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Siphoning novel sources of seedling salinity tolerance from the diverse chickpea landraces 从鹰嘴豆地方品种中提取耐盐苗木新来源
IF 1.9 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2023-03-14 DOI: 10.1071/CP22319
N. Joshi, Sneha Priya Pappula Reddy, Neeraj Kumar, C. Bharadwaj, K. Tapan, B. S. Patil, P. Jain, N. M. S., Manish Roorkiwal, P. Verma, R. Varshney, K. Siddique, S. K
ABSTRACT Context. Chickpea (Cicer arietinum L.) are highly sensitive to elevated salinity, particularly at initial seedling establishment stage. Seedling screening would be an effective means to identify novel sources of donors for salt tolerance. Aim.This study aimed to identify salt stress tolerant genotypes at seedling stage from 50 chickpea accessions. Methods. The screening of 50 chickpea accessions was done under two salinity conditions including salt stress (8 dS m−1) and control (no salt stress). Accessions were studied for morphological traits, root system architectural analysis, and CSTI (Cumulative salt tolerance index). Further, principal component analysis was conducted to validate these results for more accuracy and reliability. Key results. For morphological traits, a high degree of genetic variation was seen among genotypes, and root traits were found to be the better indicators of salt stress tolerance. CSTI was used to classify the accessions; 22 (44%) were identified as salt sensitive, 21 (42%) were found to be moderately salt tolerant, and 7 (14%) had moderate to high salt tolerance. The most salt tolerant and salt sensitive genotypes were found to be ICCV10 and ILC5595, respectively. Conclusions. Early seedling screening has a great potential to identify genotypes with robust root systems, which can withstand salinity. Implications. We used a novel approach to classify chickpea landraces based on the combination of CSTI and principal component analysis methods. By choosing suitable donors and prospective genotypes at early growth stages, the knowledge gathered from this study may aid scientists and chickpea breeders in developing salt tolerant cultivars.
抽象的上下文。鹰嘴豆(Cicer arietinum L.)对高盐度非常敏感,特别是在幼苗建立初期。苗木筛选将是鉴定耐盐供体新来源的有效手段。的目标。本研究旨在鉴定50份鹰嘴豆苗期耐盐基因型。方法。选取50份鹰嘴豆材料,在盐胁迫(8 dS m−1)和对照(无盐胁迫)两种盐胁迫条件下进行筛选。对材料进行了形态性状、根系结构分析和累积耐盐指数研究。进一步,进行主成分分析验证这些结果,以提高准确性和可靠性。关键的结果。在形态性状方面,基因型间存在较大的遗传变异,根系性状是耐盐性的较好指标。采用CSTI对资料进行分类;22株(44%)为盐敏感,21株(42%)为中等耐盐,7株(14%)为中高耐盐。ICCV10和ILC5595分别是耐盐性最强和盐敏感性最强的基因型。结论。早期幼苗筛选对于鉴定出具有耐盐根系的基因型具有很大的潜力。的影响。本文提出了一种基于CSTI和主成分分析相结合的鹰嘴豆地方品种分类方法。通过在生长早期选择合适的供体和预期的基因型,本研究收集的知识可能有助于科学家和鹰嘴豆育种者培育耐盐品种。
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引用次数: 1
Development of low-phytate maize inbred lines through marker-assisted introgression of lpa1 标记辅助导入lpa1培育低植酸酶玉米自交系
IF 1.9 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2023-03-14 DOI: 10.1071/CP22238
K. R. Yathish, Chikkappa Gangadhar Karjagi, S. S. Gangoliya, R. N. Gadag, M. Mallikarjuna, J. C. Sekhar, A. Das, P. Lakshmi Soujanya, R. Kumar, Alla Singh, S. Singh, S. Rakshit
ABSTRACT Context. Phytic acid is the major storage form of phosphorus in cereals and is considered an anti-nutritional factor because it chelates major mineral micronutrient cations, resulting in micronutrient malnutrition in humans. For monogastric animals fed maize (Zea mays L.) grains, the stored phosphorus does not release into the digestive tract, leading to phosphorus deficiency and environmental pollution. Aims. The aim of the study was to develop maize lines with a lower level of phytic acid that might substantially enhance the nutritional value of maize. Methods. The lpa1 mutant allele conferring low phytic acid was transferred into the parental lines of popular maize hybrid DMH 121 (i.e. BML 6 and BML 45) through marker-assisted backcross breeding. Foreground selection was performed using a co-dominant single nucleotide polymorphism marker through a high-resolution melting approach, and background selection was undertaken using 50–55 polymorphic sequence-tagged microsatellite site markers. Key results. Near-isogeneic lines were produced with >90% recurrent parental genome and reduction of phytic acid content by up to 44–56% compared with the original lines. Conclusions. The near-isogeneic lines carrying lpa1 can be used to reconstitute DHM 121 with low phytate content. Implications. The low-phytate maize hybrids produced can be useful in reducing micronutrient malnutrition in humans, as well as environmental pollution.
