锥栗主栽农家品种生长与产量性状的变异分析

以15个锥栗主栽农家品种为材料,通过3 a的调查,研究了生长与产量性状的遗传变异情况,结果表明：不同农家品种间性状变异丰富,平均变异系数为23.84％；梢长和单株产量的变异较大,变异系数分别为36.57％、35.65％；不同农家品种间地径存在显著差异( P≤0.05),树高、梢长、单株结苞数、总苞重、坚果单粒重、出籽率以及单株产量均存在极显著差异(P≤0.01)；各性状间存在一定的相关性,单株产量与单株结苞数相关性最高,相关系数为0.855,单株产量与树高、冠幅、坚果单粒重相关性较高,相关系数分别为0.458、0493、0.401；各性状值标准化后排名靠前的3个农家品种为处暑红、乌榛、红仔榛,可为锥栗杂交育种和遗传作图的亲本选配提供参考。

Variation analysis of growth and yield traits in Castanea henryi cultivars

Variation of growth and yield traits was analyzed among 15 Castanea henryi cultivars for 3 consecutive years. The results showed that traits varied significantly among cultivars, with average coeffcient of variation being 23. 84%. The variations of shoot length and yield per plant were relatively large with the variation coefficient of 36. 57% and 35. 65%, respectively. The basal diameter had significant difference among different cultivars( P≤0.05) , and there were extremely significant differences( P≤0.01) in tree height, shoot length, involucre number per plant, total involucre weight, per nut weight, seed rate and yield per plant. There was a considerable correlation between traits. The highest correlation coefficient was between yield per plant and involucre number per plant (r=0.855). The correlation coefficients of yield per plant to tree height, crown width and per nut weight were 0.458, 0.493 and 0.401, respectively. The 3 excellent cultivars were ‘Chushuhong’ , ‘Wuzhen’ and‘Hongzizhen’ . The results of this study have provided a basis for selection of parents in crossbreeding and genome mapping.