ISHS Acta Horticulturae 455: V International Mango Symposium
MANGO BREEDING FOR RESISTANCE TO DISEASES AND PESTS. |
| Authors: | C.J. Rossetto, I.J.A. Ribeiro, P.B. Gallo, N.B. Soares, J.C. Sabino, A.L.M. Martins, N. Bortoletto, E.M. Paulo |
| Keywords: | Mangifera indica, varieties, Ceratocystis fimbriata, mango-wilt, rootstocks |
| Abstract:
The mango breeding program for resistance to diseases and pests of the Instituto Agronômico de Campinas (IAC), has two main objectives: (1) To obtain polyembrionic rootstocks resistant to the fungi Ceratocystis fimbriata which causes the mango-wilt. The goal is to distribute at least ten resistant rootstocks in order to avoid genetic vulnerability. (2) To obtain mono or polyembrionic varieties for utilization as crown, with good qualities, mainly productivity and fruit taste, plus resistance to the mango-wilt, powdery mildew, anthracnose and fruit-fly. The first cultivar derived from this program, named IAC 100 Bourbon, was distributed to farmers on December 8, 1989. It is a resistant mutant of the popular table variety Bourbon, which had been almost eliminated by the mango-wilt. Two rootstocks resistant to the mango-wilt, IAC 101 Coquinho and IAC 102 Touro were distributed on January 12, 1994. Four new varieties, two crowns, IAC 103 Mococa and IAC 105 Campinas and two rootstocks, IAC 104 Dura and IAC 106 Jasmin are scheduled for distribution on January 9, 1998. Three other crown varieties, IAC 107 Tietê, IAC 108 Pindorama and IAC 109 Votuporanga are being prepaired for distribution. It has been relatively ease to obtain mutants with resistance to mango-wilt from susceptible polyembrionic varieties. The distributed varieties are not resistant to all diseases and pests. The precoce table varieties (IAC 103 Mococa and IAC 107 Tietê) have sufficient natural resistance against the fruit-fly damage, but the late varieties (IAC 105 Campinas and IAC 109 Votuporanga) requires control measures against this pest. | |
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