摘要上下文。Phytic acid是谷物中磷的主要储存形式,被认为是一种抗营养因子,因为它螯合了主要的矿物质微量营养素阳离子,导致人类微量营养素营养不良。对于喂食玉米(Zea mays L.)谷物的单胃动物,储存的磷不会释放到消化道中,导致磷缺乏和环境污染。目标。本研究的目的是开发具有较低水平的植酸的玉米品系,这可能会大大提高玉米的营养价值。方法。通过标记辅助回交育种,将具有低植酸的lpa1突变等位基因转移到玉米杂交种DMH121(即BML6和BML45)的亲本系中。通过高分辨率熔解方法,使用共显性单核苷酸多态性标记进行前景选择,使用50-55个多态性序列标记的微卫星位点标记进行背景选择。关键成果。产生的近等基因系具有>90%的重复亲本基因组,并且与原始系相比,植酸含量减少了高达44–56%。结论。携带lpa1的近等基因系可用于重组具有低植酸酶含量的DHM121。含义。生产的低植酸酶玉米杂交种可用于减少人类微量营养素营养不良和环境污染。
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引用次数: 0
Whither digital agriculture in India? 印度数字农业何去何从?
IF 1.9 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2023-03-08 DOI: 10.1071/CP21624
R. Goswami, S. Dutta, Sanchayeeta Misra, S. Dasgupta, S. Chakraborty, Kousik Mallick, A. Sinha, V. Singh, T. Oberthür, S. Cook, K. Majumdar
ABSTRACT Agriculture is central to the Indian economy and suffers from widespread operational inefficiencies that could be corrected by the use of digital agriculture technologies (DA). We review and synthesise available literature concerning digital agriculture in India and anticipate its transformative potential in the coming decade. Although the initial growth of DA was more conspicuous in the downstream sectors and high-value crops, reaching smallholder farmers upstream is slowly emerging despite significant obstacles such as small fragmented holdings, inadequate data infrastructure and public policy, and unequal access to digital infrastructure. Agri-tech enables innovation at many locations within value chains, and a steady shift is occurring in change from individual farms to the whole value chain. Technology in the sector is progressing from information and communication technology-based solutions to Internet of Things and artificial intelligence–machine learning-enabled services. India’s public policy shows signs of a longstanding investment and collaboration in the sector, with an explicit focus on data infrastructure development. We find smallholder predominance, diversity in production systems, the predominance of commodity crops, proximity to urban markets, and public policy as the major factors of DA’s success in India. A stocktake of the available technologies and their applications by the public sector, tech giants, information technology leaders and agri-food tech startups in India strongly indicates a digital transformation of Indian agriculture. However, given the federal structure of governance and agriculture being a state (province) subject, we need to wait to see how DA policies are rolled out and taken up across the country.
