An Economic Assessment of Banana Genetic Improvement and ...

BANANA-GROWING HOUSEHOLDS AND BANANA CULTIVARS 69
Table 5.29 Average number of banana suckers received by farmers per genomic
group, by elevation and exposure, Tanzania
Elevation
Exposure
Genomic group
Low High Exposed Not exposed
All
Endemic 27.2* 31.2* 40.3** 3.2** 28.2
Nonendemic 17.4** 11.1** 21.0*** 5.5*** 15.9
Exotic 16.3** 10.8** 20.0*** 4.9*** 15.0
Hybrid 1.1 0.3 1.0 0.6 0.9
Overall average 44.6** 42.3*** 61.3*** 8.6*** 44.0
Note: ***, **, and * indicate statistical significance at the 1 percent, 5 percent, and 10 percent levels,
respectively, in the difference of means or distributions across elevations within countries.
Table 5.30 Average number of banana suckers per genomic group supplied by
farmers to other farmers, by elevation and exposure, Tanzania
Elevation
Exposure
Genomic group
Low High Exposed Not exposed
All
Endemic 61.8*** 373.1*** 69.7*** 274.9*** 137.0
Nonendemic 17.8*** 66.5*** 15.1*** 59.3*** 29.6
Exotic 17.4*** 66.2*** 14.8*** 58.6*** 29.2
Hybrid 0.4 0.3 0.3 0.6 0.4
All groups 79.7*** 439.5*** 84.8*** 335.0*** 166.6
Note: *** indicates statistical significance at the 1 percent level in the difference of means or distributions
across elevation and exposure strata within countries.
disease, or at least perceived to be so. The
number of hybrids grown in these areas is
negligible, both because of less exposure to
them and less disease pressure. The exchange
of planting material in Tanzania
between the lowlands and the highlands,
which is driven by the incidence and severity
of biotic pressures and other production
constraints (such as soil fertility), has implications
for program interventions with
improved planting material. here> 5.30near