首页   按字顺浏览 期刊浏览 卷期浏览 Selection for Seedling Emergence Using a Glasshouse Test in Pearl Millet*
Selection for Seedling Emergence Using a Glasshouse Test in Pearl Millet*

 

作者: J. R. Witcombe,   P. Soman,  

 

期刊: Plant Breeding  (WILEY Available online 1992)
卷期: Volume 108, issue 1  

页码: 75-80

 

ISSN:0179-9541

 

年代: 1992

 

DOI:10.1111/j.1439-0523.1992.tb00102.x

 

出版商: Blackwell Publishing Ltd

 

关键词: Pennisetum glaucum;seedling emergence;screening test;genotypic correlations;selection gain

 

数据来源: WILEY

 

摘要:

AbstractDespite a fovourable environment during seed filling, ripening and harvest, and good storage conditions subsequent to harvest, there is variation for the ability of seeds of progeny of pearl millet (Pennisetum glaucum[L.] R. Br.) composites to emerge under favourable conditions in pots, or in the field. Seedling emergence in pots and in the field was found to be a heritable trait in at least two of four composites that had not been specifically constructed for improvement of seedling emergence. The predicted genetic advance from selection for ability to emerge in pots is appreciable. From examination of genotypic correlations, there will be smaller but useful gains over selection cycles in ability to emerge in the field by selection for improved emergence in pots. Direct selection under carefully controlled conditions in the field will produce higher gains, but is more resource consuming than a pot test.We conclude that screening progenies in a pot test in a glasshouse and discarding progenies with poor emergence before a field progeny trial will reduce missing plots due to poor seedling emergence. Selection for improved emergence in pots should lead to an appreciable improvement in seedling emergence in the field over cycles of selection. The pot test is, therefore, a cost effective selection method for the important trait of high seedling emergence.

 

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