摘要农业是印度经济的核心,普遍存在运营效率低下的问题,可以通过使用数字农业技术来纠正。我们回顾并综合了有关印度数字农业的现有文献,并预测了其在未来十年的变革潜力。尽管DA的最初增长在下游部门和高价值作物中更为明显,但尽管存在大量障碍,如持有量小、数据基础设施和公共政策不足以及数字基础设施获取不平等,但向上游小农户的普及仍在缓慢出现。农业技术使价值链中的许多地方都能实现创新,从单个农场到整个价值链的变化正在稳步转变。该行业的技术正在从基于信息和通信技术的解决方案发展到物联网和人工智能——机器学习服务。印度的公共政策显示出在该行业进行长期投资和合作的迹象,明确关注数据基础设施的发展。我们发现,小农优势、生产系统的多样性、商品作物的优势、靠近城市市场以及公共政策是DA在印度取得成功的主要因素。印度公共部门、科技巨头、信息技术领导者和农业食品科技初创公司对现有技术及其应用的总结有力地表明了印度农业的数字化转型。然而,鉴于联邦治理结构和农业是州(省)的主体,我们需要等待DA政策如何在全国推广和实施。
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引用次数: 1
Vernalisation and photoperiod responses of diverse wheat genotypes 不同小麦基因型春化和光周期响应
IF 1.9 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2023-03-08 DOI: 10.1071/CP22213
Maxwell T. Bloomfield, C. Celestina, J. Hunt, N. Huth, B. Zheng, H. Brown, Zhigan Zhao, E. Wang, K. Stefanova, J. Hyles, Tina M. Rathjen, B. Trevaskis
Abstract Context. Wheat (Triticum aestivum L.) adaptation is highly dependent on crop lifecycle duration, particularly the time at which flowering occurs in a specific environment. Frost, low solar radiation, heat and drought can significantly reduce yield if a crop flowers too early or late. Wheat genotypes have different lifecycle durations determined by plant responses to temperature (thermal time accumulation and vernalisation) and photoperiod. These responses are largely controlled by five phenology genes (two PPD1 and three VRN1 genes). Advances in crop phenology modelling suggest that flowering time under field conditions could be accurately predicted with parameters derived from photoperiod and vernalisation responses obtained in controlled environments. Aims. This study quantified photoperiod and vernalisation responses of 69 Australian wheat genotypes selected for diversity at the PPD1 and VRN1 loci. Methods. Spring and winter genotypes were grown in four controlled environments at a constant temperature of 22°C with photoperiod (17 or 8 h) and vernalisation (0 or 8 weeks) treatments as factors. Key results. Thermal time from coleoptile emergence to flowering in spring genotypes was typically decreased more by long photoperiod than by vernalisation; the opposite was true for winter genotypes. Spring genotypes that were sensitive to vernalisation contained a sensitive allele at the Vrn-A1 locus. Conclusions. There is large diversity in phenological responses of wheat genotypes to photoperiod and vernalisation, including among those with matching multi-locus genotype. Implications. Data from this study will be used to parameterise and test a wheat phenology model in a future study.
