APPENDIX C
Number of Publications in 2000–01 of 50 Most Cultivated Species

The 50 most-cultivated species were found by searching FAO’s FAOSTAT agricultural database of primary crops by area harvested. The number of publications was obtained by searching ISI’s Web of Science, a data base of 5,700 journals, for keywords (species or genus names) in titles of articles. Number of research groups was estimated by eliminating research groups bearing the same institutional address and at least one common author (to avoid double counting). Model species are provided as references. Frequently cited papers are defined as being among the top 5 most-commonly cited papers in 2000 and 2001.

Rank

Most Cultivated Crops Common Name

Area Cultivated (ha)

Key Word Searched

Average number of publications 2000/01

Average number of research groups 2000/01

Average times that a frequently cited paper is cited 2000/01

1

Wheat

213,816,865

Triticum durum

11

10

2

 

Wheat

213,816,865

Triticum aestivum

88

78

8

2

Rice, Paddy

151,541,091

Oryza sativa

113

90

9

 

Rice, Paddy

151,541,091

Oryza

124

101

10

3

Maize

137,596,759

Zea mays

88

81

7

4

Soybeans

75,539,904

Glycine max

54

46

3

5

Barley

54,268,528

Hordeum vulgare

42

40

6



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OCR for page 65
The National Plant Genome Initiative: Objectives for 2003–2008 APPENDIX C Number of Publications in 2000–01 of 50 Most Cultivated Species The 50 most-cultivated species were found by searching FAO’s FAOSTAT agricultural database of primary crops by area harvested. The number of publications was obtained by searching ISI’s Web of Science, a data base of 5,700 journals, for keywords (species or genus names) in titles of articles. Number of research groups was estimated by eliminating research groups bearing the same institutional address and at least one common author (to avoid double counting). Model species are provided as references. Frequently cited papers are defined as being among the top 5 most-commonly cited papers in 2000 and 2001. Rank Most Cultivated Crops Common Name Area Cultivated (ha) Key Word Searched Average number of publications 2000/01 Average number of research groups 2000/01 Average times that a frequently cited paper is cited 2000/01 1 Wheat 213,816,865 Triticum durum 11 10 2   Wheat 213,816,865 Triticum aestivum 88 78 8 2 Rice, Paddy 151,541,091 Oryza sativa 113 90 9   Rice, Paddy 151,541,091 Oryza 124 101 10 3 Maize 137,596,759 Zea mays 88 81 7 4 Soybeans 75,539,904 Glycine max 54 46 3 5 Barley 54,268,528 Hordeum vulgare 42 40 6

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The National Plant Genome Initiative: Objectives for 2003–2008 Rank Most Cultivated Crops Common Name Area Cultivated (ha) Key Word Searched Average number of publications 2000/01 Average number of research groups 2000/01 Average times that a frequently cited paper is cited 2000/01 6 Sorghum 42,634,739 Sorghum bicolor 24 22 4 7 Millet 37,401,852 Pennisetum 19 17 1   Millet 37,401,852 Echinochloa 9 8 1   Millet 37,401,852 Panicum 8.5 7 2   Millet 37,401,852 Setaria 8 6 1   Millet 37,401,852 Paspalum 16 14 2 8 Seed Cotton 33,978,922 Gossypium 30 28 3 9 Groundnuts in Shell 25,538,439 Arachis hypogaea 28 27 3 10 Rapeseed 23,961,310 Brassica campestris 11 9 9   Rapeseed 23,961,310 Brassica napus 76 70 7   Rapeseed 23,961,310 Brassica rapa 21 19 4 11 Beans, Dry 23,240,843 Phaseolus vulgaris 73 67 5   Beans, Dry 23,240,843 Phaseolus 89 82 5 12 Potatoes 19,301,006 Solanum tuberosum 47 44 4 13 Sugar Cane 19,245,069 Saccharum officinarum 9 9 0 14 Sunflower Seed 18,397,973 Helianthus annuus 33 31 3 15 Cassava 17,019,975 Manihot esculenta 19 14 3 16 Alfalfa for Forage+Silage 15,728,690 Medicago sativa 26 24 4 17 Oats 12,863,933 Avena 26 24 3 18 Coconuts 10,833,538 Cocos nucifera 8 7 1 19 Coffee, Green 10,766,384 Coffea 21 16 3 20 Cow Peas, Dry 9,862,865 Vigna 52 49 3   Cow Peas, Dry 9,862,865 Vigna unguiculata 23 23 3 21 Oil Palm Fruit 9,712,150 Elaeis guineensis 11 11 2 22 Rye 9,672,849 Secale cereale 16 14 3 23 Sweet Potatoes 9,391,910 Ipomoea batatas 12 13 2 24 Chick-Peas 8,582,102 Cicer arietinum 25 23 2 25 Olives 8,076,533 Olea europeaea 14 13 5 26 Natural Rubber 7,903,421 Hevea 14 13 2

