杂种的

Replacing complete concentrated feed with mixed concentrated feeds of dwarf elephant grass, brachiaria hybrid Ⅰ and brachiaria hybri Ⅱ, there was no significant effect on the growth and acetone body quality of young goose. The three acids glyceride and high density lipoprotein of serum from 80 day-old geese had no significant difference, but the total cholesterin and low density lipoprotein of geese fed with dwarf elephant grass, brachiaria hybrid Ⅰ and brachiaria hybri Ⅱ were all lower than that fed with concentrated feed to some extent.

用矮象草、臂型草杂种Ⅰ、臂型草杂种Ⅱ混合精料代替全精料养鹅并不会显著影响仔鹅的发育和酮体品质。80日龄鹅的血清TG和HDL差异不显著，但矮象草、臂型草杂种Ⅱ和臂型草杂种Ⅰ饲养的鹅，TC和LDL都一定程度上低于精料组的鹅。

The SCA effect was important in the heterosis of the spike number per plant of the intervarietal hybrid, the SCA and GCA were both important in the heterosis of the grain number of main spike of the intervarietal hybrid; the SCA effect played an major role in the heterosis of the spike number per plant of the interspecific crosses of the common wheat and club wheat, the SCA effect played an major role in the heterosis of the 1000-grain weight of the interspecific crosses of the common wheat and spelt wheat.

普通小麦品种间杂种每株穗数杂种优势中，特殊配合力所代表的非加性遗传效应起了主要作用，而主穗粒数杂种优势中一般配合力、特殊配合力所代表的加性、非加性遗传效应所起的作用相当；普通小麦与密穗小麦种间杂种主穗粒数杂种优势中特殊配合力所代表的非加性遗传效应起了主要作用；普通小麦与斯卑尔脱小麦间杂种千粒重杂种优势中特殊配合力所代表的非加性遗传效应起了主要作用。

It was deduced that epitasis also was one of the genetic factors to indica/japonica hybrid sterility.

标记的互作分析表明，籼粳杂种的育性除了主效基因的单独作用以外，位点之间的互作，即上位性也是一重要的遗传因素。

Nuclear DNA content analysis revealed that hybrid plants had different nuclear DNA content:higher,lower than the parental sum or equal to it.Contrast to the lower and equal hybrids,bigger amount of hybrids with higher DNA content had abnormal leaf,bad growth vigour and poor fertility.

结果表明：杂种形态变异广泛，多数呈中间类型，少数呈偏亲性状；杂种细胞DNA含量不一致，呈现大于、等于、小于双亲细胞DNA含量之和的类型；DNA含量大于双亲之和的杂种与DNA含量等于或小于双亲之和的杂种相比，有较高比例的材料叶型出现畸形和植株生长势弱，育性也更差。

Result Under the same feeding and management conditions, the birth weight and the body weight of F1 germination hybrid goat on the 2nd, 4th , 8th and 12th month were obviously higher than that of Yichang white goat with extremely significant difference (P.01). body length of Fl germination hybrid goat on the 2nd, 4th, 8th and 12th month were increased by 32.46%, 30.00%, 32.05% and 26.57% resp. than that of Yichang white goat, and chest circumference were increased by 26.41 %, 23.68%, 29.39% and 19.73% resp. The average carcass weight of Fl germination hybrid goat on the 12th month was 7.52 kg higher than Yichang white goat and its slaughter rate (47.26%) was 6.67% higher than Yichang white goat. Both the fresh peltry weight and skin area in F1 germination hybrid goat were significantly increased than that of Yichang white goat.

结果］在相同的饲养管理条件下，F1杂种山羊初生重，2、4、8、12月龄体重均明显高于宜昌白山羊，差异极显著(P.01)。F1代杂种山羊2、4、8、12月龄体长分别比宜昌白山羊提高32.46%、30.00%、32.05%和26.57%，胸围分别提高26.41%、23.68%、29.39%和19.73%。12月龄F1代杂种山羊的平均胴体重比宜昌白山羊高7.52 kg，屠宰率(47.26%)比宜昌白山羊高6.67个百分点。F1代杂种山羊鲜皮重、板皮面积均比宜昌白山羊显著提高。

Orientale additional and substitutional lines. chromosome number of 96 BC2 F3 individuals were accounted. Fifteen plants with 2n= 43 and eight plants with 2n= 44 were checked out. GISH results of the individuals with 43 chromosomes showed that they blonged to three different monosomic additions. Two disomic additions, ine double-monosomic addition, one trible- monosomic addition and one monosomic addition were found in the 2n = 44 individuals. One double-monosomic substitution and one monosomic sustitution were obtained.

为了筛选小麦-旱麦草异附加系、异代换系，对普通小麦品种Fukuho×东方旱麦草属间杂种的BC2F3代材料的96粒种子进行了染色体数目的检测，共检出15粒2n=43的种子，8粒2n=44的种子，进一步对以上材料进行的基因组DNA原位杂交，共鉴定出3个单体附加系，2个二体附加系，1个双单体附加，1个小麦三体单体附加，1个附加3条东方旱麦草染色体的小麦单体，在染色体数为42的个体中，检测出1个单体代换，1个双单体代换。

It was also found that some genes which were expressed at high level in heterotic hybrid were underexpressed or expressed at low level in nonheterotic hybrid.

杂种Ⅰ与双亲间基因的差异表达类型较杂种Ⅱ丰富，且发现许多杂种Ⅰ高水平表达的基因在杂种Ⅱ减弱表达或偏低亲表达。

Three genes specified expressed in hybrids and one gene over-expressed in hybrid were found. By cloning, sequencing and BLAST analysis, one specific expression cDNA band was cytosolic isocitrate dehydrogenase gene, the other two were new genes which function were unknown, and the over-expressed cDNA band was proteosome subunit p112 gene.

发现了 3 个杂种鸡特异表达的基因和 1 个杂种鸡表达增强的基因，进一步克隆、测序和比对分析初步表明：杂种特异表达的 cDNA 片断分别为鸡细胞质异柠檬酸脱氢酶基因和 2 个未知功能的新基因；杂种表达增强的 cDNA 片断为鸡蛋白酶体亚基 p112 基因。

The somatic hybrids usually showed specific bands and combined all the bands of both parents. In combinations, some new bands were detected, and occasionally specific bands of parents were lost, which indicated that chromosome recombination and exchange happened after fusion. Additionally, in some combinations, specific bands from leaf parent were detected, which revealed the plants were of putative hybrid origin, because leaf protoplast cannot redifferentiate by both single culture and co-culture.

体细胞杂种一般表现为具有双亲的特征带，且综合双亲的所有带，但在部分杂种中检测到了双亲都没有的新带，也发现有丢失亲本的特征带或共有带的现象，说明融合后染色体发生了重组和交换；有的引物只检测到叶肉亲本的特征带，根据柑橘叶肉细胞无论单独培养还是共培养均不能再生的事实，可推测其为体细胞杂种或二倍体叶肉亲本型胞质杂种。

In the course of present investigation in interspecific hybrid of Tritical crops, cytomixis mas observed at microspore stage, the present investigation deals with detailed analysis of this phenomenon at different conditions.

作者在麦类远缘杂种的减数分裂过程中发现，在减数分裂Ⅰ的前期和小孢子时期均存在核穿壁的现象，并对各种状态下的穿壁现象进行了详细的观察研究。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。