Seedset Rating as a Measure of Fertility in Grasses<sup>1</sup>

Trupp, C. R.; Slinkard, A. E.

doi:10.2135/cropsci1965.0011183x000500060038x

Cited by 6 publications

(3 citation statements)

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“…Seed yield in native grasses is only as important as the proportion that is germinable. Kernel index measures the proportion of biomass allocated to caryopses in the inflorescence and is distinct from a measure of fertility of inflorescence determined as the percentage of florets that produce caryopses (Trupp and Slinkard, 1965) used the term fertility index rather than kernel index, and found it to be highly correlated with fertility of inflorescence in intermediate wheatgrass. The term fertility index was not used here because size and number of caryopses produced per inflorescence was not taken into account in this study.…”

Section: Resultsmentioning

confidence: 99%

Seed Yield Variation in Blue Grama and Little Bluestem Plant Collections in Southern Manitoba, Canada

Phan

Smith

2000

Crop Science

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Inadequate seed supplies of adapted blue grama [Bouteloua gracilis (H.B.K.) Lag. ex Steud.] and little bluestem [Schizachyrium scoparium (Michx.) Nash.] cultivars limits the use of these two species in the northern Great Plains of Western Canada. This study examined variation in seed yield traits of 11 blue grama and 14 little bluestem plant collections obtained from southern Manitoba, Canada to facilitate development of improved germplasm of these species. Measurements of seed yield traits including harvested air‐dried biomass, culm number, seedhead number, seed yield, caryopsis weight, and kernel index were taken from randomized complete block spaced‐plant nurseries. Tests were conducted for 2 yr at Winnipeg and 1 yr at Carman, MB, Canada. Collections within both species differed significantly for all traits. Significant collection × year (Winnipeg) and collection × location interactions were present for biomass and seed yield, and many of the seed yield‐component traits. While significant, the interactions resulted in few changes in rank among collections. Generally, the most northern collection in both species showed earlier anthesis, produced less biomass, and had lower seed yield than more southern collections. These findings indicate that indigenous plant collections of blue grama and little bluestem show high levels of genetic diversity for biomass, seed yield, and seed yield components, which provide opportunity for development of adapted cultivars with enhanced forage and seed production capability for the region.

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Section: Resultsmentioning

confidence: 99%

Seed Yield Variation in Blue Grama and Little Bluestem Plant Collections in Southern Manitoba, Canada

Phan

Smith

2000

Crop Science

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“…In addition, 100seed weight, as a yield component trait, was determined for each accession by averaging the weight of 3 randomly selected sets of 100 seeds dried to 12% moisture. From 1988–1993, a larger number of IWG accessions were more intensively evaluated annually as described above with the inclusion of two more yield components including seed set rating (SSR, ( Trupp and Slinkard 1965 ) measuring seed head fertility and seed yield (g) per 10 heads. The SSR trait was calculated as the weight (g) of clean seed from 10 seed heads divided by the weight (g) of the unthreshed seed heads.…”

Section: Methodsmentioning

confidence: 99%

Origin of current intermediate wheatgrass germplasm being developed for Kernza grain production

Wagoner,

Crain,

Larson

et al. 2023

Preprint

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Intermediate wheatgrass (IWG, Thinopyrum intermedium [Host] Barkworth & D. R. Dewey) has been developed as a perennial grain crop to provide ecosystem services, environmental benefits, and human food. Grain and products derived from IWG varieties improved for food production have been marketed under the registered trademark, Kernza. In the 1980s, a joint breeding effort between the Rodale Institute (RI) and the Big Flats Plant Material Center used IWG plant introductions (PI) from the National Plant Germplasm System (NPGS) and recurrent phenotypic selection to improve populations of IWG with the goal of developing a perennial grain. Initial selections were provided to The Land Institute where they were subsequently improved for grain production, yet the identity of the founder material of improved, food-grade IWG has not been publicly documented. Recently recovered original documents have been used to reconstruct the early breeding program to identify the most likely 20 PIs that form the founders of modern food-grade IWG. Molecular data using genotyping-by-sequencing in current elite breeding material, remnant seed from the initial RI selections, and preserved sample material have provided supporting evidence for the historical records. The genetic origin for food-grade IWG is focused between the Black Sea and Caspian Sea in the Stavropol region of Russia, with smaller contributions likely from collections as distant as Kazakhstan in the east to Turkey in the west. This work connects the flow of germplasm and utility of NPGS PIs to present day IWG grain cultivars being developed in multiple breeding programs around the world.

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“…), Dewey and Lu (1959) found positive phenotypic and genotypic correlations of 0.58 and 0.62, respectively, between seed weight per spike and seed yield per plant. Trupp and Slinkard (1965) found positive phenotypic and genotypic correlations between seed weight per spike and percentage seed set in intermediate wheatgrass (Agropyron intermedium (Host) Beauv.). Nguyen and Sleper (1983) estimated broad-and narrow-sense heritabilities of 0.61 and 0.50, respectively, for clean seed weight per panicle in tall fescue.…”

Section: Use Of the Polycross Methods In Grass Breedingmentioning

confidence: 95%

Breeding orchardgrass for satisfactory Oregon seed yield combined with high Iowa forage yield and quality

Luedtke

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Seedset Rating as a Measure of Fertility in Grasses¹

Cited by 6 publications

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Seed Yield Variation in Blue Grama and Little Bluestem Plant Collections in Southern Manitoba, Canada

Seed Yield Variation in Blue Grama and Little Bluestem Plant Collections in Southern Manitoba, Canada

Origin of current intermediate wheatgrass germplasm being developed for Kernza grain production

Breeding orchardgrass for satisfactory Oregon seed yield combined with high Iowa forage yield and quality

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Seedset Rating as a Measure of Fertility in Grasses1

Cited by 6 publications

References 0 publications

Seed Yield Variation in Blue Grama and Little Bluestem Plant Collections in Southern Manitoba, Canada

Seed Yield Variation in Blue Grama and Little Bluestem Plant Collections in Southern Manitoba, Canada

Origin of current intermediate wheatgrass germplasm being developed for Kernza grain production

Breeding orchardgrass for satisfactory Oregon seed yield combined with high Iowa forage yield and quality

Contact Info

Product

Resources

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Seedset Rating as a Measure of Fertility in Grasses¹