摘要
华西小石积(Osteomeles schwerinae)属蔷薇科(Rosaceae)小石积属(Osteomeles)灌木,为探究白龙江干热河谷华西小石积不同种源抗旱性信息差异,以陇南市武都区、文县和甘南州舟曲县3个种源地23个家系的华西小石积3年生幼苗为试验材料,在武都区两水镇对不同天然华西小石积的子代进行田间栽培对比试验,对23个家系的代谢产物以及叶绿素等指标的测定与分析,运用综合评价的方法对华西小石积抗旱性优良家系进行了选择。结果表明,3个种源地23个家系间,只有个别家系差异不显著,大多数家系间差异显著或极显著,不同家系间遗传变异丰富。23个家系综合各指标抗旱性强弱排序为zq-8>zq-3>wd-3>wd-1>zq-4>wx-2>zq-5>wx-3>zq-12>wx-5>wd-4>wd-5>zq-1>zq-2>wx-1>wx-4>wd-6>zq-6>zq-7>zq-10>zq-9>zq-11>wd-2,抗旱性优良的家系主要来自舟曲种源,其次为武都种源,这可能是由于白龙江干热河谷在舟曲相对于其他两个种源地更加恶劣的气候环境所造成。抗旱指标中Chlb、Chl(a+b)、Chla、Chl(a/b)、SP 5个指标与抗旱隶属函数值关联度较高,对华西小石积的抗旱能力影响最大。抗旱性表现优良的华西小石积家系有zq-8、zq-3、wd-3、wd-1、zq-4。Chlb、Chl(a+b)、Chla、Chl(a/b)、SP 5个指标对华西小石积的抗旱能力影响最大,可作为华西小石积抗旱性评价的着重选择指标。
Osteomeles schwerinae belongs to the shrub of Rosaceae,and Osteomele is a branch of shurb family.The thesis aims at exploring the differences of drought resistance information among different provenances of Osteomeles schwerinae in a dry-hot valley of Bailongjiang River,three seedlings of Osteomeles schwerinae from 23 families in 3 provenances,Wudu District of Longnan City,Wenxian County of Longnan City and Zhouqu County of Gannan Prefecture,were used as the research object.The field cultivation comparative experiment was carried out on the offspring of different natural Osteomeles schwerinae in Liangshui Town of Wudu District.The metabolites and chlorophyll indexes of 23 families were determined and analyzed,and the excellent families with drought resistance were selected by the method of comprehensive evaluation.The results showed that as among the 23 families in the 3 provenances,except a few families with no significant differences,most families had significant or extremely significant differences,and the genetic variation among different families was abundant.The comprehensive ranking of the drought resistance of the 23 families goes as following zq-8 >zq-3 >wd-3 >wd-1>zq-4>wx-2>zq-5>wx-3>zq-12>wx-5>wd-4>wd-5>zq-1>zq-2>wx-1>wx-4>wd-6>zq-6> zq-7>zq-10>zq-9>zq-11>wd-2.The families with excellent drought resistance are mainly from Zhouqu provenance,followed by Wudu provenance,which may be caused by the worse climate environment of the dry and hot valley of the Bailong River in Zhouqu compared with the other two provenances.Among the drought resistance indicators,Chlb,Chl(a+b),Chla,Chl(a/b) and SP have a higher correlation with the value of drought resistance membership function,and it have the greatest impact on the drought resistance of Osteomeles schwerinae.The families of Osteomeles schwerinae with excellent drought resistance are zq-8,zq-3,wd-3,wd-1,zq-4.The five indexes including Chlb,Chl(a+b),Chla,Chl(a/b) and SP have the greatest impact on the drought resistance of Osteomeles schwerinae,which can be used
作者
谢飞
郭星
曹秀文
闫倩倩
Xie Fei;Guo Xing;Cao Xiuwen;Yan Qianqian(Institute of Forestry Sciences,Bailongjiang Forestry of Gansu Province,Lanzhou,730030;Gansu Bailongjiang National Forest Ecosystem Research Station,Gannan,747000)
出处
《分子植物育种》
CAS
北大核心
2024年第1期258-267,共10页
Molecular Plant Breeding
基金
中央财政林业科技推广示范资金项目([2015]ZYTG03)
甘肃省林业和草原科技计划项目(2020kj042)共同资助。
关键词
华西小石积
干热河谷
优良家系
抗旱性
Osteomeles schwerinae
Dry-hot valley
Excellent family
Drought resistance
