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采用ＮＣⅡ遗传交配设计，选用３个陆地棉常规品种和５个陆地棉族系种质系材料杂交，杂种Ｆ１生理生化性状的中亲优势、竞争优势明显存在。过氧化物酶（ＰＯＸ）活性、叶面积、干重及光合速率的优势率较大，特别是植株生长前期优势更大，说明棉花种内杂种在生长前期表现生长和光合作用优势。色素类性状的中亲优势、竞争优势都为负，并且生长前期表现更大的负向优势，因此不能简单地把色素高含量与产量高优势联系起来。生理生化指标不同时期中亲优势分别和皮棉产量中亲优势作通径分析表明，叶面积、干重与酶活性、光合速率这两个多元系统的变异能较好地反映皮棉产量优势的变异。并对生理生化性状相互间关系及与蕾铃脱落、皮棉产量的关系进行了讨论。
The NCⅡ genetic mating design was used to select the cross between three conventional varieties of G. hirsutum and five germplasm lines of G. hirsutum. The competitive advantage of the hybrid F1 was obvious. The dominant rate of peroxidase (POX) activity, leaf area, dry weight and photosynthetic rate were higher, especially in the early stage of plant growth, indicating that hybrids in cotton showed the advantages of growth and photosynthesis at the early growth stage. Pigment traits of the pro-dominant advantage, the competitive advantage is negative, and pre-growth performance of a greater negative advantage, it can not simply high pigment content and yield advantages. The results of path analysis showed that the variation of leaf area, dry weight, enzyme activity and photosynthetic rate in these two multivariate systems could better reflect the variation of lint yield. The relationship between physiological and biochemical traits and the relationship between the detachment of buds and lint yield was discussed.