甜荞花型比率对其主要产量性状的影响

甜荞栽培种有长花柱(Pin,P型)和短花柱(Thrum,T型)2种花型,理论上2种花型比率约为1:1。田间调查发现,不同甜荞品种的花型比率略有不同,且花型比率的不同对甜荞的产量有较大影响。为揭示甜荞花型比率与其主要产量性状之间的关系,进而为育种和生产上提供提高甜荞产量的途径和方法,本研究以‘蒙0208’、‘综甜2号’、‘品甜荞1号’3个甜荞品种为材料,以单株粒数和单株粒重2个产量性状为主要调查指标。通过构建T:P分别为1:9、2:8、3:7、4:6、5:5、6:4、7:3、8:2、9:1的甜荞花型比率,探讨甜荞花型比率与产量性状之间的关系。研究结果表明,花型比率为4:6或6:4时,3个甜荞品种的2个产量性状表现最佳。当花型比率为1:1时,P型花植株的单株粒数和单株粒重优于T型花植株,某种花型的单株粒数和单株粒重一般是在其占比少的时候表现更好。可以推断,当群体中T花型的比率高于80%时,甜荞的产量明显降低。

Low Ca^2＋ Content and Ca^2＋/Na^＋ Ratio in Leaf Tissues Determine Salinity Tolerance in Spanish Type Groundnut （Arachis hypogeal L.）

The study was performed with seven groundnut varieties/genotypes and F1s derived from crossing in all possible combinations without reciprocal among the mentioned varieties/genotypes. The objective was to assess whether low Ca2＋ content and Ca2＋/Na＋ ratio of leaf tissue or stem tissue determine salinity tolerance in terms of economic yield （kernel yield） in groundnut. It revealed that the varieties, “Binachinabadam-6”, “Binachinabadam-5” and the F1 G2 × G3 were most tolerant based on kernel yield under 8 dS/m and 10 dS/m salinity stresses. These two tolerant varieties and the F1 also showed lower Ca2＋ and Ca2＋/Na＋ ratios in leaf tissue, which indicated lower Ca2＋ and Ca2＋/Na＋ ratio of leaf tissue determined salinity tolerance in terms of kernel yield in Spanish type groundnut. These findings could be applied in future plant breeding applications for screening salt tolerant Spanish type groundnut genotypes.