Leaf gas exchange and yield of three upland rice cultivars

被引：4

作者：

Felix Alvarez, Rita de Cassia ^{[1
]}

Habermann, Gustavo ^{[2
]}

Costa Crusciol, Carlos Alexandre ^{[3
,4
]}

Nascente, Adriano Stephan ^{[3
,4
]}

Rodrigues, Joao Domingos ^{[5
]}

机构：

[1] Univ Fed Mato Grosso do Sul, UFMS, Dept Prod Vegetal, BR-79560000 Chapadao Do Sul, MS, Brazil

[2] Univ Estadual Paulista, UNESP, Inst Biociencias, Dept Bot, BR-13506900 Rio Claro, SP, Brazil

[3] UNESP, FCA, Dept Prod Vegetal, BR-18603970 Botucatu, SP, Brazil

[4] Embrapa Arroz & Feijao, BR-75375000 Santo Antonio De Goias, Go, Brazil

[5] UNESP, Inst Biociencias, Dept Bot, BR-18618970 Botucatu, SP, Brazil

来源：

BRAGANTIA | 2015年 / 74卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

Oryza sativa; net photosynthesis; harvest index; dry matter accumulation rates; crop growth rate; DRY-MATTER YIELDS; GRAIN-YIELD; GROWTH; PHOTOSYNTHESIS; ACCUMULATION; TEMPERATURE; PHILIPPINES; COMPONENTS; HYBRID; LEAVES;

D O I：

10.1590/1678-4499.0322

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Studies of physiological parameters associated with crop performance and growth in different groups of upland rice (Oryza sativa L.) may support plant breeding programs. We evaluated the role of gas exchange rates and dry matter accumulation (DMA) as traits responsible for yields in a traditional (cv. 'Caiapo'), intermediate (cv. 'Primavera') and modern (cv. 'Maravilha') upland rice cultivars. Leaf gas exchange rates, DMA, leaf area index (LAI), harvest indexes (HI) and yield components were measured on these genotypes in the field, under sprinkler irrigation. Panicles per m(2) and DMA at flowering (FL) and heading, as well as CO2 assimilation rates (A) were similar across these cultivars. The highest yield was found in 'Primavera', which may be explained by (i) a two-fold higher HI compared to the other cultivars, (ii) greater rates of DMA during spikelet formation and grain-filling, as well as (iii) a slow natural decrease of A in this cultivar, at the end of the season (between FL and maturation).

引用

页码：1 / 8

页数：8

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