抽象的上下文。小麦(Triticum aestivum L.)的适应性高度依赖于作物生命周期的持续时间,特别是在特定环境中开花的时间。如果作物开花过早或过晚,霜冻、低太阳辐射、高温和干旱都会显著降低产量。小麦基因型具有不同的生命周期,这取决于植物对温度(热时间积累和春化)和光周期的响应。这些反应主要由5个物候基因(2个PPD1和3个VRN1基因)控制。作物物候模型的进展表明,在受控环境下,根据光周期和春化反应获得的参数可以准确预测田间条件下的开花时间。目标本研究量化了69个澳大利亚小麦基因型在PPD1和VRN1位点上的光周期和春化反应。方法。春、冬两种基因型在4种受控环境中生长,温度为22°C,以光周期(17或8 h)和春化(0或8周)处理为影响因素。关键的结果。在春季基因型中,从胚芽萌发到开花的热时间通常由较长的光周期缩短而不是由春化缩短;冬季基因型则相反。对春化敏感的春基因型在Vrn-A1位点含有一个敏感等位基因。结论。小麦基因型对光周期和春化的物候反应存在很大差异,包括具有匹配的多位点基因型。的影响。这项研究的数据将在未来的研究中用于参数化和测试小麦物候模型。
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引用次数: 1
Tillage, crop establishment and residue retention methods for optimising productivity and profitability under rice–wheat system 稻麦系统下优化生产力和效益的耕作、作物种植和残茬保留方法
IF 1.9 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2023-03-08 DOI: 10.1071/CP21595
H. S. Thind, Sandeep Sharma, H. S. Sidhu, Vicky Singh, Yadvinder-Singh
ABSTRACT Conventional tillage and crop establishment methods for the rice–wheat (RW) system are input intensive (water, labour and energy). About 24.5 million tonnes of rice residues are burnt every year on farms in north-western India before sowing of wheat, causing air pollution and soil health degradation. Therefore, alternative tillage, crop establishment and residue management practices are needed for long-term sustainability of the RW system. A 4-year field study evaluated four tillage and crop establishment methods in rice (in main plots) and three tillage and rice residue management methods in wheat (in subplots) for their effects on yield, soil fertility, and profitability of the RW system. Average rice yields were similar under conventional puddled transplanted rice (PTR) and conventional till dry seeder rice (CTDSR). Both of these treatments produced significantly greater yields (10–16%) compared with zero till DSR (ZTDSR) and ZT machine transplanted rice in non-puddled soil, respectively, regardless of tillage and straw management methods in the previous wheat crop. Wheat yields in ZT wheat (ZTW) with 100% surface retention of rice residue (+R) were significantly greater than conventional till without residue retention after 2 years of experimentation, and accompanied by significant increases in macro-nutrient (potassium) availability in soil. The ZTW−R (no residue) treatment produced 15% lower wheat yield than ZTW+R. System yield was highest in CTDSR-ZTW+R, which was 5% higher than the conventional practice PTR-CTW−R, resulting in Rs 17 000 ha−1 greater net returns.
稻麦(RW)系统的传统耕作和作物种植方法是投入密集型的(水、劳动力和能源)。在印度西北部,每年大约有2450万吨水稻秸秆在播种小麦之前被焚烧,造成空气污染和土壤健康退化。因此,替代耕作、作物种植和残留物管理实践对于RW系统的长期可持续性是必要的。一项为期4年的实地研究评估了水稻(主地块)的四种耕作和作物种植方法以及小麦(子地块)的三种耕作和水稻秸秆管理方法对RW系统的产量、土壤肥力和盈利能力的影响。常规水田插秧稻(PTR)和常规干播稻(CTDSR)的平均产量相近。与以前的小麦作物耕作和秸秆管理方式相比,这两种处理的产量(10-16%)分别显著高于零耕DSR (ZTDSR)和ZT机插水稻在无水坑土壤中的产量(10-16%)。试验2年后,100%稻渣(+R)残留的ZT小麦(ZTW)产量显著高于不残留稻渣的常规耕作,且土壤中大量养分(钾)有效性显著提高。与ZTW+R处理相比,ZTW−R处理的小麦产量降低了15%。CTDSR-ZTW+R的体系产量最高,比传统的PTR-CTW - R高出5%,净收益增加17000公顷。
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引用次数: 3
Strawberry clover (Trifolium fragiferum): current status and future role in Australian agriculture 草莓三叶草(Trifolium fragiferum):在澳大利亚农业中的现状和未来作用
IF 1.9 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2023-03-07 DOI: 10.1071/CP22301
R. Smith, B. Penrose, A. Langworthy, A. Humphries, C. Harris, M. Rogers, P. G. H. Nichols, R. Hayes
ABSTRACT Strawberry clover (Trifolium fragiferum L.) is periodically raised as an alternative perennial pasture legume for temperate regions of Australia. Its tolerance of waterlogging is widely known, yet its ability to persist through periods of soil moisture deficit is often understated. Other desirable characteristics include its stoloniferous growth habit and tolerance of mildly saline conditions. Only four strawberry clover cultivars have been registered in Australia, and the most popular, cv. Palestine, is a direct introduction, released in 1938 and first certified in 1951. Furthermore, strawberry clover’s distribution has largely been confined to niche environments, particularly waterlogged and saline areas. This paper reviews the taxonomy and breeding system, morphology, distribution and ecology, and subsequent transfer of strawberry clover to Australia. It reviews and maps the suitability of strawberry clover for perennial pasture systems in the medium–-high rainfall and irrigated temperate zones of Australia, with reference to future climates. The paper also highlights the breeding focus, commercialisation and marketing required to supersede cv. Palestine and lists the germplasm available in the Australian Pastures Genebank, with origins. We conclude that, although strawberry clover is unlikely to become a dominant perennial pasture legume species in Australia, it could be used in a wider range of environments than just those affected by salinity and/or waterlogging stress.
