黄麻纤维产量与主要农艺性状的相关分析

研究黄麻纤维产量与主要农艺性状的相关性,可为高产育种与生产利用提供科学依据。本文159份不同来源黄麻种质资源的12个农艺性状对纤维产量即单株干皮重的影响表明,各性状的变异系数变化在11.89%至38.50%之间,表现出丰富的遗传变异。黄麻纤维产量与各性状均呈极显著正相关,其中,与单株鲜皮重、株高、始花期的相关系数较大,分别为0.814、0.760和0.648。黄麻纤维产量和单株鲜皮重、株高、出麻率、鲜皮厚的回归方程达显著水平,其标准回归系数依次为0.443、0.437、0.291和0.113。通径分析显示,单株鲜皮重、株高在决定黄麻纤维产量时起主要作用。出麻率的相关系数(0.253)与直接通径系数(0.291)表现基本一致,说明出麻率直接对黄麻纤维产量起作用,具极显著正相关。因此,在黄麻高产育种中,应该以始花期、单株鲜皮重、株高、出麻率与鲜皮厚为主要筛选对象,兼顾综合性状的改良。

Correlation Analysis between Yield of Bast Fiber and Main Agronomic Traits in Jute (Corchorus spp.)

Studies on correlation between yield of bast fiber and main agronomic traits will provide scientific evidence to the breeding for high yield and reproduction of cultivars in jute. In this study, we analyzed the impact of 12 agronomic traits from 159 different jute germplasm resources on bast fiber yield (dry bark weight per plant). The variation coefficients of different traits varied from 11.89% to 38.50%, indicating abundant genetic variation among these traits. Bast fiber yield had significantly positive correlations with other traits, among which the relative high correlation coefficients between fiber yield and fresh bark weight per plant, plant height, days to flowering were 0.814, 0.760, and 0.648 respectively. The regression equation between bast fiber yield and fresh bark weight per plant, plant height, fresh bark thickness, bark rate was significant, with standard regression values of 0.443, 0.437, 0.291, and 0.113 respectively. Path coefficient analysis indicated that fresh bark weight per plant and plant height played a leading role in the determination of bast fiber yield. Also, the correlation coefficient (0.253) and standard regression coefficient (0.291) of bark rate were very close, showing that bark rate directly affects bast fiber yield, with a significant positive correlation between bast fiber yield and bark rate. Therefore, in breeding jute varieties with high bast fiber yield, it is imperative to take days to flowering, fresh bark weight per plant, plant height, bark rate and fresh bark thickness as main selection criteria with consideration for the improvement of comprehensive traits improvement.