About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in CS

  1. Vol. 44 No. 6, p. 2068-2077
     
    Received: Sept 19, 2003
    Published: Nov, 2004


    * Corresponding author(s): karikat@africaonline.co.ke
 View
 Download
 Alerts
 Permissions
 Share

doi:10.2135/cropsci2004.2068

Genetic Responses of Single Crosses of Maize to Striga hermonthica (Del.) Benth. and Striga asiatica (L.) Kuntze

  1. James G. Gethi *a and
  2. Margaret E. Smithb
  1. a Kenya Agricultural Research Institute, RRC Mtwapa, P.O. Box 16, Mtwapa
    b Dep. of Plant Breeding, 524 Bradfield Hall, Cornell Univ., Ithaca, NY 14850

Abstract

Striga hermonthica (Del.) Benth. and Striga asiatica (L.) Kuntze infest millions of hectares of land under cereals in sub Saharan Africa, threatening food security. One of the major crops threatened is maize (Zea mays L.), a staple food for many Kenyans. A diallel cross involving 16 inbred lines was used to study the genetics of resistance to S. hermonthica and S. asiatica Three inbred lines each from TZL comp 1, Zea diploperennis Iltis, Doebley & Guzman × Zea mays (Diplo pool), and a low emergence stimulant pool (LE Pool) classified as resistant were crossed to adapted but susceptible inbred lines CML-204, CML-373, and CML-395 from CIMMYT and MUG-1, MUG-2, MUG-3, and MUG-4 from Kenya. The hybrids were evaluated for two seasons at Matuga for S. asiatica and at Kibos and Alupe for S. hermonthica General combining ability mean squares were higher than specific combining ability mean squares for all traits for the two species, indicating additive genetic effects were more important. Inbreds producing crosses with better resistance than the local checks were identified for both Striga species. Diplo pool and LE Pool were better sources of resistance to S. hermonthica and LE Pool and TZL pools were better sources of resistance or tolerance to S. asiatica.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © 2004. Crop Science Society of AmericaCrop Science Society of America