2个杂交晚稻品种不同秧苗素质下产量及内源激素水平的差异性  

Discrepancy of the Yields and Endogenous Hormones of Two Hybrid Late Rice Varieties under the Different Seedling Quality

作　　者：陈小荣[1] 孙嘉[1] 肖自京[1] 钟蕾[1] 朱昌兰[1] 彭小松[1] 贺晓鹏[1] 傅军如[1] 欧阳林娟[1] 边建民[1] 胡丽芳[1] 贺浩华[1] 

机构地区：[1]江西农业大学作物生理生态与遗传育种教育部重点实验室/江西省作物生理生态与遗传育种重点实验室/农学院,江西南昌330045

出　　处：《江西农业大学学报》2014年第3期463-469,共7页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家自然科学基金项目(31360309;30860136);江西省科技支撑项目(2010BNA03600)

摘　　要：探讨了杂交晚稻不同产量性能品种苗期秧苗弱化处理后大田期恢复正常管理下分蘖及内源激素动态,产量及其构成因素的差异性,结果表明2个水稻品种低素质秧苗条件下的产量及其构成因素均呈现不同程度下降,超级稻品种五丰优T025和对照品种昌优10号低素质秧苗较正常秧苗产量、单株有效穗数、每穗总粒数、结实率、千粒质量分别下降5.03%和6.97%、12.11%和10.50%、5.84%和7.21%、4.46%和9.0%、2.52%和4.05%;低素质秧苗下,五丰优T025较昌优10号单株茎蘖数上升速度快,苗峰值高,下降更为平缓;2个水稻品种大田倒二叶ABA含量均随生育推进持续升高,ZR含量持续下降,IAA和GA3含量先升后降,抽穗期达峰值;低秧苗素质下五丰优T025各生育阶段ABA含量明显低于昌优10号,ZR含量均明显高于后者;总体上,五丰优T025正常秧苗下各生育阶段IAA和GA3含量高于低素质秧苗,昌优10号则相反;2个水稻品种不同秧苗素质下分蘖盛期至抽穗期生长促进类激素总和(IAA+ZR+GA3)与ABA的比值呈上升走势,后开始下降;2个水稻品种齐穗后生长促进类激素IAA、ZR、GA3与生长抑制类激素ABA的比值均是正常秧苗低于低素质秧苗。双季杂交晚稻秧苗期生理性胁迫—大田恢复解除下反弹性生长补偿能力与品种产量稳定性能密切相关。Yields and their components ,dynamics of tillers and endogenous hormones of hybrid late rice varie-ties under the condition of recovery normal management in the field after weak seedling cultivation in the seedling stage were analyzedT.he results showed that yields and their components of the two varieties all decreased under the condition of the lowquality seedlings ,the yield per unit area of super rice variety WufengyouT 025 and the CK variety Changyou10 decreased by 5.03 and 6.97 per cent,panicles per plant 12.11 and 10.50 per cent,grains per panicle 5.84 and 7.21 per cent,seed-setting rate 4.46 and 9.0 per cent,1000-grain weight 2.52 and 4.05 per cent ,respectively .Under the low seedling quality , the increasing rate of the tillers per plant of Wufengy-ouT025 was larger,the seedlings peak value higher ,and the decreasing of the tillers per plant more gently than those of the Changyou 10.Endogenous ABA in the reciprocal leaf in the field of the two varieties all rose and ZR fell continually along with the growth advance ,IAA and GA3 rose at first then fell and peaked at heading .En-dogenous ABA of WufengyouT 025 at the various growth stages under the low seedling quality was all clearly lower than that of Changyou10,while ZR was higher.Endogenous IAA and GA3 of WufengyouT025 at the vari-ous growth stages under the low seedling quality ware all clearly lower than under the normal condition ,but it was the reverse for Changyou 10 as a whole.The ratio of growth promoted hormones summation IAA＋ZR＋GA3 by restrained hormone ABA of the two varieties under the different seedling quality presented uptrend from blooming tillers to heading ,then decreased .The ratio of growth promoted hormones IAA ,ZR,GA3 by restrained hormone ABA of the two varieties after fully heading under the normal seedling quality was lower than that un -der low seedling quality .The rebound growth compensatory ability of the variety under the condition of recovery relieve in the field after physiological stress in the seedling stage was tig

关 键 词：杂交晚稻 不同产量性能品种 秧苗素质 生长补偿效应 内源激素 

分 类 号：S511.33[农业科学—作物学]