species studies Human 6 Apple 2 Basil 2 Date palm 2 Garlic 2 Lettuce 2 Strawberry 2 Tomato 2 Chili pepper 1 Common bean 1 Cow 1 Potato 1 Soybean 1 Grass 1 Habanero pepper 1 apple, pear 1 Spinach 1 Maize 1 Olive 1 Onion 1 Peach 1 Arabidopsis thaliana 1 Banana 1 Pear 1 Beet 1 Carrot 1 Chickpea 1