摘要:
以中叶类型无性系乌龙茶品种为试验材料,观察分析其幼年期性状与产量的表型、遗传相关,结果表明,1～2龄期自然生长茶树树高、主干直径、分枝数与产量的相关不显著;3龄期自然生长茶树主干直径、分枝数、着叶数、定剪枝叶量,4龄期定剪枝叶量、春梢数,5龄期产量等7个性状与5～9龄5a平均产量的表型、遗传相关均显著或极显著。据此提出,上述7个性状可以作为乌龙茶产量早期鉴定与选择的目标性状。对幼年期性状与产量的回归分析表明,3龄期主干直径、3～4龄期定剪枝叶量、5龄期产量与5～9龄5a平均产量直线回归关系,而3龄期分枝数、着叶数,4龄期春梢数与5～9龄5a平均产量呈对数回归关系。
Abstract:
Using middle-leaf type and asexual Oolong tea varieties as experimental materials,the phenotypic and genotypic relativities between growth characters of young tea plants and the yield were observed and analyzed.The results showed that the relation between the height.trunk diameter,branch number of naturally growing tea plants in the 1st—2nd year and the yield were not significant;the phenotypic and genotypic relativities among trunk diameter,branch number,leaf number of naturally growing tea plants in the 3rd year,leaf-branch amounts after pruning practice during the 3rd—4th year’s period,spring sprout number tea plants in the 4th year,the yield in the 5th year with averaged 5-year yield during the 5th—9th year’s period reached significant or very significant.It was suggested that the above seven characters could be served as the objective characters for early identification on tea plants yield and variety selection.The regression analysis on growth characters and yield showed that the relation between trunk diameter in the 3rd year,leaf-branch number after pruning practice in the 4th year,yield in the 5th year with averaged 5-year yield and the 5th—9th year’s period were linear regression;whereas,the relation between branch number,leaf number,spring sprout number with averaged 5-year yield and the 5th—9th year’s period was a logarithmic regression.
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