Apetalous canola (Brassica napus) hybrid seed production

TL;DRAbstract

Canola has become an important crop in Australia as demand for its oil continues to increase and the benefits of including it in cropping rotations are recognised. During flowering canola produces an inefficient crop canopy of bright yellow flowers, which reduces radiation penetration. This results in increased leaf senescence and slower crop growth during this stage of development. In an attempt to alleviate this effect the apetalous characteristic (absence of flower petals) was introduced into breeding lines, and incorporated into a cytoplasmic male sterility (CMS) system. The ogura CMS used was a newly developed system which had been introduced from radish (Raphanus sativus) . This study investigated the yields obtained from apetalous male sterile canola lines, in order to determine if apetalous hybrid seed can be produced commercially. Over three years of field trials the yields obtained from apetalous male sterile lines were significantly lower than those of a male sterile petalle

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