Milk line as an indicator of the harvesting time of three hybrid seeds of corn (Zea mays L.)

Brazilian Archives of Biology and Technology

Célio Trzeciak Dos Santos²  Valdecir Antoninho Dalpasquale²  Carlos Alberto Scapim²  Alessandro De Lucca E Braccini²  Francisco Carlos Krzyzanowski¹ 

[1] ,Universidade Estadual de Maringá Departamento de Agronomia Maringá PR ,Brazil

关键词: Corn;    seeds;    harvesting time;    milk line;   

DOI  :  10.1590/S1516-89132005000200001

来源: SciELO

【 摘 要 】

The experiment was carried out to evaluate the time for harvesting seeds of three hybrids of corn (Zea mays L.) at their best physiological quality and the use of the milk line as an indicator of the physiological seed maturity. Single hybrids CD 1723 and CD 5501 and double hybrid OC 705 seeds were collected for 59 days, every four days, starting 23 days after female flowering. Seed dry weight, moisture content, germination, vigour (cold and accelerated aging tests), black layer formation and seed milk line development were analysed. The harvesting time started 47 days after female flowering with high physiological quality of the seeds identified by a joint analysis of those seven characteristics of them. The milk line at stage 4 proved to be the best indicator of the time to harvest corn seeds for maximum physiological quality, because different stages of milk line development in corn seeds could be easily identified in the filed without any special equipment.

【 授权许可】

CC BY-NC   
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