation of UAV-based alfalfa biomass predictability using photogrammetry with fully automatic plot segmentation

Validation of UAV-based alfalfa biomass predictability using photogrammetry with fully automatic plot segmentation

How Could the Use of Crop Wild Relatives in Breeding Increase the Adaptation of Crops to Marginal Environments?

Adding insult to injury: Light competition and allelochemical weapons interact to facilitate grass invasion

Contact Info

Product

Resources

About