Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Soudan → Genetic Analysis of Striga Asiatlca (L.) Kuntze Resistance in Line X Tester Crosses of Sorghum

University of Gezira (1996)

Genetic Analysis of Striga Asiatlca (L.) Kuntze Resistance in Line X Tester Crosses of Sorghum

Assar, Ahmed Hassan Abu

Titre : Genetic Analysis of Striga Asiatlca (L.) Kuntze Resistance in Line X Tester Crosses of Sorghum

Auteur : Assar, Ahmed Hassan Abu

Etablissement de soutenance : University of Gezira Wad Medani Sudan

Grade : Master of Science (1996)

Résumé partiel
The current study was conducted to investigate the genetics of Striga resistance in 72 ’sorghum (Sorghum bicolor L. Moench) hybrids and their 17 parents. The experiments were carried out in India during the 1995 rainy season at two locations, ICRISAT Asia Center (IAC), Patancheru, and Akola, Maharashtra State, in randomized complete block designs. The traits measured were Striga incidence, days to 50% flowering, plant height, and grain yield plant-’. The traits showed significant differences at both locations. Both additive and non-additive gene action was found important for the different traits. ’i’he non-additive gene action was found important for Striga resistance though the levels of infestation in the two locations were low. The male-sterile lines L2 (SPST 9401 1 B) and L3 (SPST 94001 B) as well as the restorers, T4 (SAR 35) and T6 (SAR 42) were found to be also resistant. These were bred earlier for resistance to Striga, and these results confirmed that. These lines and testers could be further used in hybrid development for Striga resistance. Among the hybrids, entries 42 (SPST 94008A x SAR 42) and entry 49 (SPST 94026A x SAR 35) were resistant in individual locations and in combined analysis. Among the lines. L3 (SPST 94001 B) and L6 (SPST 94026B) were best combiners for Str ga resistance as well as for earliness. Among the restorers, T6 (SAR 42) and T2 (SAR 16) were good combiners for Str ga low incidence as well as for most of the other traits across locations. As regard plant height, the male-sterile lines L8 (ICSB 93) and L7 (ICSB 89) were found to be :he tallest lines across the locations and in combined analysis. Among the restorers, TI (SAR 1) and T3 (SAR 34) were the tallest. Examination of SCA effects for transformed Striga incidence (SI0/0) at IAC revealed that entry 72 (ICSA 93 x ICSR 93004) had maximum negative SCA effects and high per se performance, followed by entry 37 (SPST 94008A x SAR I), while at Akola, entry 52 (SPST 94026A x ICSR 92001) exhibited the highest negative SCA effects followed by entry 63 (ICSA 89 x ICSR 93004).

Présentation : ICRISAT

Version intégrale (14 Mb)

Page publiée le 23 septembre 2012, mise à jour le 16 novembre 2018