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Effects of reduced plant height on breeding requirements and ...

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),<br />

+.<br />

(<br />

6,<br />

7,<br />

Attempts should be made<br />

heading dates <strong>and</strong> l<strong>on</strong>ger<br />

acceptab]e nâtulîity"<br />

Research should be c<strong>on</strong>ducted<br />

the value <str<strong>on</strong>g>of</str<strong>on</strong>g> heading date as<br />

selectíng superior genotypes<br />

Further clarificati<strong>on</strong> is needed<br />

<str<strong>on</strong>g>of</str<strong>on</strong>g> seed size <strong>on</strong> the seedling <strong>and</strong><br />

in barley"<br />

243<br />

to select genotypes with early<br />

post-anthesis periods, but with<br />

investigating <strong>and</strong> elarifying<br />

a seÌecti<strong>on</strong> tool for breeders<br />

in Western Canada.<br />

Further tests are required <strong>on</strong> a broad range <str<strong>on</strong>g>of</str<strong>on</strong>g> lines to<br />

deterrnine the irnportance <str<strong>on</strong>g>of</str<strong>on</strong>g> fertilj-zer <strong>and</strong> <str<strong>on</strong>g>plant</str<strong>on</strong>g> density<br />

effects <strong>on</strong> semi-dwarf <strong>and</strong> ta11 genotypes, partieula¡Ly<br />

in the nost prod.uctive barley growing ãreas. These<br />

factors should also be studied in combinati<strong>on</strong> with. <strong>on</strong>e<br />

another.<br />

Further research should be c<strong>on</strong>ducted <strong>on</strong> l_arger sanples<br />

to determine the relati<strong>on</strong>ships <str<strong>on</strong>g>of</str<strong>on</strong>g> root parameters <strong>and</strong><br />

seedling gowth with <str<strong>on</strong>g>reduced</str<strong>on</strong>g> pLant <str<strong>on</strong>g>height</str<strong>on</strong>g> Ín barl_ey.<br />

C<strong>on</strong>comitant with this ís the need for research into<br />

improved techniques to be used in the determinati<strong>on</strong> <str<strong>on</strong>g>of</str<strong>on</strong>g><br />

root growth parameters j¡r cereal crops in general.<br />

in regard. to the effect<br />

root growth parameters

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