查询词典 heterosis

The principles of several DNA Molecular markers and their application on assessment of germplasm genetic diversity,fingerprinting construction,classification of heterotic groups and heterosis prediction for maize were reviewed.The present problems and prospective of molecular markers application in germplasm resource we...

介绍几种DNA分子标记的原理，综述了DNA分子标记在玉米种质遗传多样性鉴定、绘制指纹图谱、杂种优势类群划分和杂种优势预测等方面的应用，并探讨了在玉米种质研究中存在的问题和应用前景。

The higher percentage of cross-fertilized kernel specifically expressed pattern was observed in highly heterotic hybrid, after comparison of gene differential expression between cross-fertilized and self-fertilized kernels during the early development of seed in wheat and maize, respectively. This indicated that there may be have common molecular mechanism for heterosis in different crops.

本文对玉米和小麦在种子发育前期杂交和自交间基因差异表达进行了比较，发现杂交特异表达类型与杂种优势均存在一定的正向关系，说明不同作物杂种优势形成在分子水平上具有共同点，即相同表达模式的基因或基因群在不同作物杂种优势形成中发挥一致的作用。

Heterosis is based on the heterozygosity of heterozygotic genotypes.

育种实践表明，杂种优势的遗传基础是杂交种基因型的杂合性。

The experiment aimed to explore the inheritance of BC1F3 to excellent characteristics of parents (Elymus dahuricus; Hordeum brevisubulatum), heterosis and fertility restoration.

［目的］探明BC1F3代对亲本优良特性的继承情况、杂种优势及育性恢复情况。

He parameters fitted with Richards indicated that T showed lower final weight and initial specific growth rate, and higher inflection point time. The hybridation of TD had greater heterosis in final weight, inflection point weight, initial spec

D产肉性能比T提高很大，尤其在高海拔，超过了双亲的性能，杂种优势很高。T心重率、肝重率、胃重率和单位体重小肠长度比其他品种高，胸肌剪切力性状变异较大。

Just the CTK content, the ABA content in its tiller node were most significantly related and most significantly negatively related to the tiller number of intervarietal hybrid respectively, but beside the CTK content, the ABA content in its tiller node were significantly related and significantly negatively related to the tiller number respectively, the IAA content were also most significantly related to the tiller number of interspecific hybrid, this may be the reason why the interspecific hybrid had a high fertile spike heterosis.

品种间杂种分蘖盛期分蘖节仅细胞分裂含量与分蘖数呈极显著的正相关，而脱落酸含量与其分蘖数呈极显著的负相关。而种间杂种分蘖盛期分蘖节中的细胞分裂素含量与其分蘖数显著正相关、脱落酸含量与其分蘖数呈显著负相关，另外其分蘖节中的生长素含量也与其分蘖数呈极显著正相关，IAA在种间杂种中的共同参与可能是种间杂种具有较强的分蘖成穗能力的原因。

For cooperation to the utilization of heterosis and the selection of "three lines" in crops by the people, we have studied the metabolic condition of "three lines" in Sorghum and rice with irradiant isotops.

配合群众性杂种优势利用及&三系&选育科学实验，应用放射性同位素对高梁及水稻&三系&植株的代谢情况进行了研究。

For cooperation to the utilization of heterosis and the selection of"three lines"in crops by the people,we have studied tbe metabolic condition of"three lines"inSorghum and rice with irradiant isotops.

配合群众性杂种优势利用及&三系&选育科学实验，应用放射性同位素对高粱及水稻&三系&植株的代谢情况进行了研究。

The heterosis use model mainly is the Kafir×kaoliang, the kaoliang×kaoliang, trend Kafir×trend kaoliang, the Shallu×trend kaoliang.

杂种优势利用模式主要是南非高粱×中国高粱，中国高粱×中国高粱，倾南非高粱×倾中国高粱，印度高粱×倾中国高粱。

Additionally, heterosis from cross breeding was analyzed and discussed. The major results and conclusions are presented as follows:1 Variances of shell shape and phenotypic traits among different stocks or populations of Meretrix clam1.1 The shell shapes of seven natural stocks(L、S、J、Z、F、G、W)and one cultured stocksshowed certain differences as well as similarities.

主要结果和结论如下：1文蛤不同群体的形态和性状的变异规律1.1文蛤不同群体的形态变异特征利用多变量形态度量学方法，对文蛤的辽宁、山东、江苏、浙江、福建、广西、白壳等7个自然群体和1个浙江养殖群体的形态变异进行研究。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。