One of the yield components in rice is the number of effective tillers per unit area that produce harvestable seeds.Increasing tillers per unit area can be achieved by high planting density(HPD);however,a real gain in...One of the yield components in rice is the number of effective tillers per unit area that produce harvestable seeds.Increasing tillers per unit area can be achieved by high planting density(HPD);however,a real gain in grain yield by this practice can be realized only with an associated increase in effective tillers.The tiller angle,defined as the angle between the main culm and lateral tillers,is one of the critical determinants of rice plant architecture(Wang and Li,2008).Narrow tiller angle leads to compact plant architecture,allowing better light penetration and airflow between plants,which is a prerequisite for increasing grain yield by HPD(Wang et al.,2022b).The importance of reduced tiller angle has been evidenced during rice domestication,which transitioned wild rice with a more prostrate growth habit to cultivated rice with a more upright stance,thus enabling increased planting density and yield under agricultural conditions(Wu et al.,2018;Wang et al.,2022b).In modern rice cultivation,the dry direct seeding and the seedling throwing method(random transplanting)are being introduced to reduce labor costs(Hafeez ur et al.,2019).These practices usually result in HPD compared with controlled line transplanting and,as such,varieties with compact plant architecture are much preferred(Hafeez ur et al.,2019).展开更多
基金supported by grants from the Biological Breeding-National Science and Technology Major Project(2024ZD04077)the National Natural Science Foundation of China(31801323)the Innovation Program of the Chinese Academy of Agricultural Sciences.
文摘One of the yield components in rice is the number of effective tillers per unit area that produce harvestable seeds.Increasing tillers per unit area can be achieved by high planting density(HPD);however,a real gain in grain yield by this practice can be realized only with an associated increase in effective tillers.The tiller angle,defined as the angle between the main culm and lateral tillers,is one of the critical determinants of rice plant architecture(Wang and Li,2008).Narrow tiller angle leads to compact plant architecture,allowing better light penetration and airflow between plants,which is a prerequisite for increasing grain yield by HPD(Wang et al.,2022b).The importance of reduced tiller angle has been evidenced during rice domestication,which transitioned wild rice with a more prostrate growth habit to cultivated rice with a more upright stance,thus enabling increased planting density and yield under agricultural conditions(Wu et al.,2018;Wang et al.,2022b).In modern rice cultivation,the dry direct seeding and the seedling throwing method(random transplanting)are being introduced to reduce labor costs(Hafeez ur et al.,2019).These practices usually result in HPD compared with controlled line transplanting and,as such,varieties with compact plant architecture are much preferred(Hafeez ur et al.,2019).
