棉花杂种优势与几种生理生化指标的相关性

对８个陆地棉杂种及其亲本的四种生理生化指标进行了测定，并研究了这些指标与杂种产量优势的相关性，结果表明：幼芽匀浆互补法对Ｆ１皮棉超亲优势、中亲优势的预测相符率分别为８７．５％和７５．０％；杂种萌动种子ＡＴＰ含量普遍高于双亲平均值。超亲优势、中亲优势与杂种ＡＴＰ含量及双亲ＡＴＰ含量的平均值均呈正相关，且中亲优势与杂种ＡＴＰ含量相关显著（ｒ＝０．７１８８，Ｐ〈０．０５）；杂种产量优势与盛蕾期、盛花期的

The Correlations Between Cotton Heterosis and Physiological and Biochemical Indexes

Four physiological and biochemical indexes of eight cotton hybrids and their parents (G. hirsutum L. ) were determined and the correlations between the indexes and the hybrids yield heterosis were studied. The results showed that: 1. The prediction probability for super-parent heterosis and mid-parent heterosis of F1 lint yield with the method of homogenated parent seedlings was respectively 87. 5 % and 75. 0%.2. ATP content in the germinating hybrid seeds was higher than the average of that in their parent seeds. There were positive correlations between super-parent and mid-parent heterosis of yield and ATP content in the hybrids and ATP content mean in their parents, but there was significantly positive correlation (r=0. 7188, P<0. 05 )between mid-parent heterosis and ATP content in the hybrid seeds. 3. There was irregular correlation between lint yield heterosis and hybrid chlorophyll a content and their parents' chlorophyll a content mean at the flourishing bud and flower stages,but hybrid chlorophyll content at flourishing bud stage was higher than that of their parents' and not at flourishing flower stage. 4.Total P content of hybrids was higher than that of their parents' mean. There were negative correltations between super-parent heterosis of yield and total P content of hybrids and total P content mean of their parents. There was significantly negative correlation(r=-0. 8122, P<0. 05) between super-parent heterosis and total P content of hybrids. There was no significant correlation between mid-parent heterosis and total P content of hybrids and the average of their parents.