High-biomass C 4 grasses—Filling the yield gap

Mullet, John E.

doi:10.1016/j.plantsci.2017.05.003

Cited by 25 publications

(18 citation statements)

References 65 publications

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“…However, they presented on average 23.37 t•ha -1 of DMY, below the desired level of around 50 t•ha -1 (Parrella et al 2010). This low performance of biomass sorghum hybrids is also found in the literature (Rooney et al 2007;Silva et al 2015;Mullet 2017), what reinforce the need of improvement of this crop to obtain better genotypes.…”

Section: Sults and Discussionsupporting

confidence: 70%

“…Biplots of the scores associated with two first PC were generated to better understanding the interrelationship (Table 1). This has been highlighted in other studies with biomass sorghum (Castro et al 2015), as well as other types of sorghum, as sweet sorghum (Figueiredo et al 2015), forage sorghum (Mullet 2017) and grain sorghum (Batista et al 2017).…”

Section: Sults and Discussionmentioning

confidence: 66%

“…Biomass sorghum presents a promising feedstock for energy cogeneration because it exhibits productivities up to 150 Mg.ha -1 of fresh mass in a cycle of only five months with entirely mechanized cultivation process (Rooney et al 2007;Mullet 2017). Public or private breeding programs for biomass sorghum are relatively recent.…”

Section: Introductionmentioning

confidence: 99%

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Genotype by environment interaction and adaptability of photoperiod-sensitive biomass sorghum hybrids

et al. 2019

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Biomass sorghum is an alternative feedstock to cogenerate energy and produce second-generation ethanol. The aim of this study was to evaluate the Genotype by Environment Interaction (GEI) in biomass sorghum and to identify the hybrids that associate high adaptability and stability using the Toler nonlinear regression, the Genotypes plus Genotype by Environment (GGE) biplot, and the Annicchiarico recommendation index. Thirty-three experimental photoperiod-sensitive single-cross hybrids and three checks were evaluated in relation to the traits: flowering time, plant height, moisture content, green mass yield, and dry mass yield. It PLANT BREEDING -Article was observed that the effects of hybrids, environment, and GEI were expressive. The GEI was predominantly complex for the traits related to the biomass yield. The Toler, GGE biplot and Annicchiarico methods show complementarity. The experimental hybrids 1, 8, 22, 31 and 33 are promising because of associating stability and lower recommendation risk. The hybrids 1 and 8 present broad adaptability, while the hybrids 22, 31 and 33 exhibit specific adaptability to high quality environments.

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Section: Sults and Discussionsupporting

confidence: 70%

Section: Sults and Discussionmentioning

confidence: 66%

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Genotype by environment interaction and adaptability of photoperiod-sensitive biomass sorghum hybrids

et al. 2019

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“…Recessive alleles at each of the six Ma loci reduces photoperiod sensitivity [30,31,58]. Molecular identification of the genes corresponding to Ma 1 , Ma 3 , Ma 5 and Ma 6 and other genes in the sorghum flowering time pathway (i.e., SbCO, SbEHD1, SbCN8/12 ) and an understanding of their regulation by photoperiod and the circadian clock led to the model of the flowering time pathway shown in Figure 7 [60]. The current study showed that Ma 2 represses flowering in long days by increasing the expression of SbPRR37 ( Ma 1 ) and SbCO .…”

Section: Discussionmentioning

confidence: 99%

Maturity2, a novel regulator of flowering time in Sorghum bicolor, increases expression of SbPRR37 and SbCO in long days delaying flowering

