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پاییز  95  برشما عزیزان  تبریک و تهنیت باد



اموزش روش های اصلاح نباتات National Plant breeding study
ارسال شده توسط سیدمهدی شمس تاریخ ارسال : یکشنبه ۱۳۸٧/۸/۱٩

  پژوهش های جهانی اصلاح نباتات              National Plant breeding study

 

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  خلاصه               SUMMARY

A survey was conducted to determine the number of science person years (SY) thatwere devoted to plant breeding research and development (R&D) in the United States public and private sectors. Also, via estimates of cost per SY, annual dollar expenditures for plant breeding were estimated. Data were collected on plant breeding R&D activities defined as (a) basic plant breeding research (PBR), (b) genetic enhancement (GE), and cultivar development (CD), and on SY input per crop and crop group The primary findings were:

 

1  The total number of SYs devoted to plant breeding R&D in the United States is

2,241. The distribution of SYs is 1,499 in private companies, 529 in state and

territorial agricultural experiment stations (SAES), 177 in the Agricultural Research

Service of the U.S. Department of Agriculture (ARS/USDA), and 36 in the Plant

Materials Centers/USDA (PMC/USDA).

. Over the 5-year period 1990-94, the net loss of plant breeding SYs in SAES was

estimated to be 12.5 or 2.5 SYs per year. For the same period, private industry was estimated to have a net growth of 160 SYs or 32 SYs per year. Over public and private sectors, 372 SYs were devoted to PBR, 403 SYs to GE, and 1,430 SYs to CD. Proportions of SYs devoted to these 3 R&D activities vary by employment category. In SAES, percentages of SYs devoted to PBR, GE, and CD were 30, 29, and 41, respectively; in ARS/USDA they were 40, 48, and 12, respectively; and in private industry they were 9, 11, and 80, respectively.

4Crop groups with more than 100 SYs were cereal grains with 892, fruit vegetables

with 213, grain legumes with 207, fiber crops with 136, forages with 122, temperate

fruit and nut crops with 105, and oilseed crops with 104.

5. More than 25 SYs are devoted to each of 16 U.S. crops. Field corn led with 545

SYs or 25% of all plant breeding SYs in the United States. Next were soybean with

156 SYs, cotton with 134 SYs, and wheat with 131 SYs. Crops with 50 to 100 plant

breeding SYs are tomato, alfalfa, sorghum, and potato.

6. Private industry emphasizes the breeding of crops that use hybrid cultivars in agricultural production. Of the 16 crops to w1jich private industry devotes 20 or more plant breeding SYs, 6-com, sorghum, sunflower, sweet corn, sugar beet, and muskmelon-with entirely hybrid cultivars account for 654 SYs. Three crops with both hybrid and pure line cultivars-tomato, pepper, and onion-account for 119 breeding SYs in private industry. Six crops with pure line cultivars-cotton, wheat,

soybean, canola, rice, and lettuce-account for 328 SYs.

In contrast, the public sector has 11 crops with 15 or more breeding SYs, and 7 are

dominated by pure line cultivars.

7. Private industry is estimated to spend $338 million on plant breeding R&D annually or 61% of the U.S. annual expenditure whereas the public sector is estimated to spend $213 million or 39%.

 

 http://www.uplod.ir/download.php?file=309723

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 مقدمه     INTRODUCTION

 

The profession of plant breeding has changed greatly over the past quarter century. In the U.S. and many other countries, laws were written and refined that permitted the protection and/or patenting of biological materials, including plant cultivars. This practice of protection of genes, parent lines, and cultivars has led to a much more formalized protocol for interaction among plant breeders, from both the public and private employment sectors. Also, research in molecular biology has led to techniques, grouped under biotechnology, that greatly expand the array of genes available to plant breeding programs and that can make plant breeding much more precise. As a result of cultivar protection and the prospective use of biotechnology in plant breeding, there had been an immense increase in plant breeding by private companies. This evolution within the plant breeding arena raises questions about many issues. We decided to undertake a National Plant Breeding Study to be divided into several phases. Phase I involved making a comprehensive compilation of the number of Science Person Years (SY) devoted to the U.S. plant breeding industry in total, by employer category (i.e., state agricultural experiment stations-SAES, U.S. Department of Agriculture-USDA, and private industry), by plant breeding activity (i.e., basic plant breeding research-PBR, germplasm enhancement-GE, and cultivar development-CD), and by crop and crop category. Estimates of cost per plant breeding SY were obtained from stratified random samples of employers in the public and private sectors. Mean values were used to estimate the annual cost of U.S. plant breeding R&D and the input by employer category. Further, the net loss and gain of SYs were estimated for the public and private sectors over the past 5 years. This report is a compilation of the data obtained from the survey.

 

 مواد و روش ها           METHODS AND MATERIALS

A questionnaire was constructed with help from the Survey Unit of the Statistical

Laboratory at Iowa State University (see Appendix D). The questionnaire requested data, with 1994 being the base year, on numbers of SYs devoted to PBR, GE, and CD by crop from each employer (see questionnaire for definitions of SY and plant breeding activities). Also requested s whether an employer's input had changed over the 5-year period 1990-94. These data were used to estimate net gains or losses in SYs by employer category

Data on ARS/USDA input into plant breeding research and technology were obtained

from Charles Murphy of the National Program Staff/ARS. The questionnaire also was

sent to 28 USDA Plant Materials Centers (PMC) that select species and accessions of

plants for land conservation purposes. Replies were obtained from 26 PMCs.

The questionnaire was sent to 50 SAES, 2 universities not associated with the SAES,

6 experiment stations in territories administered by the U.S. government, and 17 1890s

colleges. Replies were obtained from all SAES, the 2 universities, 5 of the territorial

experiment stations, and 6 1890s colleges.

