以结缕草(Z oy sia W illd.)杂交后代为材料,以Z014(马尼拉)、Z129(青岛结缕草)及Z077(“兰引3号”结缕草)为对照,以电解质外渗法和地下茎恢复性生长评价其抗寒性,分析抗寒性、枯萎期及青绿期的回归关系。结果表明:叶片电解质外渗率半...以结缕草(Z oy sia W illd.)杂交后代为材料,以Z014(马尼拉)、Z129(青岛结缕草)及Z077(“兰引3号”结缕草)为对照,以电解质外渗法和地下茎恢复性生长评价其抗寒性,分析抗寒性、枯萎期及青绿期的回归关系。结果表明:叶片电解质外渗率半致死温度(LT50)的变化范围为-5.78^-8.26℃,其中22-2、40-2和40-8的半致死温度均低于对照;叶片半致死温度由低到高,即抗寒性由强到弱依次为22-2>40-2>40-8>Z077>Z129>Z014>40-5>31-3>18-1>18-4>37-1>22-3;地下茎恢复生长试验结果表明,杂交后代在-6℃时全部致死,在-2℃处理后均可以恢复生长,恢复生长的百分率变异较大(14.7%~100%),其中31-3与40-2超过Z014与Z077,22-2超过Z077;供试材料间叶片和地下茎抗寒性的测定结果一致;回归分析结果表明,叶片的半致死温度、青绿期及枯萎期相关不显著。展开更多
Tramp-tolerance characters of C299 of Cynodon dactylon (L.) Pers. and two hybrids ‘Tifdwarf’ and ‘Tifgreen’ of C. dactylon×C. transvaalensis Burtt-Davy were evaluated under the light-tramp, medium-tramp and s...Tramp-tolerance characters of C299 of Cynodon dactylon (L.) Pers. and two hybrids ‘Tifdwarf’ and ‘Tifgreen’ of C. dactylon×C. transvaalensis Burtt-Davy were evaluated under the light-tramp, medium-tramp and serious-tramp with a 75 kg tramper. The results indicated that tramp caused leaf blades of C299 narrower, color lighter and turf quality lower; but the turf height and internode length of C299 with different rolling intensity were not obviously different from that of ‘Tifgreen’. The turf quality of C299 under serious tramp is higher than that of ‘Tifgreen’ and ‘Tifdwarf’. C299 had stronger ability to recover in vertical direction than that of ‘Tifgreen’ and ‘Tifdwarf’ under the tramp. The results show that C299 has the high turf quality and tramp tolerance charater.展开更多
评价密度、叶宽、触感、均一性、叶色、青绿期及锈病抗性七个指标,对结缕草(Z oy sia W illd.)属四个种所组成的14个杂交组合中52个杂交后代的坪用价值。结果表明:杂交后代坪用价值得到了明显的改良,共有27个后代的坪用价值综合得分高...评价密度、叶宽、触感、均一性、叶色、青绿期及锈病抗性七个指标,对结缕草(Z oy sia W illd.)属四个种所组成的14个杂交组合中52个杂交后代的坪用价值。结果表明:杂交后代坪用价值得到了明显的改良,共有27个后代的坪用价值综合得分高于双亲或双亲之一,另有25个后代在某一个或某几个性状超过双亲;坪用价值较高的优良杂交后代共有9份,分别为18-1、22-2、31-3、37-1、22-3、40-5、40-8、40-2和18-4,其中18-1表现最优,其坪用价值超过了马尼拉;其它杂交后代坪用价值亦超过了“兰引3号”结缕草。展开更多
文摘以结缕草(Z oy sia W illd.)杂交后代为材料,以Z014(马尼拉)、Z129(青岛结缕草)及Z077(“兰引3号”结缕草)为对照,以电解质外渗法和地下茎恢复性生长评价其抗寒性,分析抗寒性、枯萎期及青绿期的回归关系。结果表明:叶片电解质外渗率半致死温度(LT50)的变化范围为-5.78^-8.26℃,其中22-2、40-2和40-8的半致死温度均低于对照;叶片半致死温度由低到高,即抗寒性由强到弱依次为22-2>40-2>40-8>Z077>Z129>Z014>40-5>31-3>18-1>18-4>37-1>22-3;地下茎恢复生长试验结果表明,杂交后代在-6℃时全部致死,在-2℃处理后均可以恢复生长,恢复生长的百分率变异较大(14.7%~100%),其中31-3与40-2超过Z014与Z077,22-2超过Z077;供试材料间叶片和地下茎抗寒性的测定结果一致;回归分析结果表明,叶片的半致死温度、青绿期及枯萎期相关不显著。
文摘Tramp-tolerance characters of C299 of Cynodon dactylon (L.) Pers. and two hybrids ‘Tifdwarf’ and ‘Tifgreen’ of C. dactylon×C. transvaalensis Burtt-Davy were evaluated under the light-tramp, medium-tramp and serious-tramp with a 75 kg tramper. The results indicated that tramp caused leaf blades of C299 narrower, color lighter and turf quality lower; but the turf height and internode length of C299 with different rolling intensity were not obviously different from that of ‘Tifgreen’. The turf quality of C299 under serious tramp is higher than that of ‘Tifgreen’ and ‘Tifdwarf’. C299 had stronger ability to recover in vertical direction than that of ‘Tifgreen’ and ‘Tifdwarf’ under the tramp. The results show that C299 has the high turf quality and tramp tolerance charater.
文摘评价密度、叶宽、触感、均一性、叶色、青绿期及锈病抗性七个指标,对结缕草(Z oy sia W illd.)属四个种所组成的14个杂交组合中52个杂交后代的坪用价值。结果表明:杂交后代坪用价值得到了明显的改良,共有27个后代的坪用价值综合得分高于双亲或双亲之一,另有25个后代在某一个或某几个性状超过双亲;坪用价值较高的优良杂交后代共有9份,分别为18-1、22-2、31-3、37-1、22-3、40-5、40-8、40-2和18-4,其中18-1表现最优,其坪用价值超过了马尼拉;其它杂交后代坪用价值亦超过了“兰引3号”结缕草。