摘要草莓三叶草(Trifolium fragiferum L.)是澳大利亚温带地区的一种替代多年生牧草。它对内涝的耐受性是众所周知的,但它在土壤水分不足时期持续存在的能力往往被低估。其他可取的特征包括其匍匐茎生长习惯和对轻度盐碱条件的耐受性。只有四个草莓三叶草品种在澳大利亚注册,最受欢迎的品种巴勒斯坦是直接引进的,于1938年发布,1951年首次获得认证。此外,草莓三叶草的分布在很大程度上局限于生态位环境,特别是积水和盐碱地区。本文综述了草莓三叶草的分类和育种系统、形态、分布和生态学,以及随后转移到澳大利亚的情况。它审查并绘制了草莓三叶草在澳大利亚中高降雨量和灌溉温带多年生牧场系统中的适用性,并参考了未来的气候。该论文还强调了取代巴勒斯坦品种所需的育种重点、商业化和营销,并列出了澳大利亚牧场基因库中的可用种质及其来源。我们得出的结论是,尽管草莓三叶草不太可能成为澳大利亚主要的多年生牧场豆类物种,但它可以在更广泛的环境中使用,而不仅仅是受盐度和/或内涝胁迫影响的环境。
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引用次数: 1
Tagasaste silvopastures in steep-hill country. 1. Tagasaste edible dry-matter production and nutritive value 塔加萨斯特森林牧场在陡峭的山区。1. 印度菜可食干物质的生产及营养价值
IF 1.9 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2023-03-07 DOI: 10.1071/CP22221
K. Tozer, G. Douglas, Emma Noakes, R. Greenfield, C. Cameron
ABSTRACT Context. Tagasaste (Cytisus proliferus) has potential to supplement pasture production in steep-hill country and increase pasture resilience. Aims. To (1) quantify production of edible dry matter (EDM) of pruned 2-year-old tagasaste shrubs and branches from unpruned 10-year-old tagasaste trees, and (2) determine the effect of proximity of the 10-year-old tagasaste trees on selected pasture species established as spaced transplants. Methods. A site was established on the eastern coast of the North Island of New Zealand on steep-hill country (>20° slope). Tagasaste and pasture species production was measured over 3 years. Results. Tagasaste shrubs produced an average of 2.7 kg EDM shrub−1 year−1 and a tree branch produced 129 g EDM year−1. The metabolisable energy content of tagasaste branches averaged 10.0 MJ kg EDM−1, the crude protein content ranged from 18% to 27% and neutral detergent fibre content averaged 39%. Branch diameter and length were poor predictors of EDM branch−1. There was no effect of increasing proximity to tagasaste on DM production of the resident pasture. Effects of increasing proximity to tagasaste on the growth and survival of selected pasture species are reported in a companion paper. Conclusions. Edible-DM production was much greater from shrubs than tree branches and it was not possible to predict branch EDM from branch diameter or length. Implications. A tagasaste silvopasture is likely to be more productive if tagasaste is managed for grazing in situ than if using mature trees for harvesting of branches for browse.
