Registration of ‘WL 322 HQ’ Alfalfa

Huset, D. E.; Schnebbe, D. A.; Kugler, J. L.; Peterson, Mark A.

doi:10.2135/cropsci1991.0011183x003100060066x

Cited by 9 publications

(6 citation statements)

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“…H igh quality forage is essential to sustain a high dairy production rate and maintain animal body condition. Forage quality has become one of the main focuses of current breeding programs and is an important selection trait in addition to yield, winter survival, and disease resistance (Sumberg et al, 1983; Coors et al, 1986; Huset et al, 1991). Forage quality can be improved through plant breeding, by exploiting the genetic variation in protein and fiber traits, and cultural practices, such as P and K fertilization (Nelson and MacGregor, 1957; Markus and Battle, 1965; Berg et al, 2007).…”

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confidence: 99%

Alfalfa Yield and Morphology of Three Fall‐Dormancy Categories Harvested at Two Phenological Stages in a Subtropical Climate

Rimi

Macolino

Leinauer³

et al. 2010

Agronomy Journal

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Alfalfa (Medicago sativa L.) is the most important hay crop used in the dairy industry of the Po Valley, Italy, characterized by a subtropical climate with hot, humid summers and cool winters. Information is lacking as to selecting fall dormancy (FD) varieties adapted to the region and their response to intense harvest regimes. A 3-yr study was conducted to investigate the effect of two harvest regimes based on phenological stage (early bud and early flower) and three FD categories on productivity, canopy height, and leaf to stem proportion. Cultivars with FD ratings of 7.5 (less nondormant), 8.5 (nondormant), and 10.5 (very nondormant) were seeded in April 2005 at the experimental farm of Padova University in Legnaro, Italy. The experimental design was a randomized complete block in a split-plot arrangement. Canopy height and dry matter (DM) yield were measured at each harvest. Subsamples were collected to determine leaf area index (LAI), stem silhouette area index (SAI), and leaf dry matter to stem dry matter ratios (LSR). Nondormant cultivars had higher DM yield (18.2 Mg ha−1) than less nondormant (17.1 Mg ha−1) and very nondormant cultivars (16.9 Mg ha−1). Harvesting at early bud decreased DM yield by 11% compared to early flower. The FD categories had no effect on LAI/SAI and LSR ratios, however harvesting at early bud increased both ratios by 12.0 to 12.5%. Producers in subtropical climates may obtain alfalfa hay with a high portion of leaves at a reasonable yield from the three tested FD categories by cutting alfalfa at early bud stage

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confidence: 99%

Alfalfa Yield and Morphology of Three Fall‐Dormancy Categories Harvested at Two Phenological Stages in a Subtropical Climate

Rimi

Macolino

Leinauer³

et al. 2010

Agronomy Journal

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“…Forage breeders have traditionally used dry matter yield, winter survival, and disease resistance as the primary criterion for cultivar selection. More recently, near infrared reflectance spectroscopy (NIRS) has been used to rapidly and inexpensively determine forage quality and allow forage cultivar selection based on quality parameters (Coors et al, 1986; Huset et al, 1991; Sumberg et al, 1983). Since 1991, alfalfa cultivars that are selected for higher quality have been commercially available (Huset et al, 1991) However, the morphological or physiological reasons for the higher quality of these cultivars is not clearly understood.…”

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confidence: 99%

“…More recently, near infrared reflectance spectroscopy (NIRS) has been used to rapidly and inexpensively determine forage quality and allow forage cultivar selection based on quality parameters (Coors et al, 1986; Huset et al, 1991; Sumberg et al, 1983). Since 1991, alfalfa cultivars that are selected for higher quality have been commercially available (Huset et al, 1991) However, the morphological or physiological reasons for the higher quality of these cultivars is not clearly understood. McQueen and Belanger (1994) reported no leaf to stem ratio differences between the high quality and traditional cultivars, but they later reported a greater stem digestibility and a greater proportion of leaves in the high‐quality cultivars (Belanger and McQueen, 1995)…”

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Morphological Development of Alfalfa Cultivars Selected for Higher Quality