Casto

Mattison

Olson

et al. 2019

Preprint

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Sorghum bicolor is a drought-resilient facultative short-day C4 grass that is grown for grain, forage, and biomass. Adaptation of sorghum for grain production in temperate regions resulted in the selection of mutations in Maturity loci (Ma1 – Ma6) that reduced photoperiod sensitivity and resulted in earlier flowering in long days. Prior studies identified the genes associated with Ma1 (PRR37), Ma3 (PHYB), Ma5 (PHYC) and Ma6 (GHD7) and characterized their role in the flowering time regulatory pathway. The current study focused on understanding the function and identity of Ma2. Ma2 delayed flowering in long days by selectively enhancing the expression of SbPRR37 (Ma1) and SbCO, genes that co-repress the expression of SbCN12, a source of florigen. Genetic analysis identified epistatic interactions between Ma2 and Ma4 and located QTL corresponding to Ma2 on SBI02 and Ma4 on SBI10. Positional cloning and whole genome sequencing identified a candidate gene for Ma2, Sobic.002G302700, which encodes a SET and MYND (SYMD) domain lysine methyltransferase. Nine sorghum genotypes previously identified as recessive for Ma2 contained the mutated version of Sobic.002G302700 present in 80M (ma2).

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“…Preeminent examples are the LG1 and LG2 loci of maize, that, once mutated, induce upright leaves lacking of ligules and auricles, allowing for higher planting densities (Tian et al, 2011). Alternatively, four DWARF loci (DW1-DW4) largely control internode length -and therefore plant height -in sorghum in a pure Mendelian fashion (Hilley et al, 2016;Mullet, 2017).…”

Section: Efficiency Of Light Interceptionmentioning

confidence: 99%

Marginal Lands to Grow Novel Bio-Based Crops: A Plant Breeding Perspective

Pancaldi

Trindade

2020

Front. Plant Sci.

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The biomass demand to fuel a growing global bio-based economy is expected to tremendously increase over the next decades, and projections indicate that dedicated biomass crops will satisfy a large portion of it. The establishment of dedicated biomass crops raises huge concerns, as they can subtract land that is required for food production, undermining food security. In this context, perennial biomass crops suitable for cultivation on marginal lands (MALs) raise attraction, as they could supply biomass without competing for land with food supply. While these crops withstand marginal conditions well, their biomass yield and quality do not ensure acceptable economic returns to farmers and cost-effective biomass conversion into bio-based products, claiming genetic improvement. However, this is constrained by the lack of genetic resources for most of these crops. Here we first review the advantages of cultivating novel perennial biomass crops on MALs, highlighting management practices to enhance the environmental and economic sustainability of these agro-systems. Subsequently, we discuss the preeminent breeding targets to improve the yield and quality of the biomass obtainable from these crops, as well as the stability of biomass production under MALs conditions. These targets include crop architecture and phenology, efficiency in the use of resources, lignocellulose composition in relation to bio-based applications, and tolerance to abiotic stresses. For each target trait, we outline optimal ideotypes, discuss the available breeding resources in the context of (orphan) biomass crops, and provide meaningful examples of genetic improvement. Finally, we discuss the available tools to breed novel perennial biomass crops. These comprise conventional breeding methods (recurrent selection and hybridization), molecular techniques to dissect the genetics of complex traits, speed up selection, and perform transgenic modification (genetic mapping, QTL and GWAS analysis, marker-assisted selection, genomic selection, transformation protocols), and novel high-throughput phenotyping platforms. Furthermore, novel tools to transfer genetic knowledge from model to orphan crops (i.e., universal markers) are also conceptualized, with the belief that their development will enhance the efficiency of plant breeding in orphan biomass crops, enabling a sustainable use of MALs for biomass provision.

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High-biomass C 4 grasses—Filling the yield gap

Cited by 25 publications

References 65 publications

Genotype by environment interaction and adaptability of photoperiod-sensitive biomass sorghum hybrids

Genotype by environment interaction and adaptability of photoperiod-sensitive biomass sorghum hybrids

Maturity2, a novel regulator of flowering time in Sorghum bicolor, increases expression of SbPRR37 and SbCO in long days delaying flowering

Marginal Lands to Grow Novel Bio-Based Crops: A Plant Breeding Perspective

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