引用本文: |
-
夏秀忠,曾 宇,李丹婷,农保选,刘开强,陈仁天,邓国富.广西地方稻种资源微核心种质的抗旱性鉴定评价[J].大中文模板3,2014,(2):137-141. [点击复制]
- XIA Xiu-zhong, ZEN Yu, LI Dan-ting, NONG Bao-xuan, LIU Kai-qiang, CHEN Ren-tian, DEN Guo-fu.Identification of drought resistance of landrace rice mini core germplasm in Guangxi[J].大中文模板3,2014,(2):137-141. [点击复制]
|
|
摘要: |
本研究利用全生育期旱胁迫方法,以穗颈粗、单株有效穗、千粒重、穗实粒数、总粒数、结实率与单株产量7个形态性状的综合抗旱D值为鉴定评价指标,对105份广西地方稻种资源的微核心种质进行了抗旱性鉴定评价。结果表明,在干旱胁迫下,单株产量与穗颈粗呈显著正相关,与其他5个形态性状呈极显著正相关。通过综合抗旱指数D值的鉴定评价,本研究获得了7个强抗旱型的地方栽培稻品种,占6.67%。广西的陆稻资源的综合抗旱力较强,可重点用于强抗旱种质材料的筛选。本研究为广西的抗旱育种提供了材料基础及理论依据。 |
关键词: 广西 稻种资源 微核心种质 抗旱性 鉴定评价 |
DOI: |
|
基金项目:广西“八桂学者”专项经费项目;国家科技支撑计划(2012BAD40B04,2013BAD01B02);广西科学研究与技术开发计划项目(桂科攻1123001-3C);广西青年基金项目(2013GXNSFBA019052);广西农科院科技发展基金项目(桂农科2012JZ02) |
|
Identification of drought resistance of landrace rice mini core germplasm in Guangxi |
XIA Xiu-zhong, ZEN Yu, LI Dan-ting, NONG Bao-xuan, LIU Kai-qiang, CHEN Ren-tian, DEN Guo-fu |
() |
Abstract: |
A total of 105 mini core collection of rice germplasm in Guangxi were indentified through treatment of whole growth period drought stress. D value was employed as the standard of evaluation, which was calculated according to panicle neck thick, effective panicles per plant, 1000-grain weight, filled grained per panicle, panicle density, seed setting rate, and grain weight per plant. The results showed that, under drought stress, grain weight per plant showed a significant positive correlation with panicle neck thick, and highly significant positive correlation with the other five morphological traits. By the evaluation of the comprehensive drought index D value, we obtained seven
local-cultivated rice varieties with high drought resistance type (6.67%). Guangxi upland rice contains high percentage of high drought resistance resources, which can be used for germplasm screening. The identified germplasm is of significance for improvement of rice drought resistance. |
Key words: Guangxi core germplasm whole growth period drought Stress identification and evaluation |