POTENTIAL FOR INCREASING EARLY VIGOR AND TOTAL BIOMASS IN SPRING WHEAT .2. CHARACTERISTICS ASSOCIATED WITH EARLY VIGOR
POTENTIAL FOR INCREASING EARLY VIGOR AND TOTAL BIOMASS IN SPRING WHEAT .2. CHARACTERISTICS ASSOCIATED WITH EARLY VIGOR
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DOI：
10.1071/ar9920541
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发表时间：
1992-01-01
影响因子：
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通讯作者：
WHAN, BR
中科院分区：
文献类型：
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作者：
REGAN, KL;SIDDIQUE, KHM;WHAN, BR
早期生长和干物质总产量的增加被认为是提高地中海型环境产量的有用性状。 在第一部分中，鉴定了品种和一些引进品系的早期生长和总干物质生产的基因型变异。 在这一部分中，在西澳大利亚旺安山的实地研究中，对其中 5 个引进品系和 10 个澳大利亚品种的早期活力相关特征进行了检查。在整个季节的所有采样时间都观察到干物质产量的差异，其中 3 个引进品系（CEP 8058、甘肃 32 号和 V979-28）在早期生长期间的干物质产量始终高于标准品种。 播种后 54 天干物质产量较高的基因型比干物质产量较低的基因型具有更高的相对生长率和绿地面积指数。 少分蘖大叶基因型和多分蘖小叶基因型均具有较高的绿地面积指数和较高的干物质产量。 虽然高干物质产量与大面积的地被覆盖和高光拦截有关，但它与生殖发育的较早开始无关。 需要将早期活力和高干物质产量纳入当地适应的品种中，以证明其在这些环境中的益处。
Increased early growth and total dry matter production have been suggested as useful traits to improve yield in Mediterranean-type environments. In Part I, genotypic variation for early growth and total dry matter production was identified among cultivars and some introduced lines. In this part, characteristics associated with early vigour in five of these introduced lines and ten Australian cultivars were examined in a field study at Wongan Hills in Western Australia.Differences in dry matter production were observed at all sampling times during the season, with three of the introduced lines (CEP 8058, Kansu No. 32 and V979-28) having consistently higher dry matter production than the standard cultivars during the early growth period. Those genotypes with a higher dry matter production at 54 days after sowing had higher relative growth rates and green area indices than those with low dry matter production. Both genotypes with large leaves on few tillers and genotypes with small leaves on many tillers had higher green area indices and higher dry matter production. While high dry matter production was associated with a large degree of ground cover and high light interception, it was not associated with the earlier commencement of reproductive development. Incorporation of early vigour and high dry matter production into locally adapted cultivars is required to demonstrate its benefit in these environments.