@article {1570,
	title = {Pollinating bees (Hymenoptera: Apiformes) of U.S. alfalfa compared for rates of pod and seed set},
	journal = {Journal of Economic Entomology},
	volume = {95},
	year = {2002},
	month = {2002///},
	pages = {22 - 27},
	abstract = {Alfalfa (=lucerne) flowers require visiting bees to trip the sexual column, thereby providing pollination and subsequent pod and seed set. Previous studies have compared the pollination values of different bee species solely by the speed with which they handle flowers and the proportion of visited flowers tripped. In this greenhouse study, five species of bees, including the three commercially managed U.S alfalfa pollinators, are likewise compared for their floral tripping frequencies. These bee species are also compared for the pod set and mature seed that results from their single visits to virgin flowers. Regardless of the identity of the pollinating bee, tripped flowers had the same probabilities of pod set and seed set. Thus, differences in the single-visit pollination efficiencies of the various bee species are entirely attributable to the proportion of visited flowers that they trip. Females of the alkali bee, Nomia melanderi Cockerell, and the alfalfa leafcutting bee, Megachile rotundata F, tripped 81 and 78\% of visited flowers, respectively. Males of these species are significantly less effective (61 and 51\%, respectively), but still significantly superior to the honey bee, Apis mellifera L. (22\% of visited flowers tripped). These relationships are supported by field data for tripping frequencies. One candidate pollinator, Osmia sanrafaelae Parker, shows promise (44\% tripped), but not the congeneric O. aglaia Sandhouse (13\% tripped)},
	keywords = {APIDAE, APIS, Apoidea, FABACEAE, FRUIT SET, Halictidae, MEDICAGO, MEGACHILE, Megachilidae, NOMIA, OSMIA, POLLINATION, POLLINATION EFFICIENCY, POLLINATOR, SEED, SEED SET},
	author = {Cane, J. H.}
}
@article {1569,
	title = {Pollinator genetics and pollination: do honey bee colonies selected for pollen-hoarding field better pollinators of cranberry Vaccinium macrocarpon?},
	journal = {Ecological Entomology},
	volume = {26},
	year = {2001},
	month = {2001///},
	pages = {117 - 123},
	abstract = {1. Genetic polymorphisms of flowering plants can influence pollinator foraging but it is not known whether heritable foraging polymorphisms of pollinators influence their pollination efficacies. Honey bees Apis mellifera L. visit cranberry flowers for nectar but rarely for pollen when alternative preferred flowers grow nearby. 2. Cranberry flowers visited once by pollen-foraging honey bees received fourfold more stigmatic pollen than flowers visited by mere nectar-foragers (excluding nectar thieves). Manual greenhouse pollinations with fixed numbers of pollen tetrads (0, 2, 4, 8, 16, 32) achieved maximal fruit set with just eight pollen tetrads. Pollen-foraging honey bees yielded a calculated 63\% more berries than equal numbers of non-thieving nectar-foragers, even though both classes of forager made stigmatic contact. 3. Colonies headed by queens of a pollen-hoarding genotype fielded significantly more pollen-foraging trips than standard commercial genotypes, as did hives fitted with permanently engaged pollen traps or colonies containing more larvae. Pollen-hoarding colonies together brought back twice as many cranberry pollen loads as control colonies, which was marginally significant despite marked daily variation in the proportion of collected pollen that was cranberry. 4. Caloric supplementation of matched, paired colonies failed to enhance pollen foraging despite the meagre nectar yields of individual cranberry flowers. 5. Heritable behavioural polymorphisms of the honey bee, such as pollen-hoarding, can enhance fruit and seed set by a floral host (e.g. cranberry), but only if more preferred pollen hosts are absent or rare. Otherwise, honey bees{\textquoteright} broad polylecty, flight range, and daily idiosyncrasies in floral fidelity will obscure specific pollen-foraging differences at a given floral host, even among paired colonies in a seemingly uniform agricultural setting},
	keywords = {APIDAE, APIS, Apoidea, BEHAVIOR-FORAGING, CRANBERRIES, ERICACEAE, FLIGHT, FLORAL REWARDS-POLLEN, FLOWERING, FRUIT SET, FRUIT SIZE, GENETICS, LARVAE, POLLEN, POLLEN LOAD- STIGMA, POLLEN TRAP, POLLINATION, POLLINATION EFFICIENCY, POLLINATOR, POLYLECTY, POLYMORPHISM, SEED, SEED SET, TRAP, VACCINIUM, VARIATION},
	author = {Cane, J. H. and Schiffhauer,D.}
}
@article {1571,
	title = {Dose-response relationships between pollination and fruiting refine pollinator comparisons for cranberry (Vaccinium macrocarpon [Ericaceae])},
	journal = {American Journal of Botany},
	volume = {90},
	year = {2003},
	month = {2003///},
