雁属

基本解释 (translations)

Anser

与雁属相关的网络例句 [注：此内容来源于网络，仅供参考]

Geese gabble goose单数 Any of various wild or domesticated water birds of the family Anatidae, and especially of the genera Anser and Branta, characteristically having a shorter neck than that of a swan and a shorter, more pointed bill than that of a duck.

鹅：任何一种野生或家养的鸭科的水鸟，特别是指雁属和黑雁属的水鸟，特征是颈比天鹅的短，嘴比鸭的短而尖

Swans are birds of the family Anatidae, which also includes geese and ducks.

天鹅属雁形目中的鸭科中的一个属，鸭科还包括鹅和鸭。

Any of various wild or domesticated water birds of the family Anatidae, and especially of the genera Anser and Branta, characteristically having a shorter neck than that of a swan and a shorter, more pointed bill than that of a duck.

鹅：任何一种野生或家养的鸭科的水鸟，特别是指雁属和黑雁属的水鸟，特征是颈比天鹅的短，嘴比鸭的短而尖

The investigation results showed that there were 26 species of the waterfowl of Anatidae, belonging to 7 orders, of which 1 species belong to gradeⅠ key state-protected species and 3 species (Cygnus columbianus, Anser albifrons and Branta ruficollis) belong to gradeⅡ key state-protected species.

结果表明：共调查记录到雁鸭类7属26种，其中国家重点保护动物4种，包括国家Ⅰ级重点保护动物1种［中华秋沙鸭］和国家Ⅱ级重点保护动物3种［小天鹅(Cygnus columbia-nus)、白额雁和红胸黑雁］。

Two distance models of amino acid sequence could be used to calcul ated Anatidae molecular clocks and their result are accurate. The estimation of the split between Phasianidae/Anatidae is 116.3785MYA ("""" l+2TiTv""""). The divergence time of Anser/Anatinae is estimated to be 71.2247MYA("""" l+2TiTv"""").

估计雉科与鸭科、雁属与鸭亚科、河鸭属与其它4个鸭属(鹊鸭属、绒鸭属、栖鸭属、斑胁草雁)间的分歧时间分别为116.3785MYA(&1+2TiTv&)和101.798MYA和129.461MYA、71.2247MYA(&1+2TiTv&)和55.1225MYA和62.52231MYA、36.8749MYA(1+2TiTv)和32.9498MYA和35.5044MYA。

Aves Anseriformes Anatidae Anas River.

鸟纲雁形目鸭科河鸭属。

Any of several small, dark wild geese of the genus Branta that breed in arctic regions, especially B.

黑雁一种黑雁属小型黑色野鹅，产于北极地区，尤指黑雁属，具有黑色的颈和头

The average percent value of G C (49.3%) was less than that of A T (50.7%), there was a bias of the content of G, T in the third codon; The number of transition G-A and T-C were 22, 15 respectively, which were higher than that of transition A-G and C-T, the number of tranversion C-A, T-G is 2 respectively, and other tranversion patterns didnt occur; the probability of transition was higher than that of tranversion , Ts/Tv = 9.5-19, there was the highest number of transition in the third codon. The gamma parameter a of the lst,nd and 3rd codon positions were 0.00572,0.01237 and 1.05239 respectively, they showed that there was adifferent substitution rate at different codon position. Frequences of synonymous codon usage were relatively biased. The average rates of synonymous and nonsynonymous substitution were 0.0787, 0.0011 respectively, there was a significant difference between dS and dN (Z = 4.713, p.01), and the low ratio( CD = 0.0284 .3) of dN/dS ratio impled that there were selective constraints against the nonsynonymous sites in cyt-b gene, The distribution of nonsynonymous codon substitution pattern related to Grantharm distance indicated that the purified selection at 2nd codon positions was more intensive than that at 1st codon positions. The phylogenetic trees supported the view of the double origin of Chinese goose, which means that domestic Chinese goose was derived from Anser cygnoides and domestic European goose, and Yili was derived from Anser anser.

