四川主要野生狗牙根坪用性状与结实性研究

【作者】 陈艳宇；

【导师】 张新全； 吴彦奇；

【作者基本信息】 四川农业大学 ， 草业科学， 2001， 硕士

【摘要】 In order to exploit and make full use of the rich wild resources ofBermudagrass in Sichuan Province, 16 Bermudagrass germplasms werecollected from different ecological environment in Sichuan, 3 foreignvarieties were used as the control group. A two-year field plantingexperiment was done during 1999-2000 in Xipu town of Chengdu City ina subtropics moist climate zone. First, the soil composition and turfcharacteristics were tested, i.e. the transplanting survival rate, the tilleringspeed, the growth speed of stolon, the properties of trassel, period of greentime, leaf color, density, texture, homogeneity, disease resistance, theestablishment speed in turf and so on. All the wild resources ofBermudagrass were evaluated. Secondly, the characteristics of seeding.the properties of reproductive branch in seed field and the situation of itsreproductive period were examined. The varied resources have also beenidentified by systematics. At last, a dendrogram was generated for all the 45 Bermudagrass materials based on the distance m劝Ices using EIGEGEN－ proce恤es InNTSYS－PC．The studyhadshowedthat： （l）In a n咖al environmeM，It has a high tmsPI血lug survival rate （Z98O）； Compared with the one In co咖l groups，It has a longer period’。f gfeentime卿＊0 days），a stronger adaPtability Among them，No． LY98004 has the longest period of rCen tune（270 d叫s）．That of the control is less hn 260 days and No．LY98023（or No．328）has only 249 d时s，which！s the Shortest one． （2）It has a lar驴 number ofroots undergfound（l．25－l．349／ cm3），a 虹ongreslst删etotrample anddrought． （3）ThC biologiC81 dlVCTSlty Is flCh ill SIChLlall Wild gCllCt1C fCSO皿CCS． Th0e’s a certain affinltyrelatlonshlp between different germplasm．nd there’s also some v皿曲lllty among them．It has pe毗ct tUdcharacteristics M good quality for sight． （4）The seed－rating Is poor In Chen部u，where It Is not good for seed production． （5）No．LY98017（Changlin，Yibin）nd No．LY97005（Longchang） are the two excellent ones In the charactenstlcs of turf They’re lso perfeerfect咐ge啊lasm reso删es．Both foreign excelle血 turfurfgrass No． LY98023 eo．328）and them re In the same gfoup； Howevefg No． LY970 7 Qan Zhi加勾 is totally different，It maybe good If used as forage rassbec孤se oflt’stallshectofgrass andfast grow山；No．LY 99010 46（A’ba）can be used to conserve water and soil．However，the t皿fcharacteristics Is odInaryAccodingto all above results，It can beconcluded that Slchuan wlldreso盯ces ofBermudagrass has ahlgh valueto be developed．更多还原

【Abstract】 In order to exploit and make full use of the rich wild resources ofBermudagrass in Sichuan Province, 16 Bermudagrass germplasms werecollected from different ecological environment in Sichuan, 3 foreignvarieties were used as the control group. A two-year field plantingexperiment was done during 1999-2000 in Xipu town of Chengdu City ina subtropics moist climate zone. First, the soil composition and turfcharacteristics were tested, i.e. the transplanting survival rate, the tilleringspeed, the growth speed of stolon, the properties of trassel, period of greentime, leaf color, density, texture, homogeneity, disease resistance, theestablishment speed in turf and so on. All the wild resources ofBermudagrass were evaluated. Secondly, the characteristics of seeding.the properties of reproductive branch in seed field and the situation of itsreproductive period were examined. The varied resources have also beenidentified by systematics. At last, a dendrogram was generated for all the 45 Bermudagrass materials based on the distance m劝Ices using EIGEGEN－ proce恤es InNTSYS－PC．The studyhadshowedthat： （l）In a n咖al environmeM，It has a high tmsPI血lug survival rate （Z98O）； Compared with the one In co咖l groups，It has a longer period’。f gfeentime卿＊0 days），a stronger adaPtability Among them，No． LY98004 has the longest period of rCen tune（270 d叫s）．That of the control is less hn 260 days and No．LY98023（or No．328）has only 249 d时s，which！s the Shortest one． （2）It has a lar驴 number ofroots undergfound（l．25－l．349／ cm3），a 虹ongreslst删etotrample anddrought． （3）ThC biologiC81 dlVCTSlty Is flCh ill SIChLlall Wild gCllCt1C fCSO皿CCS． Th0e’s a certain affinltyrelatlonshlp between different germplasm．nd there’s also some v皿曲lllty among them．It has pe毗ct tUdcharacteristics M good quality for sight． （4）The seed－rating Is poor In Chen部u，where It Is not good for seed production． （5）No．LY98017（Changlin，Yibin）nd No．LY97005（Longchang） are the two excellent ones In the charactenstlcs of turf They’re lso perfeerfect咐ge啊lasm reso删es．Both foreign excelle血 turfurfgrass No． LY98023 eo．328）and them re In the same gfoup； Howevefg No． LY970 7 Qan Zhi加勾 is totally different，It maybe good If used as forage rassbec孤se oflt’stallshectofgrass andfast grow山；No．LY 99010 46（A’ba）can be used to conserve water and soil．However，the t皿fcharacteristics Is odInaryAccodingto all above results，It can beconcluded that Slchuan wlldreso盯ces ofBermudagrass has ahlgh valueto be developed．更多还原