EVALUATION OF A GROWTH REGULATOR ON DEVELOPMENT. STEM BENDING AND SEED YIELD IN CANARY GRASS (Phalaris canariensis L.)

Bodega, J. L.; Dios, M. A. de; Iraola, M. Pereyra

doi:10.1111/j.1744-7348.1996.tb07902.x

Cited by 2 publications

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“…The correlation between seed yield and the changes in number of seeds m 2 in this study agree with those reported for canarygrass (Bodega et al 1995(Bodega et al , 1998 and Argentine wheat (Triticum aestivum) (Bodega and Andrade 1996;Abbate et al 1998); seed yield of canarygrass and wheat was reported to be limited by the number and capacity of seed to be filled (sink) and not by the supply of assimilates (source). If source were the limiting factor, the loss in yield would be accompanied by reduced seed weight.…”

Section: Resultssupporting

confidence: 81%

Sowing date affects yield components of canarygrass seed

Bodega¹,

Dios²,

Iraola³

2003

Can. J. Plant Sci.

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Canarygrass (Phalaris canariensis L.) crops are sown from June to mid-September in the southeastern area of the province of Buenos Aires, Argentina. Sowing dates in this range result in different growing temperatures and photoperiods that affect the duration of developmental stages, biomass production, and seed yield and its components. For Argentina, there are no reported studies that address these effects. This study on the effects of sowing date was conducted during four growing seasons (1996–1999) at the Instituto Nacional de Tecnologí a Agropecuaria (INTA) Experimental Station at Balcarce, Argentina, using a population provided by Dr. Jaime Lloveras, University of Leyda, Spain. Different seeding dates were chosen from June to mid-September. The experiment was a randomized complete block design with four blocks. When the sowing date was delayed, total dry matter (DM) decreased. For early sowing dates seed yield was constant, but after 10 August it was reduced by 1.5% for each day of delay. Earlier sowing increased the duration of pre-anthesis development with greater uniformity in panicle size and the number of seeds. Seed yield was related lin early to the number of seeds and plant dry matter yield (DMY). The rate of progress from emergence to anthesis (1/days from emergence to anthesis) was proportional to the mean photoperiod. Under the environmental conditions in Balcarce, the accumulated required thermal units for anthesis was reduced when sowing was delayed from June to September. This reduction was related to the photoperiod and was estimated as –189.3 growing degree-days per hour of photoperiod increment. Key words: Canarygrass, seed yield, sowing date, yield components

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Section: Resultssupporting

confidence: 81%