碱基含量分析可知，序列的G C含量(49.3％)＜A T含量(50.7％)，密码子第三位点的G、T含量都有较强的偏倚性；序列间G→A和T→C的转换数(22次和15次)高于A→G和C→T的转换数(10次和9次)，C→A、T→G颠换数均为2次，其余颠换模式均未发生；转换数明显高于颠换数，Ts／Tv=9.5～19，密码子第三位点的转换数最高，呈现了相当强烈的转换偏倚性；密码子第一、二和三位点的gamma分布参数α值分别为0.00572、0.01237和1.05239，表明密码子第一位点的替换速率变异最大，第二位点次之，第三位点的替换速率变异相对较小；编码同一氨基酸的同义密码子并非随机使用，表现出一定程度的使用偏倚性；同义替换速率和非同义替换速率分别为0.0787和0.0011，dS与dN值间的差异极显著(Z=4.713，p＜0.01)，而ω=0.0284，明显小于0.3，表明雁属鹅细胞色素b基因序列经历了中度净化选择作用；单步非同义替换(Sing-step nonsymonymous codon substitution，SSNCS)分布模式与Grantharm距离之间的关系说明密码子的三个位点所受的净化选择强度不同；构建的最大简约树与邻接树拓扑结构一致，支持中国家鹅的双起源学说，即除伊犁鹅外的其它中国鹅品种起源于鸿雁，伊犁鹅和欧洲的郎德鹅、莱茵鹅起源于灰雁。

与雁属相关的网络解释 [注：此内容来源于网络，仅供参考]

Common Pochard：矶雁

它是矶雁(Common Pochard),长得跟我们在安亚伯认识的美洲矶雁(Canvasback)几乎一模一样. 它俩同属不同种,矶雁比美洲矶雁小一点,嘴峰也多了一抹白. 在台湾几乎看不到它的踪影,有的话会是迷鸟.

Anatidae：鸭科

'''鸭科'''(Anatidae)在[[动物分类学]]上是[[鸟纲]],[[雁形目]]中的一个[[科 (生物)|科]]. 鸭科包括雁形目绝大多数的鸟类,是游禽类最大的一科,多达37属148种,除南极之外世界各地都有分布,中国就有19属46种. [[天鹅]],

Anatidae：雁鸭科

鸭子是由野生属於雁鸭科(Anatidae)的鳬进化而来的. 经过长期的培育及品种改良,现今鸭子的种类很多,以下将介绍目前较常见的品种.

ANSERIFORMES：鸟纲 AVES 雁形目

中华秋沙鸭(Mergus squamatus)属于鸟纲(Aves),雁形目(Anseriformes),鸭科(Anatidae),别名鳞胁秋沙鸭、油鸭、唐秋沙;是第三纪孑遗物种,距今已生存了一千多万年,被称为鸟类中的活化石,属国家I级重点保护动物,是雁形目中唯一一种国家I级保护鸟类.

Helicteres：山芝麻属(梧桐科)

"螺旋构造;螺旋丝","helics" | "山芝麻属(梧桐科)","Helicteres" | "雁婆麻;坡麻;坡油麻","Helicteres hirsuta Lour."

Helicteres angustifolia L：山芝麻(H.M.);山油麻;坡油麻

山芝麻属(梧桐科) Helicteres | 山芝麻(H.M.);山油麻;坡油麻 Helicteres angustifolia L. | 雁婆麻;坡麻;坡油麻 Helicteres hirsuta Lour.

Helicteres hirsuta Lour：雁婆麻;坡麻;坡油麻

"山芝麻属(梧桐科)","Helicteres" | "雁婆麻;坡麻;坡油麻","Helicteres hirsuta Lour." | "扭蒴山芝麻;坡片麻;鞭龙;火索麻","Helicteres isora L."

Rapateaceae：瑞碑题雅科

在鸭跖草目内,瑞碑题雅科(Rapateaceae)和黄眼草科是有密切联系的两个科,黄眼草科或许来自瑞碑题雅科. 胚胎学的特征,提示了麦雁开科(Mayacaceae)与黄眼草科的关系,比鸭跖草科更为密切. 10.玉蜀黍属(Zea) 一年生栽培植物,秆直立,

Wikstroemia：荛华属;雁皮属(瑞香科)

阔铲犁 wide-shovel plow | 温氏定律 Wien's displacement law | 荛华属;雁皮属(瑞香科) Wikstroemia