摘要上下文。Tagasaste(Cytisus proliferus)有潜力补充陡坡地区的牧场生产,提高牧场的恢复力。目标。(1)量化修剪后的2年生田甘树灌木和未修剪的10年生田甘树的枝条的可食用干物质(EDM)的产生,以及(2)确定10年生田甘树的接近度对作为间隔移植建立的选定牧场物种的影响。方法。在新西兰北岛在……的东海岸陡峭的山坡上(>20°斜坡)建立了一个场地。Tagasaste和牧场物种产量在3年内进行了测量。后果Tagasaste灌木每年平均产生2.7公斤EDM灌木,树枝每年产生129克EDM。tagasaste枝条的代谢能含量平均为10.0MJ kg EDM−1,粗蛋白含量在18%至27%之间,中性洗涤剂纤维含量平均为39%。分支直径和长度是EDM分支-1的较差预测因子。增加与塔加斯特的接近度对常驻牧场的DM产量没有影响。在一篇配套论文中报道了越来越接近塔加斯特对选定牧场物种生长和存活的影响。结论。灌木的可食用DM产量远高于树枝,并且无法从树枝直径或长度预测树枝EDM。含义。如果塔加斯特在原地放牧,那么塔加斯特森林牧场的生产力可能比使用成熟树木收割树枝进行浏览更高。
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引用次数: 0
Legume persistence for grasslands in tableland environments of south-eastern Australia 澳大利亚东南部高原环境中豆科植物对草地的持久性
IF 1.9 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2023-03-02 DOI: 10.1071/CP22277
R. Hayes, Matthew T. Newell, Guangdi D. Li, R. Haling, C. Harris, R. Culvenor, W. Badgery, Neil Munday, A. Price, R. S. Stutz, R. Simpson
ABSTRACT Context. Improving the stability of legumes in grasslands in the face of variable seasonal conditions is key to mitigating risks posed by drought. Aims. We assessed the persistence of a range of legume species and cultivars in order to inform legume choice for pasture improvement and identify priority species for further development. Methods. Twenty field experiments in four series were conducted at sites with contrasting seasonal and soil characteristics in the ‘high-rainfall’ (560–920 mm long-term average) Tablelands and Monaro regions of New South Wales, Australia. Legumes were grown as pure swards and assessed periodically for seedling density, plant frequency and dry matter for up to 5 years. Key results. Legume dry matter production was positively correlated with plant frequency. However, most legumes persisted poorly at most sites, particularly on soils of lower fertility. Subterranean clover (Trifolium subterraneum) cv. Goulburn was the best performing cultivar of that species across sites on the Southern Tablelands and Monaro. Yellow serradella (Ornithopus compressus) cvv. Avila and Yellotas showed promising persistence, particularly under drought conditions. White clover (T. repens) was the most broadly adapted of the perennial legumes across a range of soils, but persistence was still inadequate at many sites. Lucerne (Medicago sativa) was approximately twice as productive as the next-most productive species when soil conditions suited its growth, but it failed to persist on acidic, low-fertility soils. Conclusions. Serradella species (yellow and French, O. sativus) and white clover, in conjunction with subterranean clover, offer the best near-term prospects for diversifying legume productivity and resilience under variable seasonal conditions in tableland environments. Implications. An increased focus on phenology and seed characteristics is suggested to improve the persistence of annual and facultative perennial legume species in grasslands. Serradella and white clover are identified as the highest priorities for cultivar development for tableland environments of south-eastern Australia.