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The National Plant Genome Initiative: Objectives for 2003–2008 Rank Most Cultivated Crops Common Name Area Cultivated (ha) Key Word Searched Average number of publications 2000/01 Average number of research groups 2000/01 Average times that a frequently cited paper is cited 2000/01 27 Sesame Seed 7,783,611 Sesamum indicum 10 9 1 28 Grapes 7,305,355 Vitis vinifera 40 37 5 29 Citrus Fruit/Total 7,201,853 Citrus 185 152 5 30 Cocoa Beans 7,186,666 Theobroma 13 12 1 31 Peas, Dry 6,227,031 Pisum sativum 56 49 9 32 Sugar Beets 5,979,044 Beta vulgaris 25 23 6 33 Apples 5,594,443 Malus 24 23 3 33 Apples 5,594,443 Malus domestica 9 8 1 34 Plantains 4,671,010 Musa 25 24 3 34 Bananas 4,201,809 Musa 25 24 3 35 Tobacco Leaves 4,182,338 Nicotiana tabacum 40 36 4 36 Yams 4,050,872 Dioscorea 14 14 0 37 Pigeon Peas 3,830,215 Cajanus cajan 14 14 1 38 Lentils 3,765,463 Lens culinaris 10 10 2 39 Tomatoes 3,745,229 Lycopersicon 66 60 4 39 Tomatoes 3,745,229 Lycopersicon esculentum 43.5 41 4 40 Oranges 3,598,625 Citrus sinensis 8 7 1 41 Watermelons 3,133,412 Citrullus 7 6 1 42 Triticale 3,059,216 Triticale 30 26 2 43 Mangoes 3,036,343 Mangifera indica 18 16 1 44 Linseed 3,032,743 Linum usitatissimum 13 13 1 45 Buckwheat 2,787,780 Fagopyrum esculentum 5 5 1 46 Cashew Nuts 2,767,486 Anacardium occidentale 5 5 0 47 Onions, Dry 2,738,699 Allium cepa 27 23 5 48 Cabbages 2,623,010 Brassica oleraceae 36 31 7 49 Clover for Forage+Silage 2,362,691 Trifolium 37 34 5 50 Plums 2,295,961 Prunus domestica 2 2 0

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The National Plant Genome Initiative: Objectives for 2003–2008 Rank Most Cultivated Crops Common Name Area Cultivated (ha) Key Word Searched Average number of publications 2000/01 Average number of research groups 2000/01 Average times that a frequently cited paper is cited 2000/01   Other Model & Reference Species Arabidopsis thaliana 277 235 31   Brachypodium 2 2 1   Chlamydomonas 100 79 16   Lotus 24 21 7   Medicago trunculata 20 17 11   Populus 64 55 11   SOURCE: FAOSTAT, 2001 , http://apps.fao.org/page/collections?subset=agriculture; ISI Web of Science, 2000–2001 .