机插密度和穗肥减量对优质食味水稻品种籽粒淀粉合成的影响

陈云, 刘昆, 张宏路, 李思宇, 张亚军, 韦佳利, 张耗, 顾骏飞, 刘立军, 杨建昌

Effects of machine transplanting density and panicle nitrogen fertilizer reduction on grains starch synthesis in good taste rice cultivars

CHEN Yun, LIU Kun, ZHANG Hong-Lu, LI Si-Yu, ZHANG Ya-Jun, WEI Jia-Li, ZHANG Hao, GU Jun-Fei, LIU Li-Jun, YANG Jian-Chang

表3 优质食味水稻抽穗后不同时期籽粒中淀粉合成关键酶活性与成熟期稻米直链淀粉、总淀粉含量的相关(2018年)

Table 3 The correlation between the activities of key enzymes involved in grain starch synthesis in good taste rice cultivars at different stages after heading and the amylose and total starch content at mature stage in 2018

酶类型 Enzyme type	淀粉含量 Starch content	抽穗后天数 Days after heading
酶类型 Enzyme type	淀粉含量 Starch content	8 d	12 d	16 d	20 d	24 d	28 d	32 d
SBE	直链淀粉含量Amylose content	0.303	-0.170	-0.419	0.353	-0.255	0.308	0.603^*
	总淀粉含量Total starch content	-0.110	-0.032	0.095	0.826^**	-0.747^**	0.624^*	-0.149
GBSS	直链淀粉含量Amylose content	-0.505	0.523^*	0.728^**	0.460	0.031	0.209	0.468
	总淀粉含量Total starch content	0.095	0.659^**	0.701^**	0.771^**	-0.652^**	-0.573^*	-0.468
AGP	直链淀粉含量Amylose content	-0.336	0.865^**	0.819^**	0.431	0.279	0.092	0.084
	总淀粉含量Total starch content	0.097	0.699^**	0.762^**	0.776^**	-0.561^*	-0.719^**	-0.195