A number of address lists were used to compile a group of private companies to receive

the questionnaire. The primary data bases were the membership lists of the American

Seed Trade Association (ASTA) and the National Council of Commercial Plant Breeders

(NCCPB), company names provided by the chairs of Commodity Germplasm

Committees, and state seed trade associations. Several other small association address

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lists were also used. The integrated list with more than 1,000 seed companies and

names of individuals was categorized by state, and these state lists were sent to 1 to 3

plant breeders in each SAES with requests to purge companies that were known to not

have plant breeding programs. After this iteration, the list contained 690 companies and

individuals to whom the questionnaire was sent. About 300 replies were obtained from

this mailing. Attempts were made to contact the non-responders by phone. The

questionnaire was mailed on 20 June 1996 and by 1 November when the survey was

terminated, replies had been obtained via mail or phone from 584 companies and

individuals. Of the 106 with no replies, 69 could not be contacted by mail or phone (it

is assumed that these companies and individuals are no longer in the seed business),

22 had been bought by other companies on the list (their SY data were included in

buying companies' replies), 2 refused to provide data, and 13 provided no data in spite

of verbal promises to do so. Of the 584 companies from which replies were obtained,

329 reported SY data and 255 reported having no in-house plant breeding R&D. The 15

companies that refused or did not participate in the survey equaled 2.5% of the 599

companies and individuals that are known to be in business. If this group of 15 have the

same percentage with PBR as did the group of 584 (56%), data was not obtained from

8 companies and individuals with an estimated 36 SYs.

Thus, the data obtained represents 100% of plant breeding SYs from the SAES and

USDA and an estimated 97.5% of the plant breeding SYs in private industry.

In addition to putting U.S. annual plant breeding expenditure in terms of SYs, we have

estimated an annual dollar input also. Although, we have attempted to collect SY data

from all institutions and companies that do plant breeding R&D, data on dollar costs per

SY were obtained from samples of institutions and companies. SAES were requested

to provide data on cost per plant breeding SY for several crops. A weighted mean was

obtained from these data (Table 16). The cost per plant breeding SY in ARS/USDA was

provided by a member of the National Program Staff/USDA (Table 16). Companies were

stratified according to number of SYs and 175 were asked to provide data on cost per

plant breeding SY. One hundred replied, with 2 declining to provide data. Estimates

from the remaining 98 were placed in the proper strata and mean values were computed

for the 6 strata given in Table 15.

تحقیقات پایانی                          PAST STUDIES

Several studies have been completed over the past 15 years to assess

(a) numbers of SYs or Full Time Equivalents (FTEs) devoted to plant breeding in the United States and

(b) changes that are occurring in planting breeding SYs or FTEs over time. None of

these is exactly comparable to our survey, but each does provide some data that are

useful for comparison purposes.

Brooks and Vest (1985) surveyed for breeding of horticultural crops in the public sector

(i.e., SAES and USDA). They received replies from all 98 institutions surveyed and the

ARS/USDA, and from these data they predicted a 13% decrease in FTEs devoted to

plant breeding of horticultural crops in the public sector from 1983 to 1990, i.e., from 179

to 156 FTEs. Collins and Phillips (1991), while conducting a survey of land-grant

universities and 1890s colleges on graduate training in plant breeding, found that the

numbers of plant breeding FTEs in these institutions for all crops were 477 and 459 in

1980 and 1989, respectively. This equated to an FTE loss of 1.8 per year during the 1980s.

James (1990) surveyed the SAES and ARS/USDA with 100% return and reported that

in 1989 the public sector supported 417 plant breeding FTEs, with 283 in the SAES and

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134 in ARS. This study reported 144 FTEs in horticultural crop breeding, which was

19.6% less than the 179 FTEs that Brooks and Vest (1985) reported for 1983 and 8%

less than the 156 FTEs these authors predicted for 1989. A survey by Collins and

Phillips (1991) showed that the SAES supported 354 FTEs in breeding of forage and field

crops in 1984-85. This study projected 385 plant breeding FTEs in SAES in 1990.

Kalton and Richardson (1983) sent a survey to 175 private companies with plant

breeding programs and received replies from 160. Their data were not reported in FTEs,

but rather as numbers of BS, MS, and PhD scientists involved in plant breeding. They

found that the 160 companies employed 1,191 scientists with 41%, 23%, and 36%

holding BS, MS, and PhD degrees, respectively. About 23% (276) of these scientists

were breeding horticultural crops. Kalton et al. (1989) conducted another survey of 203

companies of which 157 replied. The number of plant breeding FTEs reported was

1,568, with 37%, 20%, and 43% holding BS, MS, and PhD degrees, respectively.

All these studies and our study were aimed at estimating the numbers of plant breeding

FTEs or SYs in the United States. No one of them subjected the public and private

sectors to the same survey or questions. Generally though, all agreed on a modest

shrinking of plant breeding in the public sector and a sizable increase in plant breeding

in the private sector.

  نتیجه                 RESULTS

The number of SYs devoted to plant breeding research and technology (R&D) in the

United States in 1994 was 2,241 (Tables 1 and 2), with 529 (23%) in SAES, 177 (8%)

in ARS/USDA, 1,499 (67%) in private industry plant breeding, and 36 (2%) in the PMC.

The total number of SYs in SAES, ARS/USDA, and private industry is 2,205. (Because

98% of the plant breeding SYs are employed by SAES, ARS/USDA, and private industry,

subsequent discussion will concentrate on the 2,205 SYs employed by these 3

employment categories.)

 

 

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