Polara, a Low Coumarin Cultivar of Sweetclover

Goplen, B. P.

doi:10.4141/cjps71-050

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Therefore, the success of forage cultivar development based on any of the Melilotus species will depend on a combination of increasing dry matter production and decreasing coumarin content. A number of cultivars of Melilotus have been released to date; Acuma, Cumino, Denta, Polara (Smith and Gorz, 1965 ; Goplen, 1971 ) for M. albus and Norgold (Goplen, 1981 ), N28, N29 (Gorz et al, 1992 ) for M. officinalis . The Melilotus breeding program at Lanzhou University is specifically focused on the development of new cultivars with adaptation to the vast temperate grazing environments of China (Luo et al, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Genotypic Variation in a Breeding Population of Yellow Sweet Clover (Melilotus officinalis)

Luo

Jahufer

et al. 2016

Front. Plant Sci.

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Yellow sweet clover is a widely spread legume species that has potential to be used as a forage crop in Western China. However, limited information is available on the genetic variation for herbage yield, key morphological traits, and coumarin content. In this study, 40 half sib (HS) families of M. officinalis were evaluated for genotypic variation and phenotypic and genotypic correlation for the traits: LS (leaf to stem ratio), SV (spring vigor), LA (leaf area), PH (plant height), DW (herbage dry weight), SD (stem diameter), SN (stem number), Cou (coumarin content), SY (seed yield), across two locations, Yuzhong and Linze, in Western China. There was significant (P < 0.05) genotypic variation among the HS families for all traits. There was also significant (P < 0.05) genotype-by-environment interaction for the traits DW, PH, SD, SN, and SV. The estimates of HS family mean repeatability across two locations ranged from 0.32 for SN to 0.89 for LA. Pattern analysis generated four HS family groups where group 3 consisted of families with above average expression for DW and below average expression for Cou. The breeding population developed by polycrossing the selected HS families within group 3 will provide a significant breeding pool for M. officinalis cultivar development in China.

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Section: Introductionmentioning

confidence: 99%

Genotypic Variation in a Breeding Population of Yellow Sweet Clover (Melilotus officinalis)

Luo

Jahufer

et al. 2016

Front. Plant Sci.

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“…Caspar et al (1982) demonstrated that dicumarol levels in excess of 20 ppm were required to generate a toxic response in calves, with levels of 60 ppm causing death. "Low-coumarin" cultivara of sweetclover have been developed (Goplen, 1971(Goplen, , 1981; however, because this characteristic is recessive, outcrossing of the low-coumarin cultivare with high-coumarin wild Melilotus is an unavoidable problem (Goplen and Weber, 1966). Goplen et al (1964) determined that spoiled low-coumarin cultivare contaminated with up to 10% of high-coumarin plants could safely be fed to cattle.…”

Section: Introductionmentioning

confidence: 99%

Quantitative reversed-phase HPLC analysis of dicumarol in sweetclover hay and silage samples

Muir¹,

Goplen²

1992

J. Agric. Food Chem.

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“…The development of new Melilotus cultivars with low Cou content will be significant to the forage industry. A range of cultivars or breeding lines of Melilotus have been released to date, such as Norgold, N28, and N29 (Goplen, 1981;Gorz et al, 1992) for M. officinalis and Acuma, Cumino, Polara, and Denta (Smith and Gorz, 1965;Goplen, 1971) for M. albus.…”

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confidence: 99%

Genetic Improvement of Key Agronomic Traits in Melilotus albus

et al. 2018

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Melilotus albus Medik. is a legume species with potential to be used as a forage or conserved fodder in Northwest China. Breeding M. albus as a forage crop is focused on simultaneously improving forage yield and reducing coumarin (Cou) content. The goal of the present study was to estimate genotypic variation for several key agronomic traits and to evaluate the impact of single‐trait selection and Smith–Hazel‐index‐based multitrait selection for herbage dry weight (DW), plant height (PH), stem number (SN), and leaf area (LA). A quantitative genetic analysis was conducted on trait measurements from 25 half‐sib (HS) families evaluated at Yuzhong and Linze, in China. Significant (P < 0.05) genotypic variation among the HS families for all traits was observed. There was also significant (P < 0.05) genotype × environment interaction for all traits except for LA. The predicted genetic gain, based on estimated genotypic variance, for single‐trait selection varied from 2.3 to 30.3% per selection cycle. Pattern analysis of the HS family × multitrait best linear unbiased prediction matrix provided a graphical summary of the association among the traits, as well as the four HS family groups generated from clustering. Some members within Group 1 could be crossed to generate a breeding population to be used in recurrent selection for M. albus cultivar development in Northwest China. The applicability of a Smith–Hazel selection index to increase expression of the traits DW, PH, and SN and reduce LA, indirectly reducing Cou content, was confirmed. This index enabled identification of families for increasing key biomass traits and decreasing Cou production.

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Polara, a Low Coumarin Cultivar of Sweetclover

Abstract: not available

Cited by 6 publications

References 2 publications

Genotypic Variation in a Breeding Population of Yellow Sweet Clover (Melilotus officinalis)

Genotypic Variation in a Breeding Population of Yellow Sweet Clover (Melilotus officinalis)

Quantitative reversed-phase HPLC analysis of dicumarol in sweetclover hay and silage samples

Genetic Improvement of Key Agronomic Traits in Melilotus albus

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