Topic
Cultivar
About: Cultivar is a research topic. Over the lifetime, 19587 publications have been published within this topic receiving 233504 citations. The topic is also known as: cultivated variety.
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TL;DR: It is suggested that, as a group, tall bread wheats would outyield dwarf wheats only under very severe drought, and the yield responses of tall and dwarf bread wheat groups obtained in these experiments agreed with those seen in extensive international trials under dryland conditions.
Abstract: With a view to understanding the basis of cultivar differences in yield under drought, a wide range of cereal cultivars representing durum wheats (Triticum turgidum L.), triticales (X Tritosecale Wittmack), barleys (Hordeum vulgare), and especially tall and dwarf bread wheats (T. aestivum L.) were studied in field experiments in north-western Mexico over three seasons. Drought was created in this rain-free environment by permanently terminating irrigation at various stages before anthesis. Control treatments were well watered throughout the growing period. Detailed measurements of plant water status, leaf area and dry matter production, anthesis date, yield components and grain yield were made. This paper presents primarily the grain yield data. Drought levels were such that the mean yield of all cultivars under drought ranged from 37 to 86% of control yield, corresponding to irrigation cut-offs varying from 69 days before mean anthesis date to only 10 days before. In each experiment the grain yield under drought showed highly significant cultivar differences, which appeared consistent between years. Yields were adjusted for drought escape by using a correction factor which ranged from 2.9 to 8.5 g/m2 per day advance in flowering, being greater in experiments with less severe drought. The demonstration of linear relationships between cultivar yield and drought intensity, as indicated by the mean yield of some or all cultivars, prompted the consideration of cultivar yield under drought as the function of yield potential (Yp, yield without drought), drought susceptibility index (S), and intensity of drought. The cultivar groups showing lowest S values (most droughtresistant) were tall bread wheats and barleys; dwarf bread wheats were intermediate, and durum wheats and triticales were the most susceptible. However, because dwarf wheats have a higher yield potential (Yp) than tall bread wheats, it is suggested that, as a group, tall bread wheats would outyield dwarf wheats only under very severe drought. Also there was considerable within-group variability of S and Yp. Cultivar S values were consistent across experiments. Yield responses of tall and dwarf bread wheat groups obtained in these experiments agreed with those seen in extensive international trials under dryland conditions.
2,031 citations
Patent•
17 Jan 1995
TL;DR: In this article, a novel soybean cultivar, designated 1572432, is disclosed, which relates to the seeds of soybeans, to the plants of soy beans, and to methods for producing a soybean plant produced by crossing the soybeans with itself or another soybean variety.
Abstract: A novel soybean cultivar, designated 1572432, is disclosed. The invention relates to the seeds of soybean cultivar 1572432, to the plants of soybean 1572432 and to methods for producing a soybean plant produced by crossing the cultivar 1572432 with itself or another soybean variety. The invention further relates to hybrid soybean seeds and plants produced by crossing the cultivar 1572432 with another soybean cultivar.
1,217 citations
Patent•
06 Oct 1995
TL;DR: In this article, a novel soybean cultivar, designated A1923, is described and a method for producing a soybean plant produced by crossing the cultivar with itself or another soybean variety.
Abstract: A novel soybean cultivar, designated A1923, is disclosed. The invention relates to the seeds of soybean cultivar A1923, to the plants of soybean A1923 and to methods for producing a soybean plant produced by crossing the cultivar A1923 with itself or another soybean variety. The invention further relates to hybrid soybean seeds and plants produced by crossing the cultivar A1923 with another soybean cultivar.
1,215 citations
Patent•
31 Dec 2003TL;DR: A novel soybean cultivar, designated S030160, is disclosed in this article, which relates to the seeds of soybean S30160 and the plants of soybeans S03 0160 and to methods for producing a soybean plant produced by crossing the cultivar S3010 with itself or another soybean variety.
Abstract: A novel soybean cultivar, designated S030160, is disclosed. The invention relates to the seeds of soybean cultivar S030160, to the plants of soybean S030160 and to methods for producing a soybean plant produced by crossing the cultivar S030160 with itself or another soybean variety. The invention further relates to hybrid soybean seeds and plants produced by crossing the cultivar S030160 with another soybean cultivar.
1,165 citations
Patent•
12 Feb 2004
TL;DR: A novel soybean cultivar, designated 0509244, is disclosed in this article, which relates to the seeds of soybean and plants of the soybean 0509 244 and to methods for producing a soybean plant produced by crossing the cultivar with itself or another soybean variety.
Abstract: A novel soybean cultivar, designated 0509244, is disclosed. The invention relates to the seeds of soybean cultivar 0509244, to the plants of soybean 0509244 and to methods for producing a soybean plant produced by crossing the cultivar 0509244 with itself or another soybean variety. The invention further relates to hybrid soybean seeds and plants produced by crossing the cultivar 0509244 with another soybean cultivar.
1,165 citations