ISHS Acta Horticulturae 637: XXVI International Horticultural Congress: Advances in Vegetable Breeding
BREEDING FOR RESISTANCE TO LEAFMINER IN LETTUCE |
| Authors: | B. Mou, E.J. Ryder, J. Tanaka, Y.B. Liu, W.E. Chaney |
| Keywords: | Liriomyza langei, Liriomyza huidobrensis, insect resistance, Lactuca sativa, Lactuca serriola, Lactuca saligna, Lactuca virosa |
| Abstract:
Leafminer (Liriomyza langei Frick) is a major pest that causes considerable damage to a wide variety of vegetable crops including lettuce, and resistant cultivars remain the most economic means of insect control. Eighty-four lettuce cultivars and introduction lines were grown in an insect cage with eight replications for resistance screening. Leafminer flies were released in the cage to feed on the plants. Significant genetic variation for leafminer stings per unit leaf area was observed among genotypes tested. Resistant lines with fewer leafminer stings were found in Lactuca sativa, L. saligna, L. serriola, and L. virosa, and the resistance was confirmed in a field experiment. Crosses were made to combine leafminer resistance and superior horticultural traits in crisphead, green leaf, red leaf, romaine, and butterhead lettuces. Leaf miner resistant plants were selected in F2 progenies of such crosses, and were backcrossed to restore horticultural type. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
