Exploiting heterosis of semi-hybrids and heterogeneity of cultivar mixtures to enhance alfalfa crop performance

Annicchiarico, Paolo; Pecetti, L.

doi:10.1016/j.fcr.2022.108522

Cited by 4 publications

(4 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This may be the cause of the relatively poor performance of the hybrids in the case of the DFRC crossing groups. Prior studies with alfalfa and other forages indicate germplasms differ in their ability to generate hybrids with superior performance for characteristics such as forage yield (Bhandari et al., 2007; Brummer, 1999; Riday & Brummer, 2002; Riday & Brummer, 2005; Annichiarico & Pecetti, 2022).…”

Section: Resultsmentioning

confidence: 99%

Establishment of alfalfa interseeded into corn in response to one cycle of selection and hybridization

Grabber

Riday

Enjalbert³

et al. 2023

Crop Science

View full text Add to dashboard Cite

Intercropping alfalfa (Medicago sativa L.) in corn (Zea mays L.) can improve forage production, but wet growing conditions and high corn yields adversely impact alfalfa establishment. Therefore, we evaluated breeding alfalfa specifically for intercropping by selecting surviving plants from previous alfalfa varietal evaluations under corn and assigning them to five polycrosses to form cycle-1 synthetics. Pollen from four polycrosses was also used to generate hybrid seed using a male-sterility system. Corn was planted in May, intensively managed, and harvested for silage during September at Arlington and Prairie du Sac Wisconsin during 2019. Parental, polycross, and hybrid alfalfa entries were interseeded as swards between corn rows. Two subplots within each whole plot were treated with prohexadione, fungicide, and insecticide (PFI) or left as nontreated controls. Competition from high yielding corn combined with 43% above average precipitation during the growing season contributed to complete stand failure of nontreated alfalfa. Application of PFI improved foliar health, increased root mass, and enabled alfalfa establishment. Following corn silage harvest average stand density of PFI-treated polycross entries was 35% greater than parental entries (105 vs. 78 plants m −2 ); broad-sense heritability was 0.54. Overall, PFI-treated polycross and hybrid entries had similar stand densities after corn, but posthoc comparisons indicated two hybrids had twofold greater stand density than parental entries. These results indicate plant selection can be highly effective for developing polycross and hybrid germplasm with improved survival under corn. Our findings should stimulate further breeding work to improve alfalfa and other forages for use in intercropping systems.

show abstract

Section: Resultsmentioning

confidence: 99%

Establishment of alfalfa interseeded into corn in response to one cycle of selection and hybridization

Grabber

Riday

Enjalbert³

et al. 2023

Crop Science

View full text Add to dashboard Cite

show abstract

“…Female fertility is expressed at a high level when pollinated with 4x normal M. sativa. This indicates that Alborea lines, when used as seed parents, could be useful in semi-hybrid development, as proposed by [54,55]. In Wisconsin and Queensland, work continues to identify adapted alfalfa cultivars/lines that complement Alborea selections for yield and persistence.…”

Section: The Futurementioning

confidence: 97%

Review of Partial Hybrids between Herbaceous Medicago sativa and Woody Medicago arborea and Their Potential Role in Alfalfa Improvement

Irwin

Bingham

2023

Applied Biosciences

View full text Add to dashboard Cite

Medicago sativa (2n = 4x = 32) and M. arborea (2n = 4x = 32) were thought to be reproductively isolated until hybrids (Alborea) were produced by sexual reproduction for the first time in 2003 in Wisconsin. The hybrids were asymmetric, at or near 2n = 4x = 32, and with a predominance of the alfalfa genome. Only M. sativa seed parents with reproductive abnormalities, including unreduced eggs, have produced hybrids; where M. arborea has been used as the seed parent, no hybrids have resulted. Pedigree selection within derivatives of the two original M. sativa seed parents (MB and M8) has been successful in increasing the frequency of hybrids produced. While Alborea individuals more closely resemble M. sativa, a number of M. arborea-specific traits have been observed across different hybrid individuals. These include single-coil flat pods, large seeds, yellow flowers, indeterminate growth, a minimal crown, lodging, frost resistance, and anthracnose resistance. These M. arborea traits have the potential to restructure alfalfa to increase its versatility and utilisation. There is emerging evidence from North and South America and Australia that some Alborea selections have the capacity to complement adapted alfalfa cultivars for yield. Work is continuing to introgress M. arborea traits of value into alfalfa.

show abstract

“…Different breeding schemes were compared on local germplasm for the development of synthetic [185]. The great diversity available in the alfalfa collection, also including exotic germplasm from central Europe, North America, North Africa and Australia, was exploited to tackle specific breeding targets, such as grazing tolerance [186] or salt tolerance, or to develop the innovative variety type of semihybrids [187]. All these facets of the evaluation work on alfalfa genetic resources resulted in the selection of new varieties or the generation of superior germplasm for further variety release.…”

Section: Forage Cropsmentioning

confidence: 99%

“…All these facets of the evaluation work on alfalfa genetic resources resulted in the selection of new varieties or the generation of superior germplasm for further variety release. Large collections of breeding materials specifically devised for sub-continental or Mediterranean conditions were obtained from locally adapted germplasm and made available to the European project ArimNet Reforma for the first ever genomic selection approach in alfalfa for forage yield under moderately-favorable and drought-stressed conditions and for forage quality traits [187][188][189].…”

Section: Forage Cropsmentioning

confidence: 99%

Plant Genetic Resources for Food and Agriculture: The Role and Contribution of CREA (Italy) within the National Program RGV-FAO

Vaccino,

Antonetti,

Balconi

et al. 2024

Agronomy

View full text Add to dashboard Cite

Conservation, characterization and exploitation of agrobiodiversity are key factors to guarantee food security and face future challenges such as climate changes. These issues are the subject of a series of international agreements, such as the Convention of Biological Diversity, with its Nagoya Protocol, and the International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA) adopted in 2001 and entered into force in 2004. Italy ratified the Treaty in 2004 and instituted a long-lasting program, RGV-FAO, to implement it. CREA is one of the three organizations involved in the RGV-FAO Program, together with the National Research Council (CNR) and Reti Semi Rurali. CREA maintains a total of 40,186 accessions including cereals, vegetables, fruits, forages, industrial crops, forest and woody crops, medicinal and aromatic plants, and their wild relatives. Accessions are conserved using different ex situ conservation systems (seeds, in vivo plants, vegetative organs and in vitro plantlets), and characterized using genetic, morpho-phenological and/or biochemical methods. Herein, we will present the CREA long-lasting program RGV-FAO with some examples of the use of plant genetic resources in breeding programs, including molecular approaches. Some critical issues related to access and benefit sharing in PGRFA, such as the Nagoya Protocol and the Digital Sequence Information, will be discussed, highlighting their potential impact on food security and on the advancement of knowledge.

show abstract

Exploiting heterosis of semi-hybrids and heterogeneity of cultivar mixtures to enhance alfalfa crop performance

Cited by 4 publications

References 46 publications

Establishment of alfalfa interseeded into corn in response to one cycle of selection and hybridization

Establishment of alfalfa interseeded into corn in response to one cycle of selection and hybridization

Review of Partial Hybrids between Herbaceous Medicago sativa and Woody Medicago arborea and Their Potential Role in Alfalfa Improvement

Plant Genetic Resources for Food and Agriculture: The Role and Contribution of CREA (Italy) within the National Program RGV-FAO

Contact Info

Product

Resources

About