These mutants were almost accompanied by variations in agronomic traits such as dwarfism, high sterility, heading date or grain weight.
抗病突变体大多伴随着株高、熟期、育性或粒重等农艺性状的变异。
Recently, great advances have been made in the identification, mapping, cloning and action mechanism of heading date genes, especial QTL in rice.
近年来，在水稻抽穗期基因的发掘、定位、克隆及作用机制等方面，特别是QTL研究方面取得较大进展。
Higher GA3 content in single ridge stage might delay heading date, but higher IAA content in floret differentiation stage might shorten heading date.
单棱期较高水平的GA 3具有延长抽穗期的作用，而小花分化期较高水平的IAA含量则具有缩短抽穗期的作用。
Making use of the culture techniques to regulate the heading date and the pollen density are very important to increase the seed yield of the seed production in the hybrid rice.
利用栽培技术来调节花期和花粉密度，对提高制种产量有重要作用。
Correlation analysis of characters indicates that shortening heading date can cause the increase in grains number per spike and 1000-grain weight, but decreases in spikelet per spike.
性状相关分析表明，随着抽穗期缩短，穗粒数和千粒重增加，但小穗数有减少的趋势。
Regression analysis showed a significant correlation between heading date and PS, indicating that PS was the main factor affecting heading date of japonica cultivar in Southwest China.
回归分析发现，抽穗期长短与品种的感光性呈显著相关，感光性是影响西南地区粳稻品种抽穗期长短的主要因素。
The average temperature and average maximum temperature from heading date to maturity was positively correlated to quality characteristic, and negatively correlated to minimum temperature averaged.
抽穗至成熟期的平均温度、平均最高温度与品质性状均呈正相关，而与平均最低温度呈负相关。
Heading date is an very important agricultural trait for rice breeding, but the genetic control of that remains unclear.
抽穗期是水稻的一种重要农艺性状，但其遗传控制机理还不清楚。
Heading date is the one of the most important traits in rice breeding, because it defines where rice can be cultivated and influences the expression of various agronomic traits.
抽穗期决定水稻品种的适种范围，并且影响其他各种农艺性状，所以抽穗期是水稻育种中最为重要的一个性状。
Heading date is the one of the most important traits in rice breeding, because it defines where rice can be cultivated and influences the expression of various agronomic traits.
抽穗期决定水稻品种的适种范围，并且影响其他各种农艺性状，所以抽穗期是水稻育种中最为重要的一个性状。
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