| Titre : |
Host –plant resistance in sorghum to eurystylus immaculatus in West Africa |
| Type de document : |
texte imprimé |
| Auteurs : |
A. Ratnadass, Auteur ; O. Ajayi, Auteur ; G. Fliedel, Auteur |
| Année de publication : |
1995 |
| Importance : |
p 191-199 |
| Langues : |
Anglais (eng) |
| Catégories : |
SCIENCES AGRICOLES
|
| Mots-clés : |
RESISTANCE VARIETALE SORGHO AFRIQUE DE L'OUEST EURYSTYLUS IMMACULATUS INSECTE RAVAGEUR |
| Résumé : |
Screening trials conducted in 1989-92 at Samanko and Bagauda showed that the loose-panicled sorghum cultivars IS 17645, IS 20740 and IS 20638 consistently supported fewer head bugs (eurystylus immaculatus) than other calocoris angustatus-resistant genotypes, under both natural and artificial conditions of infestation. Malisor 84-7 was the most resistant under both natural and artificial infestation at Samanko and Cinzana and Farako-Bâ in 1989 and 1990, and under natural infestation at Bagauda in 1990. Malisor 84-7 confirmed high and stable head bug resistance, both under natural and artificial infestation, in terms of bug populations and damage at Samanko in 1991 and 1992 and at Farako-Bâ in 1991. Although relatively less attractive to bugs, ISIAP Dorado was severely damaged under artificial infestation, while 87W810 (on advanced progenyfrom a cross between ICSV 1002 and Malisor 84-7) was tolerant of bugs. Studies in Montpellier, France, in 1991 and 1992 showed that sorghum grain hardening was due to the endosperm rather than the pericarp and that it was quicker in Malisor 84-7 than in susceptible S34 and intermediate and subcoated IRAT 202. Resistance was therefore attributed to hardening pattern rather than to free phenolic compounds or tannin content. A study at Samanko in 1992 showed that resistance was recessive with no maternal effect. In 1992 at Samanko, an advanced progeny from a cross between ICSV 1014 and Malisor 84-7 combined reasonable head bug tolerance and acceptable agronomic characteristics, confirming that resistance is transferable by pedigree breeding. |
| Numéro du document : |
A 96000/H00 |
| Niveau Bibliographique : |
2 |
| Bull1 (Theme principale) : |
PROTECTION DES VEGETAUX |
| Bull2 (Theme secondaire) : |
RAVAGEURS DES PLANTES |
Host –plant resistance in sorghum to eurystylus immaculatus in West Africa [texte imprimé] / A. Ratnadass, Auteur ; O. Ajayi, Auteur ; G. Fliedel, Auteur . - 1995 . - p 191-199. Langues : Anglais ( eng)
| Catégories : |
SCIENCES AGRICOLES
|
| Mots-clés : |
RESISTANCE VARIETALE SORGHO AFRIQUE DE L'OUEST EURYSTYLUS IMMACULATUS INSECTE RAVAGEUR |
| Résumé : |
Screening trials conducted in 1989-92 at Samanko and Bagauda showed that the loose-panicled sorghum cultivars IS 17645, IS 20740 and IS 20638 consistently supported fewer head bugs (eurystylus immaculatus) than other calocoris angustatus-resistant genotypes, under both natural and artificial conditions of infestation. Malisor 84-7 was the most resistant under both natural and artificial infestation at Samanko and Cinzana and Farako-Bâ in 1989 and 1990, and under natural infestation at Bagauda in 1990. Malisor 84-7 confirmed high and stable head bug resistance, both under natural and artificial infestation, in terms of bug populations and damage at Samanko in 1991 and 1992 and at Farako-Bâ in 1991. Although relatively less attractive to bugs, ISIAP Dorado was severely damaged under artificial infestation, while 87W810 (on advanced progenyfrom a cross between ICSV 1002 and Malisor 84-7) was tolerant of bugs. Studies in Montpellier, France, in 1991 and 1992 showed that sorghum grain hardening was due to the endosperm rather than the pericarp and that it was quicker in Malisor 84-7 than in susceptible S34 and intermediate and subcoated IRAT 202. Resistance was therefore attributed to hardening pattern rather than to free phenolic compounds or tannin content. A study at Samanko in 1992 showed that resistance was recessive with no maternal effect. In 1992 at Samanko, an advanced progeny from a cross between ICSV 1014 and Malisor 84-7 combined reasonable head bug tolerance and acceptable agronomic characteristics, confirming that resistance is transferable by pedigree breeding. |
| Numéro du document : |
A 96000/H00 |
| Niveau Bibliographique : |
2 |
| Bull1 (Theme principale) : |
PROTECTION DES VEGETAUX |
| Bull2 (Theme secondaire) : |
RAVAGEURS DES PLANTES |
|
Affiner la recherche Interroger des sources externes
