林芝山定子部分表型性状多样性研究  

Study on Phenotypic Diversity of Malus baccata in Nyingchi

作　　者：张良英[1] 刘林[1] 牛歆雨[1] 钟林志 

机构地区：[1]西藏大学农牧学院,西藏林芝860000 [2]宜宾县兰亭园艺有限公司,四川宜宾644600

出　　处：《西南农业学报》2016年第11期2720-2723,共4页Southwest China Journal of Agricultural Sciences

基　　金：西藏大学农牧学院青年基金"林芝山定子资源不同居群的表型遗传多样性研究";西藏自治区自然科学基金项目(2015ZR-13-35)

摘　　要：以林芝4个山定子居群为研究试材,研究其果实、叶片、花的相关表型性状及其变异系数。结果表明,山定子果实性状以单果重的变异系数最大,在9.13%-29.36%,果梗长的变异系数次之,为4.67%-17.11%,果实横径、纵径、果形指数性状变异相对较小,果实颜色基本都是红色-深红;叶片性状中叶柄长的变异系数在6.72%-26.98%,为最大,其次为叶面积（最大为18.15%）和叶片厚度（最大为12.44%）,叶长、叶宽、叶周长、叶面积等变异系数基本小于10%;花性状中以花丝长的变异系数最大（最大为12.16%）,其次为雌蕊长和花直径,雄蕊数和雌蕊数变异较小。总体来看,居群4（工布江达）的单果重最高达1.18g,居群3（布久）的花直径最大为39.77 mm;居群4（工布江达）的山定子年龄级结构分布最合理。Four natural populations of Mahas baccata were selected and investigated in Nyingchi, Tibet. Phenotypic diversities were analysised on the basis of traits such as the fruit, the leaf, and the flower. The results showed that, the variation coefficient of fruit mass was the highest in fruit traits （9.13 % - 29.36 % ） , followed by the variation coefficient of length of carpopodium（4.67 % - 17.11% ）. The variation coefficient of transverse length, vertical length and shape index were low. The fruit color of four populations were all red to dark red. In leaf traits, length of petiole had the highest variation coefficient, which was between 6.72 % - 26.98 %. The second were leaf area and leaf thickness. The variation coefficient of leaf length, leaf width, leaf perimeter and leaf area were all below 10 %. In flower traits, the var- iation coefficient of filament length was the highest The second was of pistil length and flower diameter. In these populations, fruit mass of population 4 was highest（ 1.18 g） , the flower diameter of population 3 was largest（39.77mm）. Population 4 had the best population age structure.

关 键 词：山定子 居群 表型性状 变异系数 

分 类 号：S661.1[农业科学—果树学] Q944.1[农业科学—园艺学]