摘要上下文。面对多变的季节条件,提高草原上豆类的稳定性是减轻干旱风险的关键。目标。我们评估了一系列豆类物种和品种的持久性,以便为牧场改良的豆类选择提供信息,并确定进一步发展的优先物种。方法。在澳大利亚新南威尔士州的“高降雨量”(560–920毫米长期平均值)高原和莫纳罗地区,在具有对比季节和土壤特征的地点进行了四个系列的20个田间试验。豆类作为纯草皮种植,并在长达5年的时间内定期评估幼苗密度、植株频率和干物质。关键成果。豆类干物质产量与植株频率呈正相关。然而,大多数豆科植物在大多数地点的存活率很低,尤其是在肥力较低的土壤上。地下三叶草(Trifolium subterraneum)cv.Goulburn是该物种在南部高原和莫纳罗地区表现最好的品种。黄色serradella(Ornithopus compressus)cvv。Avila和Yellotas表现出有希望的持久性,特别是在干旱条件下。白三叶草(T.repens)是一系列土壤中最广泛适应的多年生豆科植物,但在许多地方仍然不够持久。当土壤条件适合其生长时,苜蓿(Medicago sativa)的生产力大约是第二高生产力物种的两倍,但它未能在酸性、低肥力土壤中持续存在。结论。Serradella物种(黄色和法国,O.sativus)和白三叶草,以及地下三叶草,在高原环境中的可变季节条件下,为豆类生产力和恢复力的多样化提供了最佳的近期前景。含义。建议更多地关注酚学和种子特性,以提高一年生和兼性多年生豆科植物在草原上的持久性。塞拉德拉和白三叶草被确定为澳大利亚东南部高原环境下品种开发的最高优先事项。
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引用次数: 4
Productivity assessment of common bean (Phaseolus vulgaris) germplasm from Serbia 塞尔维亚菜豆(Phaseolus vulgaris)种质的生产力评价
IF 1.9 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2023-03-02 DOI: 10.1071/CP22275
Aleksandra D. Ilić, Miroslav Z. Zorić, D. Živanov, S. Medić-Pap, M. Vasić
Abstract Context. In Serbia, common bean (Phaseolus vulgaris L.) production largely relies on improved commercial cultivars; however, many farmers still grow and maintain landraces. Productivity assessment of common bean landraces from Serbia may enrich knowledge of bean diversity from Western Balkans, Europe and worldwide. Aims. The study aims were to describe the underlying structure of a selected set of landraces and commercial cultivars of common bean, identify relatedness of accessions, and determine breeding values. Methods and key results. Overall productivity was assessed through main yield components during a 2-year field trial. Average seed yield per plant was 7.9 g, with 1000-seed weight 425 g, 7.4 pods per plant and 22.9 seeds per plant. Accessions were classified according to seed colour and shape, with the Albus group generally showing highest productivity traits. Phenotypic and genotypic variability of the selected set was previously determined. Principal component analysis was used to assess bean germplasm structure, revealing subdivisions partially according to gene pool (Mesoamerican or Andean), evident through the existence of one larger Andean group. Relatedness of genotypes was assessed by hierarchical cluster analysis. Additional variation concentrated within the Andean gene pool was detected. Positive correlations were observed among numbers of pods and seeds per plant, yield per plant and plant height. According to the Mantel test, positive associations were observed among productivity trait distance, genetic distance and descriptive trait distance. Conclusions. Substantial variation in productivity was observed for bean landraces, with differences among gene pools and seed forms, revealing their agronomic value. Acknowledged structure of agronomic traits and recognised stratification will assist in multilevel organisation of common bean breeding programs. Implications. Combined information on phenotypic, genotypic and productivity value should benefit selection of promising parental lines associating good agronomic performance with sufficient variability, according to consumer preferences.
