Echinochloa colona and Echinochloa crus-galli

Rao, A.N.

doi:10.1016/b978-0-12-822917-0.00013-6

Cited by 5 publications

(2 citation statements)

References 127 publications

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“…Additionally, the EB-SILs recorded the highest increase in root length among all the lines, ranging from 8. 33…”

Section: Esg Performance Of Parental Lines and Eb-silsmentioning

confidence: 99%

Genome-Wide Dissection of Novel QTLs and Genes Associated with Weed Competitiveness Traits Using a Population of Early-Backcross Selective Introgression Lines of Rice (Oryza sativa L.)

Nocito,

Murugaiyan,

Ali

et al. 2024

Preprint

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Background Direct-seeded rice (DSR) system is anticipated to become the dominant rice cultivation method in the coming years due to its advantages, such as reduced water usage and labor requirements, less greenhouse gas emission, and adaptation to climate change risks. However, weeds are a significant constraint in the DSR system due to the yield losses incurred by weed infestations. Developing rice cultivars that are competitive against weeds through selective breeding has great potential to solve this challenge. Early seed germination (ESG) and seedling vigor (ESV) are important characteristics for the competitive ability of rice against weeds. This study used 181 early-backcross selective introgression-breeding lines (EB-SILs) that were generated by the process of backcrossing Weed Tolerant Rice 1 (WTR 1) with three specific donor parents (Haoannong, Cheng Hui 448, and Y134). Using the tunable genotyping-by-sequencing (tGBS®) method, we obtained 3,971 single nucleotide polymorphisms (SNPs). These SNPs were then utilized to identify and map quantitative trait loci (QTLs) associated with ESG and ESV features using their precise physical positions. Results High phenotypic variations among the EB-SILs and parental lines in different ESG- and ESV-related traits were observed. The association between the phenotypic and genotypic data detected 18 QTLs governing weed competitiveness, with eight and ten QTLs associated with the ESG and ESV traits, respectively. All detected QTLs were novel, except qRPH1, associated with relative plant height at 14 and 21 days after sowing (DAS). Four ESG-related QTLs (qRL2, qTDWG2, qSVI2.1, and qSVI2.1) were detected on chromosome 2, with two more QTLs governing germination rate (qGR12) and seed vigor index (qSVI12) identified on chromosome 12, and additional QTLs for seed vigor index found on chromosome 3 (qSVI3) and 6 (qSVI6). For ESV traits, qRPH1 detected on chromosome 1 was linked with relative plant height at 14 DAS and 28 DAS, while chromosome 10 harbored four QTLs (qRLC10.1, qRLC10.2, qRTN10, and qRRL10) associated with relative leaf count, relative tiller number, and relative root length at 28 DAS. Additionally, QTLs were detected for relative plant height at 21 DAS on chromosomes 5 and 9 (qRPH5 and qRPH9), relative leaf count at 28 DAS on chromosome 4 (qRLC4), relative tiller number at 28 DAS on chromosome 3 (qRTN3), and relative root length at 28 DAS on chromosome 8 (qRRL8). Candidate genes discovered within the identified QTLs were responsible for the plant’s response to various abiotic and biotic stresses. Conclusion This study provides a more profound comprehension of the genetic foundation of ESG and ESV traits, which are essential characteristics for the weed competitiveness of rice. The novel QTLs and candidate genes found have the potential to aid in marker-assisted and genomic selection approaches for breeding rice varieties with enhanced weed competitiveness. Simultaneously, the potential genes might be further examined to determine their expression patterns when subjected to intense weed pressure. The findings of this research will contribute to the development of rice varieties capable of competing with weeds. These varieties will be crucial in integrated weed management within the DSR system.

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“…Additionally, the EB-SILs recorded the highest increase in root length among all the lines, ranging from 8. 33…”

Section: Esg Performance Of Parental Lines and Eb-silsmentioning

confidence: 99%

Genome-Wide Dissection of Novel QTLs and Genes Associated with Weed Competitiveness Traits Using a Population of Early-Backcross Selective Introgression Lines of Rice (Oryza sativa L.)

Nocito,

Murugaiyan,

Ali

et al. 2024

Preprint

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“…Owing to the regional and global economic relevance of Echinochloa , the basic biology, interference in cropping systems, and management techniques have been thoroughly reviewed since the 1960s (Bajwa et al 2015; Maun and Barrett 1986; Rahn et al 1968; Rao 2021). Additionally, molecular analyses have provided recent insights into its evolution as a weed (Guo et al 2017; Wu et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Echinochloa in mid-southern U.S. and California rice: What is known and what are the knowledge gaps?

Godar

Norsworthy

2023

Weed Technol

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Several Echinochloa P. Beauv. species, introduced at multiple events, have established themselves as a persistent concern for US rice production. In this review, we highlight the key biological characteristics of economically relevant Echinochloa in US rice, revisit their historical trajectory, and put forward research directions for their management with special reference to barnyardgrass. Ecologically-differentiated Echinochloa species have a distinct association with rice culture methods that have been practiced in a region, barnyardgrass being historically predominant in drill-seeded rice in the mid-South, and early watergrass and late watergrass in water-seeded California rice for the last few decades. However, the emerging evidence challenges the dogma that other Echinochloa species for the specific regions are of less importance. Primarily managed by the water-seeding method of rice culture in the early years, Echinochloa species have persisted in the sophisticated US rice culture through the evolution of resistance to herbicides in the later course. Accumulating knowledge, including those of recent genomic insights, suggests the rapid adaptability of Echinochloa. The last decade has seen a (re)emergence of non-chemical methods as a key component of a sustainable management approach, among which use of harvest weed seed control (HWSC) methods and cover crops in the mid-South and stale-drill seeding in California are being considered as potential tools for management of Echinochloa. In recent years, furrow-irrigated rice has rapidly supplanted a significant proportion of conventionally flooded rice in the mid-South, whereas the propensity for compromised continuous submergence is increasing in California rice. On the cusp of this shift, the question at the forefront is how this will affect Echinochloa interference in rice and how this change will dictate the management efforts. Future research will develop a clear understanding of the impact of the changing agroecosystems on Echinochloa species as well as their response to the prospective integrated control interventions.

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Volatolomics to Decrypt the Monophagous Nature of a Rice Pest, Scirpophaga Incertulas (Walker)

Adak,

Mahanty,

Jena

et al. 2024

J Chem Ecol

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Echinochloa colona and Echinochloa crus-galli

Cited by 5 publications

References 127 publications

Genome-Wide Dissection of Novel QTLs and Genes Associated with Weed Competitiveness Traits Using a Population of Early-Backcross Selective Introgression Lines of Rice (Oryza sativa L.)

Genome-Wide Dissection of Novel QTLs and Genes Associated with Weed Competitiveness Traits Using a Population of Early-Backcross Selective Introgression Lines of Rice (Oryza sativa L.)

Echinochloa in mid-southern U.S. and California rice: What is known and what are the knowledge gaps?

Volatolomics to Decrypt the Monophagous Nature of a Rice Pest, Scirpophaga Incertulas (Walker)

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