Correlation Analysis of Main Economic Traits of Upland Cotton (G.hirsutum) with High Fiber Quality

The correlation among main yield and fiber traits of upland cotton with high fiber quality was investigated by using correlation and path analysis methods.The results showed that the PECC,PACC,DPC between bolls per plant and lint yield were bigger than the ones between the other economic traits and lint yield respectively.Lint percentage came second in PCC and DPC.The PECC,PACC and DPC between fiber strength and lint yield per plant were-0.206,0.481,0.129 respectively.Correlation between fiber length and lint yield was negative,but not statistically significant.Positive correlation between fiber length and micromaire was observed.These results indicated that excellent boll retention should be chosen for developing high yielding variety with high-quality fiber.Selection for high lint percentage could achieve better effect. Selection for high specific strength had no negative effect on the obtention of high yield genotype.The correlation among fiber length,strength and micronaire of cotton for spinning high value yarn were still inconsistent.Further improvement is needed.Some suggestions on the development of high yielding upland variety with high fiber quality are presented.