Genotype x Environment Interaction of Carotene Content of Yellow-Fleshed Cassava Genotypes in Nigeria  

作　　者：Norbert G. Maroya Peter Kulakow Alfred G.O. Dixon Busie Maziya-Dixon Moshood A. Bakare 

机构地区：[1]International Institute of Tropical Agriculture, PMB5320, Ibadan, Oyo State, Nigeria [2]Sierra Leone Agricultural Research Institute, PMB1313, Freetown, Sierra Leone

出　　处：《Journal of Life Sciences》2012年第6期595-601,共7页生命科学（英文版）

摘　　要：Cassava is an important starchy root crop and a major staple for more than 70 million people in Nigeria. New yellow-fleshed genotypes are being developed to combat vitamin A deficiency. Trials of 18 yellow-fleshed genotypes and two officially released white-fleshed clones, used as checks for 2008/2009 and 2009/2010 seasons in five major cassava growing agroecological zones of Nigeria. The trial locations were Ikenne （humid forest）, Ibadan （forest-savanna transition）, Ubiaja （subhumid forest）, Mokwa （southern Guinea savanna） and Zaria （northern Guinea savanna）. At each location, the trial was established in a randomized complete block design with four replications. The objective of the study was to assess genotype performance and genotype ~ environment interaction for total carotene concentration （TCC）, total carotene content per root （TC-R）, and total carotene content per plant （TC-P）. Significant differences （P 〈 0.001） among genotypes, environments and genotype x environment interaction for all the traits evaluated were observed. For TCC, TC-R and TC-P, the best genotypes across the 10 environments were TMS I051601, TMS 1050311, and TMS 1050998. Variation among genotypes accounted for most of the Total Sum of Squares for TCC （67.9%）, TC-R （39.0%） and TC-P （35.9%）. These characteristics of total carotene were also highly correlated. This study revealed that cassava with total carotene concentration can be assessed using either the TCC, or the TC-R, or the TC-P.

关 键 词：Yellow-fleshed cassava CAROTENE genotype x environment interaction. 

分 类 号：S532[农业科学—作物学] TQ466.1[化学工程—制药化工]