2000

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Alfalfa (Medicago sativa L.) maturity at the time of harvest greatly influences forage quality. The objective of this research was to determine if observed quality differences between high quality and other alfalfa cultivars were due to differences in morphological development. Two high‐quality cultivars (‘WL 252HQ’, ‘WL 322HQ’) and two check cultivars (‘5262’, ‘5454’) with similar fall dormancy ratings were established on a Murrill silt loam (fine‐loamy, mixed, mesic Typic Hapludult) in the spring of 1996. During 1997, 1998, and 1999, each cultivar was hand‐sampled weekly for 4 consecutive wk during the spring growth period and for 3 consecutive wk during the three subsequent growth periods. Morphological development and forage quality were determined for each alfalfa cultivar at each sampling. There were no interactions between growth period or sampling times and alfalfa cultivars for either alfalfa maturity or forage quality. Morphological development of the cultivars was not different at any of the sampling times. Averaged across all growth periods and sampling times, crude protein (CP) concentrations and in vitro dry matter digestibility (IVDMD) were 14 and 13 g kg−1, respectively, higher for the high‐quality cultivars (ADF) and neutral‐detergent fiber (NDF) concentrations were 16 and 15 g kg−1, respectively, lower. The data from this research indicates that the difference in quality between the high quality and traditional alfalfa cultivars is not due to differences in morphological development. Selecting for higher‐quality alfalfa was successful and is not an artifact of inadvertently selecting for delayed development.

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“…Appreciable genetic differences for these traits have been inconsistently reported (Coors, Lowe, & Murphy, ; Lenssen, Sorensen, Posler, & Harbers, ; Rotili, Gnocchi, Scotti, & Zannone, ; Tremblay, Bélanger, McRae, & Michaud, ), and selection progress for improved forage quality has generally been limited (Annicchiarico et al., ). Cultivars claimed for specifically enhanced quality attributes are few (Hall, Smiles, & Dickerson, ; Huset, Schnebbe, Kugler, & Peterson, ), and quality‐improved germplasm has not always exhibited higher nutritive value than other cultivars (Martin & Sheaffer, ). Other factors are known to interact with the cultivar in determining the nutritive value of lucerne, thus hindering possible genetic effects.…”

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confidence: 99%

Effects of plant architecture and drought stress level on lucerne forage quality

Pecetti

Annicchiarico

Scotti

et al. 2016

Grass and Forage Science

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Breeding for enhanced quality in lucerne (Medicago sativa) frequently involves selection for higher leaf‐to‐stem ratio, multifoliolate leaves or short‐internode stems. Three populations selected for such alternative morphologies and a reference cultivar were evaluated for forage yield, leaf‐to‐stem ratio and protein and fibre concentrations in leaves, stems and whole plants. Four managed environments were obtained by combining two stress levels (moderate or nil) with two sowing times. The population selected for high leaf‐to‐stem ratio, as well as the short‐internode population, had highest leaf‐to‐stem ratio (1.27) across six harvests in two non‐stress environments. The latter population had higher stem protein (12.9%) and lower stem neutral‐detergent fibre (NDF) concentration (58.7%) than other populations. The multifoliolate population had intermediate quality, showing low expression of the multifoliolate trait (14.0% across four environments), particularly under stress (10.5%). The autumn‐sown, fully irrigated environment had, on average, highest dry‐matter yield (4.19 t ha−1) and lowest leaf‐to‐stem ratio (0.74). Drought‐stressed environments had lower plant NDF (−12.3% on average) and leaf protein (−9.7%), and higher stem protein (+8.6%) than fully irrigated environments. The results suggested that environmental effects might have greater impact on quality than genetic effects, even for a population set including material selected for quality‐driven morphology.

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Registration of ‘WL 322 HQ’ Alfalfa

Cited by 9 publications

References 0 publications

Alfalfa Yield and Morphology of Three Fall‐Dormancy Categories Harvested at Two Phenological Stages in a Subtropical Climate

Alfalfa Yield and Morphology of Three Fall‐Dormancy Categories Harvested at Two Phenological Stages in a Subtropical Climate

Morphological Development of Alfalfa Cultivars Selected for Higher Quality

Effects of plant architecture and drought stress level on lucerne forage quality

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