抽象上下文。在塞尔维亚,普通大豆(Phaseolus vulgaris L.)的生产在很大程度上依赖于改良的商业品种;然而,许多农民仍在种植和维持土地竞赛。对塞尔维亚常见豆类地方品种的生产力评估可以丰富西巴尔干、欧洲和世界各地对豆类多样性的了解。目标。本研究旨在描述一组选定的地方品种和商业品种的基本结构,确定材料的相关性,并确定育种价值。方法和关键结果。在为期2年的田间试验中,通过主要产量组成部分评估了总体生产力。单株平均种子产量为7.9克,1000粒种子重量为425克,单株7.4个荚,单株22.9个种子。根据种子的颜色和形状对可达性进行分类,阿不思组通常表现出最高的生产力特征。所选集合的表型和基因型变异性已预先确定。主成分分析用于评估大豆种质结构,部分根据基因库(中美洲或安第斯)揭示细分,通过一个较大的安第斯群体的存在可以明显看出。通过层次聚类分析评估基因型的相关性。还发现了集中在安第斯基因库中的其他变异。单株荚数和种子数、单株产量和株高呈正相关。根据Mantel检验,生产力-性状距离、遗传距离和描述性性状距离呈正相关。结论。大豆地方品种的生产力存在显著差异,基因库和种子形式之间存在差异,揭示了它们的农艺价值。公认的农艺性状结构和公认的分层将有助于普通大豆育种计划的多层次组织。含义。根据消费者的偏好,表型、基因型和生产力价值的综合信息应有利于选择有希望的亲本系,这些亲本系将良好的农艺性能与足够的变异性联系起来。
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引用次数: 0
Simulating the population dynamics of barley grass (Hordeum spp.) and impacts of weed management strategies in a southern Australian lucerne (Medicago sativa) pasture 南澳大利亚苜蓿(Medicago sativa)牧场大麦草(Hordeum spp.)种群动态模拟及杂草管理策略的影响
IF 1.9 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2023-02-28 DOI: 10.1071/CP22297
Jane E. Kelly, K. Behrendt, J. Quinn
ABSTRACT Context. Barley grass (Hordeum spp. L.) is an annual, invasive grass weed of southern Australian crops and pastures, frequently associated with weight loss and carcass damage in sheep due to its sharp seeds. Knowledge gaps exist regarding optimal density thresholds for effective control to reduce impacts on animal production. The value of integrated weed management (IWM) over individual control options for reducing barley grass populations in pasture is also unknown. Aims. We aimed to develop a model for simulating the population dynamics of barley grass within lucerne (Medicago sativa L.) pastures of southern Australia and to test the hypothesis that combining herbicides with mowing will be more effective for removing barley grass seedbanks over time than individual control measures. Methods. The model was developed within Microsoft Excel and adapted from other annual grass models. The model takes a Monte Carlo approach to simulate control impacts on weed seedbanks over 10 years using five weed-control density thresholds. It was parameterised using data from recent experiments and available literature. Key results. The most effective long-term control strategy for barley grass occurred with a density threshold of 5 seedlings m−2 by combining early and late herbicide applications, and by combining early and late herbicides with mowing, reducing the seedbank by 86% and 89%, respectively. Conclusions. Simulation results showed that IWM programs were more effective than individual control options in reducing the barley grass seedbanks over 10 years, particularly at low weed densities (≤50 seedlings m−2). Implications. Incorporation of this model into a bioeconomic grazing systems model will be valuable for determining the economic impacts and optimal weed-control strategies for minimising the effects of barley grass seed contamination in lamb production systems.
抽象的上下文。大麦草(Hordeum spp. L.)是南澳大利亚作物和牧场的一年生入侵杂草,由于其尖锐的种子,经常与羊的体重减轻和胴体损伤有关。在有效控制以减少对动物生产影响的最佳密度阈值方面存在知识空白。综合杂草管理(IWM)在减少牧场大麦草种群方面的价值也不清楚。目标我们的目的是建立一个模型来模拟大麦草在南澳大利亚苜蓿(Medicago sativa L.)牧场的种群动态,并验证除草剂与割草相结合在去除大麦草种子库方面比单个控制措施更有效的假设。方法。该模型是在Microsoft Excel中开发的,并改编自其他一年生草模型。该模型采用蒙特卡罗方法,使用5个杂草控制密度阈值来模拟10年来对杂草种子库的控制影响。使用最近的实验数据和现有文献对其进行了参数化。关键的结果。大麦草长期防治策略以5苗m−2为密度阈值,采用早、晚除草剂联合除草、早、晚除草剂联合除草,可分别减少种子库86%和89%。结论。模拟结果表明,在10年内,综合管理方案比单独控制方案在减少大麦草种子库方面更有效,特别是在低杂草密度(≤50株m−2)时。的影响。将该模型纳入生物经济放牧系统模型将有助于确定经济影响和最佳杂草控制策略,以最大限度地减少大麦草籽污染对羊肉生产系统的影响。
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引用次数: 0
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Crop & Pasture Science
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