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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Inheritance of resistance to anthracnose stalk rot (Colletotrichum graminicola) in tropical maize inbred lines

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Author(s):
Matiello, Rodrigo Rodrigues [1] ; Brunelli, Katia Regiane [2] ; Gomes Lopes, Maria Teresa [3] ; Sartori Coelho Morello, Regina Melo [4] ; da Silva, Herberte Pereira [4] ; Aranha Camargo, Luis Eduardo [4]
Total Authors: 6
Affiliation:
[1] Univ Estadual Ponta Grossa, Dept Fitotecnia & Fitossanidade, BR-84030900 Ponta Grossa, PR - Brazil
[2] Sakata Seed Sudamer, BR-12906840 Braganca Paulista, SP - Brazil
[3] Univ Fed Amazonas, Dept Prod Anim & Vegetal, BR-69077000 Manaus, Amazonas - Brazil
[4] Univ Sao Paulo, USP ESALQ, Dept Fitopatol & Nematol, BR-13418900 Piracicaba, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Crop Breeding and Applied Biotechnology; v. 12, n. 3, p. 179-184, SEP 2012.
Web of Science Citations: 5
Abstract

Generation means was used to study the mode of inheritance of resistance to anthracnose stalk rot in tropical maize. Each population was comprised of six generations in two trials under a randomized block design. Inoculations were performed using a suspension of 10(5) conidia mL-1 applied into the stalk. Internal lesion length was directly measured by opening the stalk thirty days after inoculation. Results indicated contrasting modes of inheritance. In one population, dominant gene effects predominated. Besides, additive x dominant and additive x additive interactions were also found. Intermediate values of heritability indicated a complex resistance inheritance probably conditioned by several genes of small effects. An additive-dominant genetic model sufficed to explain the variation in the second population, where additive gene effects predominated. Few genes of major effects control disease resistance in this cross. Heterosis widely differed between populations, which can be attributed to the genetic background of the parental resistant lines. (AU)