	pages = {1425 - 1432},
	abstract = {Comparisons of pollinator efficacy using pollen received on stigmas can be refined by incorporating experimental dose-response relationships for pollen deposition and fruiting responses. A range of discrete pollen doses applied to cranberry stigmas resulted in decelerating curvilinear responses for fruiting, berry size, and seed set. Minimum thresholds and maximum asymptotes bounded reproductive responses to incremental stigmatic pollen loads. Four bee species were compared for their pollination efficacies on commercial cranberries. using counts of pollen received by stigmas during single bee visits to previously virgin flowers. Differences between these bee species were found to be exaggerated when raw pollen counts were used for comparison because foragers of some species often delivered pollen in excess of that needed to maximize fruit and seed production. Sixfold differences between species in mean pollen deposition translated into 1.5-2-fold differences in predicted cranberry fruit set and size. Implications for pollen tube competition and agricultural production are discussed},
	keywords = {APIS, Apoidea, BOMBUS, COMPETITION, CRANBERRIES, ERICACEAE, FRUIT PRODUCTION, FRUIT SET, FRUIT SIZE, POLLEN, POLLEN LOAD- STIGMA, POLLEN TUBE, POLLINATION, POLLINATION EFFICIENCY, POLLINATION INTENSITY, POLLINATOR, SEED, SEED PRODUCTION, SEED SET, SIZE, STIGMA, VACCINIUM},
	author = {Cane, J. H. and Schiffhauer,D.}
}
@article {1576,
	title = {Pollination needs of arrowleaf balsamroot, Balsamorhiza sagittata (Heliantheae: Asteraceae)},
	volume = {65},
	year = {2005},
	note = {J
JUL},
	month = {2005///},
	pages = {359 - 364},
	abstract = {Arrowleaf balsamroot, Balsamorhiza sagittata (Pursh) Nutt, is a common, sometimes dominant, long-lived forb that flowers early in spring from the foothills to upper-montane areas of the northern Rocky Mountains and Intermountain West. Public land managers desire its seed for rangeland rehabilitation. Through manual pollination field trials, the species was found to have a mixed pollination system. It is primarily xenogamous (46\% of ovules yielded plump achenes) but partially self-compatible (31\% of achenes were plump). Unvisited flower heads formed virtually no mature achenes; only plump achenes contained seeds with endosperm. Freely visited flower heads in 2 populations produced as many achenes as manual outcross pollinations of flower heads, suggesting that seed production was not pollinator limited. Two species of Osmia bees rely mostly on Balsamorhiza and its close relative, Wyethia, for pollen. At least 165 females per hectare will need to be stocked to achieve thorough flower visitation in cultivated seed production fields},
	keywords = {ASTERACEAE, BALSAMORHIZA, OSMIA, OUTCROSSING, POLLINATION, POLLINATOR, SEED SET, SELF-COMPATIBILITY},
	url = {ISI:000231102200007},
	author = {Cane, J. H.}
}
@article {1631,
	title = {Breeding biology of the threadstalk milkvetch, Astragalus filipes (Fabaceae), with a review of the genus},
	journal = {American Midland Naturalist},
	volume = {165},
	year = {2011},
	month = {2011///},
	pages = {225 - 240},
	abstract = {Astragalus L. (Fabaceae) is an enormous and diverse plant genus with a cosmopolitan distribution, but relatively few breeding biologies are known for its member species. Threadstalk (or basalt) milkvetch, Astragalus filipes Torrey ex. A. Gray, is common and widespread throughout the US Intermountain West, including the Great Basin. It is being studied and ultimately propagated for extensive rangeland restoration projects throughout the sagebrush steppe. Understanding the breeding biology of A. filipes will be necessary for reliable and consistent commercial seed production with this species. We examined reproductive output from four manual pollination treatments (autogamy, geitonogamy, xenogamy and distant xenogamy) in a common garden. As measures of fitness, we counted fruit and seed set, then germinated viable seeds, to assess reproductive output. This species is weakly self compatible; xenogamous pollen transfer results in nine times more seed per pollination. Pollen transfer between geographically distant seed accessions resulted in a decrease in seed germination, but no difference in fruit or seed set. Cross pollination by bees will be necessary for copious seed production by this species. In the wild, flowers of A. filipes are visited most commonly and ubiquitously by a diversity of Osmia bee species plus several bee species each of Eucera, Anthidium, Bombus and sometimes Hoplitis.},
	keywords = {ASTRAGALUS, BOMBUS, FABACEAE, FRUIT SET, Megachilidae, OSMIA, OUTCROSSING, POLLINATION, POLLINATOR, SEED PRODUCTION, SEED SET, SELF-COMPATIBILITY},
	author = {Watrous,K.W. and Cane, J. H.}
}
