Abstract:
Besed on the cotton varieties that joined the Yellow River Valley Regional Variety Test,the distributional characteristics and the correlations of lint yield,bolls/plant,singht boll weight,lint percent,2.5% span length,specific strength and micronaire for cotton varieties were studied.The results indicated that lint yield were mainly within 900-1300kg/hm2,and 2.5% span length were mainly within 27-30 mm,the specif ic strength were mainly within 18-22 cN/tex,the micronaire were mainly within 3.7-4.9.The analysis results of varieties bred in different yrars or different breeding units showed that the lint yield were remarkably increased from the 70's of the 20th century to the early part of 21th century,the upper value of 2.5% span length and the specific strength were not obviously changed,the micronaire of varieties bred inHebei province,Henan province and Jiangsu province there are the trend from optimum value to partial thickness value.The results of part ial correlation showed that the lint yield showed extremely significant positive correlations with bolls/plant,single boll weight and lint percent,while showed significant negative correlat ion with 2.5% span length; that of bolls/plant showed extremely signif icant negative correlation with single boll weight,while showed extremely significant positive correlation with 2.5% span length; that of single boll weight showed extremely significant positive correlat ion with 2.5% span length,while showed signif icant positive correlat ion with micronaire; that of micronaire showed extremely significant negative correlation with 2.5% span length,while showed extremely significant positivecorrelation with specific strength.The results of canonical correlation showed that there are true correlations between yield characters and quality characters of cotton,and the correlativity of bolls/plant with 2.5% span length,lint percent with micronaire were main cause of correlations of them.
Key words:
Yellow River Valley,
Cotton variety,
Objective character,
Distribution,
Correlation
CLC Number:
WANG Zhi-zhong, LIU Xiu-ju, LIN Yong-zeng, WANG Shu-lin. Studies on the Distributional Characteristics and the Correlation of Main Objective Characters for Cotton Varieties in Yellow River Valley Regiun[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2006, 21(S2): 97-102. doi: 10.3321/j.issn:1000-7091.2006.z2.024.