亚麻品种抗旱性评价研究

Research on assessment of flax drought-resistance

亚麻是我国干旱冷凉地区用其它油料作物不能替代的主要油料作物和主要的经济作物,加强抗旱性鉴定研究在亚麻抗旱育种中有着十分重要的作用。本文利用水、旱地分组亚麻品种比较试验中对15个品种的11个性状测定资料,通过对水、旱地各性状进行成对数据差异显著性测定、抗旱系数及抗旱指数评价,对亚麻抗旱性进行研究,结果表明:亚麻的性状在水、旱栽培条件下表现差异较大,水、旱地间除每果着粒差异t测验不显著外,其它性状间差异t测验都达到了极显著水平;当以水地条件选育的陇亚7号为对照品种,用抗旱指数法评价15个分供试亚麻品种的抗旱能力时,本站旱作条件下选育的13个品种有10个抗旱能力评价为"好",3个为"较好"和"中",而其它两个水地或阴湿环境选育的品种被评价为"中"和"差"。得出了与多年亚麻育种实践经验十分吻合的抗旱能力结果,启发我们在育种基础阶段就采用此法进行亚麻抗旱能力测定。

Flax is the main oil and cash crop in arid and cool area,which cannot be replaced by other crops.Therefore,it is important to enhance research on flax drought-resistance in its breeding.Comparative tests were done in both irrigated and non-irrigated fields,by using 11 traits of 15 varieties,in which pairing data were compared,differences were analyzed,and coefficient and index of drought-resistance were especially considered.It was indicated that there were great difference of flax traits under irrigated and non-irrigated conditions respectively.Only difference of seed numbers per berry wasn＇t significant.Significance of difference of other traits,however,was very great.Taking nougat as the check and using 15 varieties as testing materials,drought-resistant capacity was studied with drought-resistant index method.The results showed that 10 of 13 varieties bred by our unit were ＂good＂ and 3 of them were ＂relatively good＂ and ＂medium＂ but 2 varieties bred under irrigated or moist conditions by other units were ＂medium＂ and ＂poor＂ separately.This paper told us it was necessary to do it this way so efficiency could be improved greatly.